DB

ZeroLevel.SqlServer/BaseSqlDbMapper.cs

@@ -0,0 +1,187 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.SqlClient;
+using System.Text;
+
+namespace ZeroLevel.SqlServer
+{
+    public abstract class BaseSqlDbMapper
+    {
+        protected abstract IDbMapper Mapper { get; }
+        protected readonly string _tableName;
+
+        public string TableName { get { return _tableName; } }
+
+        protected BaseSqlDbMapper(string tableName)
+        {
+            _tableName = tableName;
+        }
+
+        public object GetIdentity(object entity)
+        {
+            if (Mapper.IdentityField != null)
+                return Mapper.IdentityField.Getter(entity);
+            return null;
+        }
+
+        public string IdentityName
+        {
+            get
+            {
+                return Mapper.IdentityField?.Name;
+            }
+        }
+
+        #region QUERIES
+        #region INDEXES
+        public string GetIndexExistsQuery(IDbField field)
+        {
+            if (field.IsIndexed)
+            {
+                return string.Format(
+                    "SELECT COUNT(*) FROM sys.indexes WHERE name = 'idx_{0}_{1}' AND object_id = OBJECT_ID('{2}')",
+                    _tableName, field.Name, _tableName);
+            }
+            return null;
+        }
+
+        public string GetCreateIndexQuery(IDbField field)
+        {
+            if (field.IsIndexed)
+            {
+                return string.Format("CREATE INDEX idx_{0}_{1} ON [{2}]({3});", _tableName, field.Name, _tableName, field.Name);
+            }
+            return null;
+        }
+        #endregion
+
+        #region CREATE
+        public static HashSet<DbType> FieldsHasSize = new HashSet<DbType>
+        {
+            DbType.String, DbType.Decimal, DbType.AnsiString, DbType.AnsiStringFixedLength,
+            DbType.StringFixedLength, DbType.VarNumeric
+        };
+
+        private string _createString = null;
+        private readonly object _createStringBuildLocker = new object();
+        public string GetCreateQuery(bool rebuild = false)
+        {
+            lock (_createStringBuildLocker)
+            {
+                if (_createString == null || rebuild)
+                {
+                    StringBuilder create = new StringBuilder("CREATE TABLE [" + _tableName + "]");
+                    create.Append("(");
+                    Mapper.TraversalFields(f =>
+                    {
+                        var sqlType = DbTypeMapper.ToSqlDbType(f.ClrType);
+                        create.Append("[" + f.Name + "] " + sqlType);
+                        if (FieldsHasSize.Contains(f.DbType) && f.Size != 0)
+                        {
+                            if (f.DbType == DbType.Decimal)
+                            {
+                                int p = 19, s = 4;
+                                if (f.Size > 0)
+                                {
+                                    p = (int)f.Size;
+                                    if (s >= p)
+                                    {
+                                        if (p <= 2) s = 0;
+                                        else s = p - 1;
+                                    }
+                                }
+                                create.AppendFormat("({0},{1})", p, s);
+                            }
+                            else
+                            {
+                                create.AppendFormat("({0})", ((f.Size == -1) ? "max" : f.Size.ToString()));
+                            }
+                        }
+                        if (f.IsIdentity)
+                        {
+                            create.Append(" PRIMARY KEY");
+                        }
+                        if (f.AllowNull)
+                        {
+                            create.Append(" NULL");
+                        }
+                        else
+                        {
+                            create.Append(" NOT NULL");
+                        }
+                        if (f.AutoIncrement)
+                        {
+                            create.Append(" IDENTITY (0, 1)");
+                        }
+                        create.Append(",");
+                    });
+                    _createString = create.ToString().TrimEnd(',') + ")";
+                }
+            }
+            return _createString;
+        }
+        #endregion
+        #endregion
+
+        public SqlParameter[] CreateSqlDbParameters(object entity)
+        {
+            if (entity.GetType() != Mapper.EntityType)
+                throw new InvalidCastException("Entity type is different from serializer entity type");
+            var list = new List<SqlParameter>();
+            Mapper.TraversalFields(field => 
+            {
+                var par = new SqlParameter();
+                par.Value = ValueToSqlServerObject(field.Getter(entity), field.ClrType);
+                // ADO.NET bug
+                // https://connect.microsoft.com/VisualStudio/feedback/details/381934/sqlparameter-dbtype-dbtype-time-sets-the-parameter-to-sqldbtype-datetime-instead-of-sqldbtype-time
+                if (field.DbType == DbType.Time)
+                {
+                    par.SqlDbType = SqlDbType.Time;
+                }
+                else
+                {
+                    par.DbType = field.DbType; // Если задать в конструкторе, то тип может переопределиться при задании значения
+                }
+                par.ParameterName = field.Name;
+                list.Add(par);
+            });
+            return list.ToArray();
+        }
+
+        #region Datetime helper
+        private static DateTime MinSqlDbDateTimeValue = new DateTime(1753, 01, 01);
+
+        protected object ValueToSqlServerObject(object obj, Type type)
+        {
+            if (type == typeof(DateTime))
+            {
+                return DateTimeToSqlDbValue((DateTime)obj);
+            }
+            return obj ?? DBNull.Value;
+        }
+        /// <summary>
+        /// Подготовка даты к записи в SQLServer
+        /// (минимальные значения даты в .NET и SQL Server отличаются)
+        /// </summary>
+        protected object DateTimeToSqlDbValue(DateTime dt)
+        {
+            if (DateTime.Compare(dt, MinSqlDbDateTimeValue) <= 0)
+                return DBNull.Value;
+            return dt;
+        }
+        /// <summary>
+        /// Конвертер из элементов строки DataTable в DonNet тип
+        /// </summary>
+        /// <typeparam name="Tout">Тип на выходе</typeparam>
+        /// <param name="value">Значение из БД</param>
+        /// <returns>Результат</returns>
+        protected Tout Convert<Tout>(object value)
+        {
+            if (null == value || DBNull.Value == value)
+                return default(Tout);
+            return (Tout)System.Convert.ChangeType(value, typeof(Tout));
+        }
+        #endregion
+    }
+}

ZeroLevel.SqlServer/Contracts/BaseEntity.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace ZeroLevel.SqlServer
+{
+    [DataContract]
+    [Serializable]
+    public abstract class BaseEntity : IEntity
+    {
+        #region Properties
+        [DataMember]
+        [DbMember(false, true, false)]
+        public Guid Id
+        {
+            get;
+            set;
+        }
+        #endregion
+
+        #region Ctors
+        protected BaseEntity()
+        {
+            Id = Guid.NewGuid();
+        }
+        protected BaseEntity(Guid id)
+        {
+            if (id == Guid.Empty)
+                throw new ArgumentException("Entity id must not be empty");
+            Id = id;
+        }
+        protected BaseEntity(BaseEntity other)
+        {
+            if (other == null)
+                throw new ArgumentNullException(nameof(other));
+            Id = other.Id;
+        }
+        #endregion
+
+        public abstract object Clone();
+
+        #region Equal
+        public bool Equals(BaseEntity other)
+        {
+            if (this == null) // и так бывает
+                throw new NullReferenceException();
+            if (other == null)
+                return false;
+            if (ReferenceEquals(this, other))
+                return true;
+            if (this.GetType() != other.GetType())
+                return false;
+            return Id == other.Id;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (this == null)
+                throw new NullReferenceException();
+
+            return Equals(obj as BaseEntity);
+        }
+
+        public static bool operator ==(BaseEntity first, BaseEntity second) => Equals(first, second);
+        public static bool operator !=(BaseEntity first, BaseEntity second) => !Equals(first, second);
+        #endregion
+
+        public override int GetHashCode()
+        {
+            return Id.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/Contracts/BaseVersionedEntity.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace ZeroLevel.SqlServer
+{
+    [DataContract]
+    [Serializable]
+    public abstract class BaseVersionedEntity : BaseEntity, IVersionedEntity
+    {
+        #region Properties
+        [DataMember]
+        [DbMember(false)]
+        public long Version
+        {
+            get;
+            internal set;
+        }
+        #endregion
+
+        #region Ctors
+        protected BaseVersionedEntity()
+            : base()
+        {
+        }
+        // Конструктор protected BaseVersionedEntity(Guid id) исключен, т.к. без версии нет смысла создавать обхект с известным ID
+
+        protected BaseVersionedEntity(Guid id, long version)
+            : base(id)
+        {
+            Version = version;
+        }
+        protected BaseVersionedEntity(BaseVersionedEntity other)
+            : base(other)
+        {
+            Version = other.Version;
+        }
+        #endregion
+
+        public bool Equals(BaseVersionedEntity other)
+        {
+            if (base.Equals(other) == false) return false;
+            return Version == other.Version;
+        }
+
+        public override bool Equals(object obj)
+        {
+            return Equals(obj as BaseVersionedEntity);
+        }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/Contracts/DbIndexAttribute.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace ZeroLevel.SqlServer
+{
+    public class DbIndexAttribute : Attribute
+    {
+        public DbIndexAttribute() { }
+    }
+}

ZeroLevel.SqlServer/Contracts/DbMemberAttribute.cs

@@ -0,0 +1,39 @@
+using System;
+
+namespace ZeroLevel.SqlServer
+{
+    public class DbMemberAttribute : Attribute
+    {
+        #region Properties
+        public bool AllowNull { get; }
+        public bool AutoIncrement { get; }
+        public bool IsIdentity { get; }
+        public long Size { get; }
+        #endregion
+
+        #region Ctors
+        public DbMemberAttribute(bool allowNull)
+            : this(allowNull, -1, false, false) { }
+
+        public DbMemberAttribute(bool allowNull, long size)
+            : this(allowNull, size, false, false) { }
+
+        public DbMemberAttribute(bool allowNull, bool isIdentity)
+            : this(allowNull, -1, isIdentity, false) { }
+
+        public DbMemberAttribute(bool allowNull, bool isIdentity, bool autoIncrement)
+            : this(allowNull, -1, isIdentity, autoIncrement) { }
+
+        public DbMemberAttribute(bool allowNull, long size, bool isIdentity)
+            : this(allowNull, size, isIdentity, false) { }
+
+        public DbMemberAttribute(bool allowNull, long size, bool isIdentity, bool autoIncrement)
+        {
+            AllowNull = allowNull;
+            AutoIncrement = autoIncrement;
+            IsIdentity = isIdentity;
+            Size = size;
+        }
+        #endregion
+    }
+}

ZeroLevel.SqlServer/Contracts/IDbField.cs

@@ -0,0 +1,16 @@
+using System.Data;
+using ZeroLevel.Services.ObjectMapping;
+
+namespace ZeroLevel.SqlServer
+{
+    public interface IDbField:
+        IMemberInfo
+    {
+        bool AutoIncrement { get; }
+        bool IsIdentity { get; }
+        bool IsIndexed { get; }
+        bool AllowNull { get; }
+        long Size { get; }
+        DbType DbType { get; }
+    }
+}

ZeroLevel.SqlServer/Contracts/IDbMapper.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Data;
+using System.Data.Common;
+
+namespace ZeroLevel.SqlServer
+{
+    public interface IDbMapper
+    {
+        IDbField this[string name] { get; }
+        IDbField IdentityField { get; }
+        Type EntityType { get; }
+        object Id(object entity);
+        void TraversalFields(Action<IDbField> callback);
+        void TraversalFields(Func<IDbField, bool> callback);
+        void SetTypeConverter(Func<IDbField, object, object> converter);
+        bool Exists(string name);
+
+        #region Serialization
+        object Deserialize(DataRow row);
+        object Deserialize(DbDataReader reader);
+        #endregion
+    }
+
+    public interface IDbMapper<T> : IDbMapper
+    {
+        new T Deserialize(DataRow row);
+        new T Deserialize(DbDataReader reader);
+    }
+}

ZeroLevel.SqlServer/Contracts/IDbProvider.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.Common;
+
+namespace ZeroLevel.SqlServer
+{
+    public interface IDbProvider
+    {
+        bool ExistsTable(string tableName);
+        DataTable ExecuteQueryDataTable(string query);
+        DataTable ExecuteQueryDataTable(string query, DbParameter[] par);
+        DataSet ExecuteQuerySqlDataSet(string query);
+        DataSet ExecuteQuerySqlDataSet(string query, DbParameter[] par);
+        object ExecuteScalar(string query);
+        object ExecuteScalar(string query, DbParameter[] par);
+        void ExecuteNonResult(IEnumerable<ZSqlCommand> commands);
+        int ExecuteNonResult(string query);
+        int ExecuteNonResult(string query, DbParameter[] par);
+        void LazySelect(string query, DbParameter[] par, Func<DbDataReader, bool> readHandler);
+    }
+}

ZeroLevel.SqlServer/Contracts/IEntity.cs

@@ -0,0 +1,14 @@
+using System;
+
+namespace ZeroLevel.SqlServer
+{
+    public interface IEntity : ICloneable
+    {
+        Guid Id { get; }
+    }
+
+    public interface IEntity<TKey> : ICloneable
+    {
+        TKey Id { get; }
+    }
+}

ZeroLevel.SqlServer/Contracts/IVersionedEntity.cs

@@ -0,0 +1,7 @@
+namespace ZeroLevel.SqlServer
+{
+    public interface IVersionedEntity : IEntity
+    {
+        long Version { get; }
+    }
+}

ZeroLevel.SqlServer/Contracts/ZSqlCommand.cs

@@ -0,0 +1,10 @@
+using System.Data.Common;
+
+namespace ZeroLevel.SqlServer
+{
+    public class ZSqlCommand
+    {
+        public string Query;
+        public DbParameter[] Parameters;
+    }
+}

ZeroLevel.SqlServer/DDD/IdentitySpecification.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Runtime.Serialization;
+using ZeroLevel.Specification;
+
+namespace ZeroLevel.SqlServer
+{
+    [DataContract]
+    [Serializable]
+    public class IdentitySpecification<T> : BaseSpecification<T>
+        where T : IEntity
+    {
+        [DataMember]
+        protected Guid _id;
+
+        public IdentitySpecification(Guid id)
+        {
+            _id = id;
+        }
+
+        public override bool IsSatisfiedBy(T o)
+        {
+            return o.Id == _id;
+        }
+
+        public static ISpecification<T> Create(Guid id) { return new IdentitySpecification<T>(id); }
+        public static ISpecification<T> Create(IEntity entity) { return new IdentitySpecification<T>(entity.Id); }
+    }
+
+    [DataContract]
+    [Serializable]
+    public class IdentitySpecification<T, TKey> : BaseSpecification<T>
+    {
+        [DataMember]
+        private TKey _id;
+        private readonly IDbMapper<T> _mapper;
+
+        public IdentitySpecification(TKey id, bool poco)
+        {
+            _id = id;
+            _mapper = DbMapperFactory.Create<T>(poco);
+        }
+
+        public override bool IsSatisfiedBy(T o)
+        {
+            return _mapper.Id(o).Equals(_id);
+        }
+
+        public static ISpecification<T> Create(TKey id, bool poco) { return new IdentitySpecification<T, TKey>(id, poco); }
+    }
+}

ZeroLevel.SqlServer/DDD/SqlIdentitySpecification.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Data.SqlClient;
+using ZeroLevel.SqlServer;
+using ZeroLevel.Specification;
+
+namespace ZeroLevel.SqlServer
+{
+    public class SqlIdentitySpecification<T> : IdentitySpecification<T>, ISqlServerSpecification
+        where T : IEntity
+    {
+        public SqlIdentitySpecification(Guid id) : base(id)
+        {
+        }
+
+        public SqlParameter[] Parameters
+        {
+            get
+            {
+                return new SqlParameter[]
+                {
+                    new SqlParameter(DbMapperFactory.Create<T>().IdentityField.Name, _id)
+                };
+            }
+        }
+
+        public string Query
+        {
+            get
+            {
+                return string.Empty;
+            }
+        }
+
+        public static ISpecification<Te> Create<Te>(Guid id) where Te: IEntity
+        { return new SqlIdentitySpecification<Te>(id); }
+    }
+}

ZeroLevel.SqlServer/DbField.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Data;
+using System.Reflection;
+using ZeroLevel.Services.ObjectMapping;
+using ZeroLevel.Services.Reflection;
+
+namespace ZeroLevel.SqlServer
+{
+    public class DbField : MapMemberInfo, IDbField
+    {
+        public bool AutoIncrement { get; internal set; }
+        public bool IsIdentity { get; internal set; }
+        public bool IsIndexed { get; internal set; }
+        public bool AllowNull { get; internal set; }
+        public long Size { get; internal set; }
+        public DbType DbType { get; internal set; }
+
+        private DbField(Action<object, object> setter, Func<object, object> getter)
+            :base(setter, getter)
+        {
+        }
+
+        private static bool IsNullable(Type type)
+        {
+            if (!type.IsValueType) return true; // ref-type
+            if (Nullable.GetUnderlyingType(type) != null) return true; // Nullable<T>
+            return false; // value-type
+        }
+
+        public static DbField FromField(FieldInfo fieldInfo)
+        {
+            var meta = ((DbMemberAttribute)Attribute.GetCustomAttribute(fieldInfo, typeof(DbMemberAttribute)));
+            var index = ((DbIndexAttribute)Attribute.GetCustomAttribute(fieldInfo, typeof(DbIndexAttribute)));
+            var field = new DbField(TypeGetterSetterBuilder.BuildSetter(fieldInfo), TypeGetterSetterBuilder.BuildGetter(fieldInfo))
+            {
+                Name = fieldInfo.Name,
+                IsIdentity = meta?.IsIdentity ?? false,
+                AllowNull = meta?.AllowNull ?? true,
+                AutoIncrement = meta?.AutoIncrement ?? false,
+                Size = meta?.Size ?? -1,
+                IsIndexed = index != null
+            };
+            field.IsField = true;
+            var type = fieldInfo.FieldType;
+            field.ClrType = type;
+            field.DbType = type.ToDbType();
+            return field;
+        }
+
+        public static DbField FromProperty(PropertyInfo propertyInfo)
+        {
+            var meta = ((DbMemberAttribute)Attribute.GetCustomAttribute(propertyInfo, typeof(DbMemberAttribute)));
+            var index = ((DbIndexAttribute)Attribute.GetCustomAttribute(propertyInfo, typeof(DbIndexAttribute)));
+            var field = new DbField(TypeGetterSetterBuilder.BuildSetter(propertyInfo), TypeGetterSetterBuilder.BuildGetter(propertyInfo))
+            {
+                Name = propertyInfo.Name,
+                IsIdentity = meta?.IsIdentity ?? false,
+                AllowNull = meta?.AllowNull ?? true,
+                AutoIncrement = meta?.AutoIncrement ?? false,
+                Size = meta?.Size ?? -1,
+                IsIndexed = index != null
+            };
+            field.IsField = false;
+            var type = propertyInfo.PropertyType;
+            field.ClrType = type;
+            field.DbType = type.ToDbType();
+            return field;
+        }
+
+        public new static DbField FromMember(MemberInfo memberInfo)
+        {
+            switch (memberInfo.MemberType)
+            {
+                case MemberTypes.Field:
+                    return FromField(memberInfo as FieldInfo);
+                case MemberTypes.Property:
+                    return FromProperty(memberInfo as PropertyInfo);
+            }
+            return null;
+        }
+
+        public void SetValue(object instance, object dbvalue, Func<DbField, object, object> converter = null)
+        {
+            var value = (null == dbvalue || DBNull.Value == dbvalue) ? null : dbvalue;
+            if (null != converter)
+            {
+                value = converter(this, value);
+            }
+            if (null == value && false == IsNullable(ClrType))
+                Setter(instance, TypeExtensions.GetDefault(ClrType));
+            else
+                Setter(instance, value);
+        }
+
+    }
+}

ZeroLevel.SqlServer/DbMapper.cs

@@ -0,0 +1,169 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.Common;
+using System.Linq;
+using System.Reflection;
+
+namespace ZeroLevel.SqlServer
+{
+    public class DbMapper: IDbMapper
+    {
+        protected readonly Dictionary<string, DbField> _fields = new Dictionary<string, DbField>();
+        private string _identityFieldName;
+        private readonly Type _entityType;
+        /// <summary>
+        /// В случае задания в true, все поля класса считаются данными модели, в т.ч. не отвеченные аттрибутом DbMember
+        /// </summary>
+        private readonly bool _analizeAsPoco;
+        protected Func<DbField, object, object> typeConverter;
+
+        public void SetTypeConverter(Func<IDbField, object, object> converter)
+        {
+            typeConverter = converter;
+        }
+
+        public IDbField IdentityField
+        {
+            get
+            {
+                if (false == string.IsNullOrWhiteSpace(_identityFieldName))
+                {
+                    return _fields[_identityFieldName];
+                }
+                return null;
+            }
+        }
+
+        public Type EntityType
+        {
+            get
+            {
+                return _entityType;
+            }
+        }
+
+        public IDbField this[string name]
+        {
+            get
+            {
+                return _fields[name];
+            }
+        }
+
+        public object Id(object entity)
+        {
+            return IdentityField?.Getter(entity);
+        }
+
+        internal DbMapper(Type entityType, bool as_poco)
+        {
+            _analizeAsPoco = as_poco;
+            _entityType = entityType;
+            BuildMapping();
+        }
+
+        private void BuildMapping()
+        {
+            _entityType.GetMembers(
+                BindingFlags.Public |
+                BindingFlags.FlattenHierarchy |
+                BindingFlags.GetField |
+                BindingFlags.GetProperty |
+                BindingFlags.Instance).
+                Do(members =>
+                {
+                    IEnumerable<MemberInfo> memberList;
+                    if (false == _analizeAsPoco)
+                    {
+                        memberList = members.Where(m => null != Attribute.GetCustomAttribute(m, typeof(DbMemberAttribute)));
+                    }
+                    else
+                    {
+                        memberList = members;
+                    }
+                    foreach (var member in memberList)
+                    {
+                        if (member.MemberType != MemberTypes.Field && member.MemberType != MemberTypes.Property)
+                            continue;
+                        var field = DbField.FromMember(member);
+                        if (field.IsIdentity)
+                        {
+                            _identityFieldName = member.Name;
+                        }
+                        _fields.Add(field.Name, field);
+                    }
+                    if (true == string.IsNullOrWhiteSpace(_identityFieldName))
+                    {
+                        _identityFieldName = _fields.Keys.FirstOrDefault(f => f.Equals("id", StringComparison.OrdinalIgnoreCase));
+                        if (true == string.IsNullOrWhiteSpace(_identityFieldName))
+                        {
+                            _identityFieldName = _fields.Keys.FirstOrDefault(f =>
+                                f.IndexOf("id", StringComparison.OrdinalIgnoreCase) >= 0 &&
+                                f.IndexOf(_entityType.Name, StringComparison.OrdinalIgnoreCase) >= 0);
+                        }
+                    }
+                    if (false == string.IsNullOrWhiteSpace(_identityFieldName))
+                    {
+                        _fields[_identityFieldName].IsIdentity = true;
+                        _fields[_identityFieldName].AllowNull = false;
+                    }
+                });
+        }
+
+        public void TraversalFields(Action<IDbField> callback)
+        {
+            foreach (var f in _fields) callback(f.Value);
+        }
+
+        public void TraversalFields(Func<IDbField, bool> callback)
+        {
+            foreach (var f in _fields) if (false == callback(f.Value)) return;
+        }
+
+        public bool Exists(string name)
+        {
+            return _fields.ContainsKey(name);
+        }
+
+        #region Serialization
+        public object Deserialize(DataRow row)
+        {
+            if (null == row) throw new ArgumentNullException(nameof(row));
+            var result = Activator.CreateInstance(_entityType);
+            foreach (var field in _fields)
+            {
+                var value = (null == row[field.Key] || DBNull.Value == row[field.Key]) ? null : row[field.Key];
+                if (null != typeConverter)
+                {
+                    field.Value.Setter(result, typeConverter(field.Value, value));
+                }
+                else
+                {
+                    field.Value.Setter(result, value);
+                }
+            }
+            return result;
+        }
+
+        public object Deserialize(DbDataReader reader)
+        {
+            if (null == reader) throw new ArgumentNullException(nameof(reader));
+            var result = Activator.CreateInstance(_entityType);
+            foreach (var field in _fields)
+            {
+                var value = (null == reader[field.Key] || DBNull.Value == reader[field.Key]) ? null : reader[field.Key];
+                if (null != typeConverter)
+                {
+                    field.Value.Setter(result, typeConverter(field.Value, value));
+                }
+                else
+                {
+                    field.Value.Setter(result, value);
+                }
+            }
+            return result;
+        }
+        #endregion
+    }
+}

ZeroLevel.SqlServer/DbMapperFactory.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+
+namespace ZeroLevel.SqlServer
+{
+    public static class DbMapperFactory
+    {
+        private static readonly Dictionary<Type, IDbMapper> _mapperPool = new Dictionary<Type, IDbMapper>();
+        private static readonly object _poolLocker = new object();
+        /// <summary>
+        /// Создание маппера
+        /// </summary>
+        /// <param name="entityType">Тип представляющий модель данных</param>
+        /// <param name="asPoco">В случае задания в true, все поля класса считаются данными модели, в т.ч. не отвеченные аттрибутом DbMember</param>
+        /// <returns>Маппер</returns>
+        public static IDbMapper Create(Type entityType, bool asPoco = false)
+        {
+            if (null == entityType)
+                throw new ArgumentNullException(nameof(entityType));
+            lock (_poolLocker)
+            {
+                if (false == _mapperPool.ContainsKey(entityType))
+                {
+                    var gt = typeof(IDbMapper<>);
+                    var rt = gt.MakeGenericType(new Type[] { entityType });
+
+                    _mapperPool.Add(entityType, new DbMapper(rt, asPoco));
+                }
+            }
+            return _mapperPool[entityType];
+        }
+        /// <summary>
+        /// Создание маппера
+        /// </summary>
+        /// <param name="asPoco">В случае задания в true, все поля класса считаются данными модели, в т.ч. не отвеченные аттрибутом DbMember</param>
+        /// <returns>Маппер</returns>
+        public static IDbMapper<T> Create<T>(bool asPoco = false)
+        {
+            var entityType = typeof(T);
+            lock (_poolLocker)
+            {
+                if (false == _mapperPool.ContainsKey(entityType))
+                {
+                    _mapperPool.Add(entityType, new DbMapper<T>(asPoco));
+                }
+            }
+            return (IDbMapper<T>)_mapperPool[entityType];
+        }
+    }
+}

ZeroLevel.SqlServer/DbTypeMapper.cs

@@ -0,0 +1,175 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.SqlClient;
+
+namespace ZeroLevel.SqlServer
+{
+    public static class DbTypeMapper
+    {
+        static Dictionary<Type, DbType> typeMap;
+
+        static DbTypeMapper()
+        {
+            typeMap = new Dictionary<Type, DbType>
+            {
+                [typeof(byte)] = DbType.Byte,
+                [typeof(sbyte)] = DbType.SByte,
+                [typeof(short)] = DbType.Int16,
+                [typeof(ushort)] = DbType.UInt16,
+                [typeof(int)] = DbType.Int32,
+                [typeof(uint)] = DbType.UInt32,
+                [typeof(long)] = DbType.Int64,
+                [typeof(ulong)] = DbType.UInt64,
+                [typeof(float)] = DbType.Single,
+                [typeof(double)] = DbType.Double,
+                [typeof(decimal)] = DbType.Decimal,
+                [typeof(bool)] = DbType.Boolean,
+                [typeof(string)] = DbType.String,
+                [typeof(char)] = DbType.StringFixedLength,
+                [typeof(Guid)] = DbType.Guid,
+                [typeof(DateTime)] = DbType.DateTime,
+                [typeof(DateTimeOffset)] = DbType.DateTimeOffset,
+                [typeof(TimeSpan)] = DbType.Time,
+                [typeof(byte[])] = DbType.Binary,
+                [typeof(byte?)] = DbType.Byte,
+                [typeof(sbyte?)] = DbType.SByte,
+                [typeof(short?)] = DbType.Int16,
+                [typeof(ushort?)] = DbType.UInt16,
+                [typeof(int?)] = DbType.Int32,
+                [typeof(uint?)] = DbType.UInt32,
+                [typeof(long?)] = DbType.Int64,
+                [typeof(ulong?)] = DbType.UInt64,
+                [typeof(float?)] = DbType.Single,
+                [typeof(double?)] = DbType.Double,
+                [typeof(decimal?)] = DbType.Decimal,
+                [typeof(bool?)] = DbType.Boolean,
+                [typeof(char?)] = DbType.StringFixedLength,
+                [typeof(Guid?)] = DbType.Guid,
+                [typeof(DateTime?)] = DbType.DateTime,
+                [typeof(DateTimeOffset?)] = DbType.DateTimeOffset,
+                [typeof(TimeSpan?)] = DbType.Time,
+                [typeof(object)] = DbType.Object
+            };
+        }
+
+        /// <summary>
+        /// Для value типов помеченных как Nullable вытаскивает оригинальный value тип
+        /// Не value и не nullable типы не преобразуются
+        /// </summary>
+        private static Type GetNonNullableType(Type t)
+        {
+            if (t.IsValueType)
+            {
+                // Detect Nullable<T>
+                if (Nullable.GetUnderlyingType(t) != null)
+                {
+                    return t.GenericTypeArguments.Length > 0 ? t.GenericTypeArguments[0] : t;
+                }
+            }
+            return t;
+        }
+
+        public static DbType ToDbType(this Type type)
+        {
+            DbType dbType;
+            var theType = GetNonNullableType(type);
+            if (theType.IsEnum && !typeMap.ContainsKey(type))
+            {
+                theType = Enum.GetUnderlyingType(theType);
+            }
+            if (typeMap.TryGetValue(theType, out dbType))
+            {
+                return dbType;
+            }
+            return DbType.Object;
+        }
+
+        public static SqlDbType ToSqlDbType(this Type testType)
+        {
+            var theType = GetNonNullableType(testType);
+            if (theType.IsEnum)
+            {
+                return Enum.GetUnderlyingType(theType).ToSqlDbType();
+            }
+            if (theType == typeof(Byte[]) || theType == typeof(byte[])) return SqlDbType.Image;
+            if (theType == typeof(UInt16) || theType == typeof(ushort)) return SqlDbType.Int;
+            if (theType == typeof(UInt32) || theType == typeof(uint)) return SqlDbType.BigInt;
+            if (theType == typeof(UInt64) || theType == typeof(ulong)) return SqlDbType.Decimal;
+            if (theType == typeof(TimeSpan)) return SqlDbType.Time;
+            return new SqlParameter() { DbType = (DbType)Enum.Parse(typeof(DbType), theType.Name) }.SqlDbType;
+        }
+
+        public static Type ToClrType(string sqlType)
+        {
+            switch (sqlType.Trim().ToLowerInvariant())
+            {
+                case "bigint":
+                    return typeof(long);
+
+                case "binary":
+                case "image":
+                case "timestamp":
+                case "varbinary":
+                    return typeof(byte[]);
+
+                case "bit":
+                    return typeof(bool);
+
+                case "char":
+                case "nchar":
+                case "ntext":
+                case "nvarchar":
+                case "text":
+                case "varchar":
+                case "xml":
+                    return typeof(string);
+
+                case "datetime":
+                case "smalldatetime":
+                case "date":
+                case "datetime2":
+                    return typeof(DateTime);
+
+                case "time":
+                    return typeof(TimeSpan);
+
+                case "decimal":
+                case "money":
+                case "smallmoney":
+                    return typeof(decimal);
+
+                case "float":
+                    return typeof(double);
+
+                case "int":
+                    return typeof(int);
+
+                case "real":
+                    return typeof(float);
+
+                case "uniqueidentifier":
+                    return typeof(Guid);
+
+                case "smallint":
+                    return typeof(short);
+
+                case "tinyint":
+                    return typeof(byte);
+
+                case "variant":
+                case "udt":
+                    return typeof(object);
+
+                case "structured":
+                    return typeof(DataTable);
+
+                case "datetimeoffset":
+                    return typeof(DateTimeOffset);
+
+                default:
+                    throw new ArgumentOutOfRangeException(sqlType);
+            }
+        }
+    }
+}

ZeroLevel.SqlServer/GenericDbMapper.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Data;
+using System.Data.Common;
+
+namespace ZeroLevel.SqlServer
+{
+    public class DbMapper<T> : DbMapper, IDbMapper<T>
+    {
+        public DbMapper(bool as_poco) : base(typeof(T), as_poco)
+        {
+        }
+
+        public new T Deserialize(DataRow row)
+        {
+            if (null == row) throw new ArgumentNullException(nameof(row));
+            var result = Activator.CreateInstance<T>();
+            foreach (var field in _fields)
+            {
+                field.Value.SetValue(result, row[field.Key], typeConverter);
+            }
+            return result;
+        }
+
+        public new T Deserialize(DbDataReader reader)
+        {
+            if (null == reader) throw new ArgumentNullException(nameof(reader));
+            var result = Activator.CreateInstance<T>();
+            foreach (var field in _fields)
+            {
+                field.Value.SetValue(result, reader[field.Key], typeConverter);
+            }
+            return result;
+        }
+    }
+}

ZeroLevel.SqlServer/GenericSqlDbMapper.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Data;
+using System.Data.Common;
+
+namespace ZeroLevel.SqlServer
+{
+    public class SqlDbMapper<T> : BaseSqlDbMapper
+    {
+        protected readonly IDbMapper<T> _mapper;
+
+        protected override IDbMapper Mapper
+        {
+            get
+            {
+                return _mapper;
+            }
+        }
+
+        public IDbField IdentityField
+        {
+            get
+            {
+                return _mapper.IdentityField;
+            }
+        }
+
+        public SqlDbMapper(bool entity_is_poco) : base(typeof(T).Name)
+        {
+            _mapper = DbMapperFactory.Create<T>(entity_is_poco);
+        }
+
+        public T Deserialize(DataRow row)
+        {
+            return _mapper.Deserialize(row);
+        }
+
+        public T Deserialize(DbDataReader reader)
+        {
+            return _mapper.Deserialize(reader);
+        }
+
+        public void TraversalFields(Action<IDbField> callback)
+        {
+            _mapper.TraversalFields(callback);
+        }
+    }
+}

ZeroLevel.SqlServer/ISqlServerSpecification.cs

@@ -0,0 +1,10 @@
+using System.Data.SqlClient;
+
+namespace ZeroLevel.SqlServer
+{
+    public interface ISqlServerSpecification
+    {
+        string Query { get; } 
+        SqlParameter[] Parameters { get; }
+    }
+}

ZeroLevel.SqlServer/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("ZeroLevel.SqlServer")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("ZeroLevel.SqlServer")]
+[assembly: AssemblyCopyright("Copyright ©  2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("a8ad956f-1559-45ec-a7db-42290494e2c5")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

ZeroLevel.SqlServer/SqlDbConnectionFactory.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Data.SqlClient;
+using System.Globalization;
+using System.Security.Permissions;
+
+namespace ZeroLevel.SqlServer
+{
+    public sealed class SqlDbConnectionFactory
+    {
+        public string ConnectionString
+        {
+            get { return dbConnectionString.ConnectionString; }
+        }
+
+        public string Server
+        {
+            get { return dbConnectionString.DataSource; }
+        }
+
+        public string Base
+        {
+            get { return dbConnectionString.InitialCatalog; }
+        }
+
+        #region Поля
+        private SqlConnectionStringBuilder dbConnectionString;
+        /// <summary>
+        /// Текущая строка подключения
+        /// </summary>
+        private readonly string _currentConnectionString = String.Empty;
+        #endregion
+
+        public SqlDbConnectionFactory(SqlConnectionStringBuilder builder)
+        {
+            _currentConnectionString = builder.ConnectionString;
+            Initialize();
+        }
+
+        public SqlDbConnectionFactory(string connectionString)
+        {
+            _currentConnectionString = connectionString;
+            Initialize();
+        }
+
+        public SqlDbConnectionFactory(string server, string database, string login, string password)
+        {
+            _currentConnectionString = BuildConnectionString(server, database, login, password);
+            Initialize();
+        }
+
+        private void Initialize()
+        {
+            try
+            {
+                var perm = new SqlClientPermission(PermissionState.Unrestricted);
+                perm.Demand();
+                perm = null;
+            }
+            catch
+            {
+                throw new ApplicationException("No permission for access to SqlClient");
+            }
+            dbConnectionString = new SqlConnectionStringBuilder(_currentConnectionString);
+            dbConnectionString.Pooling = true;
+            dbConnectionString.MaxPoolSize = 50;
+        }
+
+        public SqlConnection CreateConnection()
+        {
+            var connection = new SqlConnection(ConnectionString);
+            connection.Open();
+            return connection;
+        }
+
+        #region Helpers
+
+        #region Строки подключения
+        /// <summary>
+        /// Стандартное подключение
+        /// </summary>
+        private const string StandartConnectionString = "Server={0};Database={1};User ID={2};Password=\"{3}\";";
+        /// <summary>
+        /// Доверенное подключение
+        /// </summary>
+        private const string TrustedConnectionString = "Data Source={0};Initial Catalog={1};Integrated Security=SSPI;";
+        #endregion
+
+        internal static string BuildConnectionString(string server, string dataBase, string user, string pwd)
+        {
+            if (String.IsNullOrEmpty(user) || String.IsNullOrEmpty(pwd))
+            {
+                return String.Format(CultureInfo.CurrentCulture, TrustedConnectionString, server, dataBase);
+            }
+            else
+            {
+                return String.Format(CultureInfo.CurrentCulture, StandartConnectionString, server, dataBase, user, pwd);
+            }
+        }
+        #endregion
+
+        public override int GetHashCode()
+        {
+            return this.ConnectionString.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/SqlDbInfo.cs

@@ -0,0 +1,203 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Globalization;
+
+namespace ZeroLevel.SqlServer
+{
+    public sealed class SqlDbInfo
+    {
+        #region Ctor
+        public SqlDbInfo(SqlDbProvider provider)
+        {
+            _provider = provider;
+        }
+        #endregion
+
+        private static string FixTableName(string tableName)
+        {
+            return tableName.Trim().ToLower();
+        }
+
+        public void CollectDatabaseInfo(bool tables, bool views, bool storedProcedures)
+        {
+            if (tables)
+                CollectTableInformation();
+        }
+
+        public SqlDbTableInfo this[string tableName]
+        {
+            get
+            {
+                tableName = FixTableName(tableName);
+                if (_tables.ContainsKey(tableName))
+                {
+                    return _tables[tableName];
+                }
+                throw new KeyNotFoundException("Таблица " + tableName + " отсутствует в базе " + _provider.Server + "\\" + _provider.Base);
+            }
+        }
+
+        #region Private Fields
+        private readonly SqlDbProvider _provider;
+        private readonly Dictionary<string, SqlDbTableInfo> _tables = new Dictionary<string, SqlDbTableInfo>();
+        private readonly List<SqlDbForeignKeyInfo> _foreignKeys = new List<SqlDbForeignKeyInfo>();
+        private readonly List<SqlDbPrimaryKeyInfo> _primaryKeys = new List<SqlDbPrimaryKeyInfo>();
+        private readonly List<SqlDbObjectInfo> _storedProcedures = new List<SqlDbObjectInfo>();
+        private readonly List<SqlDbObjectInfo> _views = new List<SqlDbObjectInfo>();
+        #endregion
+
+        #region Public database info
+        public IEnumerable<string> Tables
+        {
+            get
+            {
+                return _tables.Keys;
+            }
+        }
+
+        public IEnumerable<SqlDbTableInfo> TablesInfo
+        {
+            get
+            {
+                return _tables.Values;
+            }
+        }
+
+        public IEnumerable<SqlDbPrimaryKeyInfo> PrimaryKeys
+        {
+            get
+            {
+                return _primaryKeys;
+            }
+        }
+
+        public IEnumerable<SqlDbForeignKeyInfo> ForeignKeys
+        {
+            get
+            {
+                return _foreignKeys;
+            }
+        }
+
+        public IEnumerable<SqlDbObjectInfo> StoredProcedures
+        {
+            get
+            {
+                return _storedProcedures;
+            }
+        }
+
+        public IEnumerable<SqlDbObjectInfo> Views
+        {
+            get
+            {
+                return _views;
+            }
+        }
+        #endregion
+
+        #region Public methods
+        public bool ContainTable(string tableName)
+        {
+            tableName = FixTableName(tableName);
+            return _tables.ContainsKey(tableName);
+        }
+
+        public bool ContainPrimaryKey(SqlDbPrimaryKeyInfo pk)
+        {
+            return _primaryKeys.Contains(pk);
+        }
+
+        public bool ContainForeignKey(SqlDbForeignKeyInfo fk)
+        {
+            return _foreignKeys.Contains(fk);
+        }
+
+        public SqlDbTableInfo TableInfo(string tableName)
+        {
+            tableName = FixTableName(tableName);
+            if (ContainTable(tableName))
+            {
+                return _tables[tableName];
+            }
+            return null;
+        }
+        #endregion
+
+        #region Helpers
+        /// <summary>
+        /// Сбор информации о таблицах, перчиных и внешних ключах
+        /// </summary>
+        private void CollectTableInformation()
+        {
+            // Таблицы
+            foreach (string table in GetTables())
+            {
+                SqlDbTableInfo info = GetTableInfo(table);
+                if (info != null)
+                {
+                    string tableName = FixTableName(info.Name);
+                    _tables.Add(tableName, info);
+                    if (info.PrimaryKey != null)
+                    {
+                        _primaryKeys.Add(new SqlDbPrimaryKeyInfo { PrimaryKeyTable = tableName, PrimaryKeyColumn = info.PrimaryKey.Name });
+                    }
+                }
+            }
+            // Внешние ключи
+            DataSet fkSet = _provider.ExecuteQuerySqlDataSet(SqlDbForeignKeyInfo.ForeignKeySelectQuery);
+            if (fkSet != null && fkSet.Tables.Count > 0)
+            {
+                foreach (DataRow row in fkSet.Tables[0].Rows)
+                {
+                    _foreignKeys.Add(new SqlDbForeignKeyInfo
+                    {
+                        ForeignKeyName = Convert.ToString(row["Constraint_Name"], CultureInfo.CurrentCulture),
+                        ForeignKeyTable = FixTableName(Convert.ToString(row["K_Table"], CultureInfo.CurrentCulture)),
+                        ForeignKeyColumn = Convert.ToString(row["FK_Column"], CultureInfo.CurrentCulture),
+                        PrimaryKeyTable = FixTableName(Convert.ToString(row["PK_Table"], CultureInfo.CurrentCulture)),
+                        PrimaryKeyColumn = Convert.ToString(row["PK_Column"], CultureInfo.CurrentCulture)
+                    });
+                }
+            }
+        }
+        #region Private
+        /// <summary>
+        /// Получение списка таблиц из базы данных
+        /// </summary>
+        private List<string> GetTables()
+        {
+            var tables = new List<string>();
+            using (DataSet ds = _provider.ExecuteQuerySqlDataSet("exec sp_tables"))
+            {
+                if (ds != null && ds.Tables.Count > 0)
+                {
+                    foreach (DataRow row in ds.Tables[0].Rows)
+                    {
+                        if (String.Equals(row.ItemArray[3].ToString(), "TABLE", StringComparison.OrdinalIgnoreCase) &&
+                            (false == String.Equals(row.ItemArray[1].ToString(), "sys", StringComparison.OrdinalIgnoreCase)))
+                            tables.Add(FixTableName(row.ItemArray[2].ToString()));
+                    }
+                }
+            }
+            return tables;
+        }
+        /// <summary>
+        /// Получение информации о таблице по ее имени
+        /// </summary>
+        public SqlDbTableInfo GetTableInfo(string table)
+        {
+            if (String.IsNullOrEmpty(table))
+            {
+                throw new ArgumentNullException("table");
+            }
+            var info = new SqlDbTableInfo(FixTableName(table));
+            info.FillTableInfo(_provider);
+            return info;
+        }
+        #endregion
+
+        #endregion
+    }
+}

ZeroLevel.SqlServer/SqlDbMapper.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Data;
+
+namespace ZeroLevel.SqlServer
+{
+    public class SqlDbMapper : BaseSqlDbMapper
+    {
+        protected readonly IDbMapper _mapper;
+
+        protected override IDbMapper Mapper
+        {
+            get
+            {
+                return _mapper;
+            }
+        }
+
+        public SqlDbMapper(Type entityType, bool as_poco = false) : base(entityType.Name)
+        {
+            _mapper = DbMapperFactory.Create(entityType, as_poco);
+        }
+
+        public object Deserialize(DataRow row)
+        {
+            return _mapper.Deserialize(row);
+        }
+    }
+}

ZeroLevel.SqlServer/SqlDbProvider.cs

@@ -0,0 +1,370 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.Common;
+using System.Data.SqlClient;
+
+namespace ZeroLevel.SqlServer
+{
+    public class SqlDbProvider :
+        IDbProvider
+    {
+        #region Fields
+        private readonly SqlDbConnectionFactory _factory;
+        private const int Timeout = 60000;
+
+        public string ConnectionString
+        {
+            get { return _factory.ConnectionString; }
+        }
+
+        public string Server
+        {
+            get { return _factory.Server; }
+        }
+
+        public string Base
+        {
+            get { return _factory.Base; }
+        }
+        #endregion
+
+        #region .Ctor
+        /// <summary>
+        /// Конструктор.
+        /// </summary>
+        public SqlDbProvider(SqlDbConnectionFactory factory)
+        {
+            _factory = factory;
+        }
+        #endregion
+
+        #region ExecuteNonResult       
+        public void ExecuteNonResult(IEnumerable<ZSqlCommand> commands)
+        {
+            using (DbConnection connection = _factory.CreateConnection())
+            {
+                foreach (var zcmd in commands)
+                {
+                    using (var cmd = CreateCommand(connection, zcmd.Query, zcmd.Parameters, Timeout))
+                    {
+                        cmd.ExecuteNonQuery();
+                    }
+                }
+            }
+        }
+
+        public int ExecuteNonResult(string query)
+        {
+            return ExecuteNonResult(query, null);
+        }
+
+        public int ExecuteNonResult(string query, DbParameter[] par)
+        {
+            using (DbConnection connection = _factory.CreateConnection())
+            {
+                using (var cmd = CreateCommand(connection, query, par, Timeout))
+                {
+                    return cmd.ExecuteNonQuery();
+                }
+            }
+        }
+
+        public T Insert<T>(string insert_query, SqlParameter[] par)
+        {
+            DbConnection connection = _factory.CreateConnection();
+            try
+            {
+                using (var cmd = CreateCommand(connection, insert_query, par, Timeout))
+                {
+                    var result = cmd.ExecuteScalar();
+                    return (T)result;
+                }
+            }
+            finally
+            {
+                connection.Dispose();
+            }
+        }
+        #endregion
+
+        #region ExecuteQueryDataTable
+        public DataTable ExecuteQueryDataTable(string query)
+        {
+            var ds = ExecuteQuerySqlDataSet(query);
+            if (ds != null && ds.Tables.Count > 0)
+            {
+                return ds.Tables[0];
+            }
+            return null;
+        }
+
+        public DataTable ExecuteQueryDataTable(string query, DbParameter[] par)
+        {
+            var ds = ExecuteQuerySqlDataSet(query, par);
+            if (ds != null && ds.Tables.Count > 0)
+            {
+                return ds.Tables[0];
+            }
+            return null;
+        }
+        #endregion
+
+        #region ExecuteQuerySqlDataSet
+        public DataSet ExecuteQuerySqlDataSet(string query)
+        {
+            var ds = new DataSet("DataSet");
+            using (var connection = _factory.CreateConnection())
+            {
+                using (var cmd = CreateCommand(connection, query, null, Timeout))
+                {
+                    using (var da = new SqlDataAdapter(cmd))
+                    {
+                        da.Fill(ds);
+                    }
+                }
+            }
+            return ds;
+        }
+
+        public DataSet ExecuteQuerySqlDataSet(string query, DbParameter[] par)
+        {
+            var ds = new DataSet("DataSet");
+            using (var connection = _factory.CreateConnection())
+            {
+                using (var cmd = CreateCommand(connection, query, par, Timeout))
+                {
+                    using (var da = new SqlDataAdapter(cmd))
+                    {
+                        da.Fill(ds);
+                    }
+                }
+            }
+            return ds;
+        }
+        #endregion
+
+        #region ExecuteScalar
+        public object ExecuteScalar(string query)
+        {
+            using (var connection = _factory.CreateConnection())
+            {
+                using (var cmd = CreateCommand(connection, query, null, Timeout))
+                {
+                    return cmd.ExecuteScalar();
+                }
+            }
+        }
+
+        public object ExecuteScalar(string query, DbParameter[] par)
+        {
+            using (var connection = _factory.CreateConnection())
+            {
+                using (var cmd = CreateCommand(connection, query, par, Timeout))
+                {
+                    return cmd.ExecuteScalar();
+                }
+            }
+        }
+        #endregion
+
+        #region ExecuteStoredProcedure
+        public int ExecProcedure(string name)
+        {
+            using (var connection = _factory.CreateConnection())
+            {
+                using (var command = new SqlCommand(name, connection)
+                {
+                    CommandType = CommandType.StoredProcedure
+                })
+                {
+                    command.CommandTimeout = 300000;
+                    return command.ExecuteNonQuery();
+                }
+            }
+        }
+        #endregion
+
+        #region LazySelect
+        public void LazySelect(string query, DbParameter[] par, Func<DbDataReader, bool> readHandler)
+        {
+            using (var connection = _factory.CreateConnection())
+            {
+                using (var cmd = CreateCommand(connection, query, par, Timeout))
+                {
+                    using (SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection))
+                    {
+                        try
+                        {
+                            while (reader.Read())
+                            {
+                                if (false == readHandler(reader))
+                                    break;
+                            }
+                        }
+                        catch (Exception ex)
+                        {
+                            Log.Error(ex, "Error executing query {0}.", cmd.CommandText);
+                        }
+                        finally
+                        {
+                            // Always call Close when done reading.
+                            reader.Close();
+                        }
+                    }
+                }
+            }
+        }
+        #endregion
+
+        #region ExistsTable
+        private const string QueryExistsTable = @"IF OBJECT_ID (N'[{0}]', N'U') IS NOT NULL SELECT 1 AS res ELSE SELECT 0 AS res";
+        public bool ExistsTable(string tableName)
+        {
+            return Convert.ToInt32(ExecuteScalar(String.Format(QueryExistsTable, tableName))) == 1;
+        }
+        #endregion
+
+        #region Commands
+        private static SqlParameter[] ProcessParameters(DbParameter[] par)
+        {
+            if (par != null)
+            {
+                var result = new SqlParameter[par.Length];
+                for (int i = 0; i < par.Length; i++)
+                {
+                    if (par[i] is SqlParameter)
+                    {
+                        result[i] = (SqlParameter)par[i];
+                    }
+                    else
+                    {
+                        result[i] = new SqlParameter(par[i].ParameterName,
+                            par[i].Value ?? DBNull.Value);
+                        result[i].Size = par[i].Size;
+                    }
+                }
+                return result;
+            }
+            return new SqlParameter[0];
+        }
+
+        private static SqlCommand CreateCommand(DbConnection connection, string query, DbParameter[] parameters, int timeout)
+        {
+            var command = connection.CreateCommand();
+            command.CommandText = query;
+            command.CommandType = CommandType.Text;
+            if (timeout > 0)
+                command.CommandTimeout = timeout;
+            if (parameters != null && parameters.Length > 0)
+                command.Parameters.AddRange(ProcessParameters(parameters));
+            return (SqlCommand)command;
+
+        }
+        #endregion
+
+        #region SQL Server execute plan reset
+        private const string CLEAN_PLAN_CACHEE_QUERY = "DBCC FREEPROCCACHE WITH NO_INFOMSGS;";
+        /// <summary>
+        /// Выполняет удаление всех элементов из кэша планов.
+        /// Применимо для ускорения работы SQL Server, при очистке кэша создаются новые планы
+        /// исполнения для новых значений запросов.
+        /// </summary>
+        public void CleanPlanCachee()
+        {
+            using (var connection = _factory.CreateConnection())
+            {
+                using (var cmd = CreateCommand(connection, CLEAN_PLAN_CACHEE_QUERY,
+                    null, Timeout))
+                {
+                    cmd.ExecuteNonQuery();
+                }
+            }
+        }
+        #endregion
+
+        #region Static methods        
+        /// <summary>
+        /// Создает базу данных
+        /// </summary>
+        /// <param name="server">Сервер</param>
+        /// <param name="database">Название базы данных</param>
+        public static void CreateDatabase(string server, string database, string login, string password)
+        {
+            if (string.IsNullOrEmpty(server))
+            {
+                throw new ArgumentException("Не указано имя сервера");
+            }
+            if (string.IsNullOrEmpty(database))
+            {
+                throw new ArgumentException("Не указано имя базы данных");
+            }
+            using (var connection = new SqlConnection(SqlDbConnectionFactory.BuildConnectionString(server, "master", login, password)))
+            {
+                connection.Open();
+                using (var command = connection.CreateCommand())
+                {
+                    command.CommandText = String.Format("CREATE DATABASE {0}", database);
+                    command.ExecuteNonQuery();
+                }
+            }
+        }
+        /// <summary>
+        /// Выполняет проверку существования базы данных с указанным именем
+        /// </summary>
+        public static bool CheckDatabaseExists(string serverName, string databaseName)
+        {
+            string sqlExistsDBQuery;
+            bool result = false;
+            try
+            {
+                using (var tmpConn = new SqlConnection(String.Format("server={0};Trusted_Connection=yes", serverName)))
+                {
+                    tmpConn.Open();
+                    sqlExistsDBQuery = string.Format("SELECT database_id FROM sys.databases WHERE Name = '{0}'", databaseName);
+                    using (SqlCommand sqlCmd = new SqlCommand(sqlExistsDBQuery, tmpConn))
+                    {
+                        object resultObj = sqlCmd.ExecuteScalar();
+                        int databaseID = 0;
+                        if (resultObj != null)
+                        {
+                            int.TryParse(resultObj.ToString(), out databaseID);
+                        }
+                        result = (databaseID > 0);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Log.Error(ex, "Сбой при попытке подключения к серверу {0} и проверке наличия базы данных {1}",
+                    serverName, databaseName);
+                result = false;
+            }
+            return result;
+        }
+        /// <summary>
+        /// Удаляет базу данных
+        /// </summary>
+        public static void DropDatabase(string server, string database, string login, string password)
+        {
+            if (string.IsNullOrEmpty(server))
+            {
+                throw new ArgumentException("Не указано имя сервера");
+            }
+            if (string.IsNullOrEmpty(database))
+            {
+                throw new ArgumentException("Не указано имя базы данных");
+            }
+            using (var connection = new SqlConnection(SqlDbConnectionFactory.BuildConnectionString(server, "master", login, password)))
+            {
+                connection.Open();
+                using (var command = connection.CreateCommand())
+                {
+                    command.CommandText = String.Format("ALTER DATABASE {0} SET SINGLE_USER WITH ROLLBACK IMMEDIATE;\r\nDROP DATABASE [{1}]", database, database);
+                    command.ExecuteNonQuery();
+                }
+            }
+        }
+        #endregion
+    }
+}

ZeroLevel.SqlServer/SqlDbRepository.cs

@@ -0,0 +1,510 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.SqlClient;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using ZeroLevel.Specification;
+
+namespace ZeroLevel.SqlServer
+{
+    public class SqlDbRepository<T>
+    {
+        #region Fields
+        private readonly SqlDbMapper<T> _mapper;
+        private readonly SqlDbProvider _dbProvider;
+        #endregion
+
+        #region Ctors
+        public SqlDbRepository(SqlDbConnectionFactory connectionFactory, bool entity_is_poco = false)
+        {
+            _mapper = new SqlDbMapper<T>(entity_is_poco);
+            _dbProvider = new SqlDbProvider(connectionFactory);
+            if (false == SqlDbProvider.CheckDatabaseExists(connectionFactory.Server, connectionFactory.Base))
+            {
+                SqlDbProvider.CreateDatabase(connectionFactory.Server, connectionFactory.Base, null, null);
+                Thread.Sleep(5000);
+            }
+            VerifyDb();
+            Prebuilt();
+        }
+
+        public SqlDbRepository(string connectionString)
+            : this(new SqlDbConnectionFactory(connectionString))
+        {
+        }
+
+        public SqlDbRepository(string server, string database)
+            : this(new SqlDbConnectionFactory(server, database, null, null))
+        {
+        }
+        #endregion
+
+        #region Simple queries
+        public IEnumerable<T> Get()
+        {
+            using (var table = _dbProvider.ExecuteQueryDataTable(_getAllQuery))
+            {
+                return ConvertToEntitySet(table);
+            }
+        }
+
+        public T GetById<TId>(TId id)
+        {
+            if (null == id)
+                throw new ArgumentNullException(nameof(id));
+            using (var table = _dbProvider.ExecuteQueryDataTable(_getByIdQuery, new SqlParameter[]
+            {
+                new SqlParameter(_mapper.IdentityName, id)
+            }))
+            {
+                if (null != table && table.Rows.Count > 0)
+                {
+                    return _mapper.Deserialize(table.Rows[0]);
+                }
+            }
+            throw new KeyNotFoundException(string.Format("Not found db record by identity field '{0}' with value {1}",
+                _mapper.IdentityName, id));
+        }
+
+        public IEnumerable<T> Get<TField>(string fieldName, TField value)
+        {
+            if (null == value)
+                throw new ArgumentNullException(nameof(value));
+            if (string.IsNullOrWhiteSpace(fieldName))
+                throw new ArgumentNullException(nameof(fieldName));
+            var query = string.Format(_getByFieldNameQuery, fieldName, fieldName);
+            using (var table = _dbProvider.ExecuteQueryDataTable(query, new SqlParameter[]
+            {
+                new SqlParameter(fieldName, value)
+            }))
+            {
+                return ConvertToEntitySet(table);
+            }
+        }
+
+        public long Count()
+        {
+            object count = _dbProvider.ExecuteScalar(_countQuery);
+            if (null == count)
+                throw new InvalidOperationException(String.Format("Fault execute count query {0}", _countQuery));
+            return Convert.ToInt64(count);
+        }
+
+        public long Count<TField>(string fieldName, TField value)
+        {
+            if (null == value)
+                throw new ArgumentNullException(nameof(value));
+            if (string.IsNullOrWhiteSpace(fieldName))
+                throw new ArgumentNullException(nameof(fieldName));
+            var query = string.Format(_countByFieldNameQuery, fieldName, fieldName);
+            object count = _dbProvider.ExecuteScalar(query, new SqlParameter[]
+            {
+                new SqlParameter(fieldName, value)
+            });
+            if (null == count) throw new InvalidOperationException(String.Format("Fault execute count query {0}", _countQuery));
+            return Convert.ToInt64(count);
+        }
+
+        public bool Contains(T entity)
+        {
+            if (null == entity)
+            {
+                throw new ArgumentNullException(nameof(entity));
+            }
+            var count = _dbProvider.ExecuteScalar(_containsQuery, _mapper.CreateSqlDbParameters(entity));
+            if (null == count) throw new InvalidOperationException(String.Format("Fault execute query {0}", _containsQuery));
+            return Convert.ToInt64(count) > 0;
+        }
+
+        public bool ContainsId<TId>(TId id)
+        {
+            return Count<TId>(_mapper.IdentityName, id) > 0;
+        }
+
+        public bool Contains<TField>(string fieldName, TField value)
+        {
+            return Count<TField>(fieldName, value) > 0;
+        }
+
+        public void Update(T entity)
+        {
+            if (null == entity)
+                throw new ArgumentNullException(nameof(entity));
+            _dbProvider.ExecuteNonResult(_updateQuery, _mapper.CreateSqlDbParameters(entity));
+        }
+
+        public void Insert(T entity)
+        {
+            if (null == entity)
+                throw new ArgumentNullException(nameof(entity));
+            _dbProvider.ExecuteNonResult(_insertQuery, _mapper.CreateSqlDbParameters(entity));
+        }
+
+        public void Insert(IEnumerable<T> entities)
+        {
+            if (null == entities)
+                throw new ArgumentNullException(nameof(entities));
+            var commandList =
+                entities.
+                Select(e => new ZSqlCommand { Query = _insertQuery, Parameters = _mapper.CreateSqlDbParameters(e) });
+            _dbProvider.ExecuteNonResult(commandList);
+        }
+
+        public void Update(IEnumerable<T> entities)
+        {
+            if (null == entities)
+                throw new ArgumentNullException(nameof(entities));
+            var commandList =
+                entities.
+                Select(e => new ZSqlCommand { Query = _updateQuery, Parameters = _mapper.CreateSqlDbParameters(e) });
+            _dbProvider.ExecuteNonResult(commandList);
+        }
+
+        public void Remove(T entity)
+        {
+            if (null == entity)
+                throw new ArgumentNullException(nameof(entity));
+            _dbProvider.ExecuteNonResult(_removeByIdQuery, new SqlParameter[]
+            {
+                new SqlParameter(_mapper.IdentityName, _mapper.GetIdentity(entity))
+            });
+        }
+
+        public void RemoveById<TId>(TId id)
+        {
+            if (null == id)
+                throw new ArgumentNullException(nameof(id));
+            _dbProvider.ExecuteNonResult(_removeByIdQuery, new SqlParameter[]
+            {
+                new SqlParameter(_mapper.IdentityName, id)
+            });
+        }
+
+        public void Remove<TField>(string fieldName, TField value)
+        {
+            if (string.IsNullOrWhiteSpace(fieldName))
+                throw new ArgumentNullException(nameof(fieldName));
+            if (null == value)
+                throw new ArgumentNullException(nameof(value));
+            var query = string.Format(_removeByFieldQuery, fieldName, fieldName);
+            _dbProvider.ExecuteNonResult(query, new SqlParameter[]
+            {
+                new SqlParameter(fieldName, value)
+            });
+        }
+        #endregion
+
+        #region Specification queries
+        public T SingleOrDefault(ISpecification<T> specification)
+        {
+            if (null == specification)
+                throw new ArgumentNullException(nameof(specification));
+            ISqlServerSpecification sqlSpecification;
+            if (true == TryGetWhere(specification, out sqlSpecification))
+            {
+                string query = null;
+                var where = BuildWherePart(sqlSpecification);
+                if (false == string.IsNullOrWhiteSpace(where))
+                {
+                    query = _getTopOneQuery + " WHERE " + where;
+                    using (var table = _dbProvider.ExecuteQueryDataTable(query, sqlSpecification.Parameters))
+                    {
+                        if (null != table && table.Rows.Count > 0)
+                        {
+                            return _mapper.Deserialize(table.Rows[0]);
+                        }
+                        return default(T);
+                    }
+                }
+            }
+            // No sql specification
+            T result = default(T);
+            _dbProvider.LazySelect(_getAllQuery, null, reader =>
+            {
+                var entity = _mapper.Deserialize(reader);
+                if (specification.IsSatisfiedBy(entity))
+                {
+                    result = entity;
+                    return false;
+                }
+                return true;
+            });
+            return result;
+        }
+
+        public IEnumerable<T> Get(ISpecification<T> specification)
+        {
+            if (null == specification)
+                throw new ArgumentNullException(nameof(specification));
+            ISqlServerSpecification sqlSpecification;
+            if (true == TryGetWhere(specification, out sqlSpecification))
+            {
+                string query = null;
+                var where = BuildWherePart(sqlSpecification);
+                if (false == string.IsNullOrWhiteSpace(where))
+                {
+                    query = _getAllQuery + " WHERE " + where;
+                    using (var ds = _dbProvider.ExecuteQuerySqlDataSet(query, sqlSpecification.Parameters))
+                    {
+                        return ConvertToEntitySet(ds.Tables[0]);
+                    }
+                }
+            }
+            // No sql specification
+            var result = new List<T>();
+            _dbProvider.LazySelect(_getAllQuery, null, reader =>
+            {
+                var entity = _mapper.Deserialize(reader);
+                if (specification.IsSatisfiedBy(entity))
+                {
+                    result.Add(entity);
+                }
+                return true;
+            });
+            return result;
+        }
+
+        public bool Contains(ISpecification<T> specification)
+        {
+            if (null == specification)
+                throw new ArgumentNullException(nameof(specification));
+            ISqlServerSpecification sqlSpecification;
+            if (true == TryGetWhere(specification, out sqlSpecification))
+            {
+                var where = BuildWherePart(sqlSpecification);
+                if (false == string.IsNullOrWhiteSpace(where))
+                {
+                    string query = String.Format("SELECT COUNT(*) FROM [{0}] WHERE {1}", _mapper.TableName, where);
+                    object count = _dbProvider.ExecuteScalar(query, sqlSpecification.Parameters);
+                    if (null == count) throw new InvalidOperationException(String.Format("Fault execute query {0}", query));
+                    return Convert.ToInt64(count) > 0;
+                }
+            }
+            bool result = false;
+            _dbProvider.LazySelect(_getAllQuery, null, reader =>
+            {
+                var entity = _mapper.Deserialize(reader);
+                if (specification.IsSatisfiedBy(entity))
+                {
+                    result = true;
+                    return false;
+                }
+                return true;
+            });
+            return result;
+        }
+
+        public long Count(ISpecification<T> specification)
+        {
+            if (null == specification)
+                throw new ArgumentNullException(nameof(specification));
+            ISqlServerSpecification sqlSpecification;
+            if (true == TryGetWhere(specification, out sqlSpecification))
+            {
+                var where = BuildWherePart(sqlSpecification);
+                object count = null;
+                if (false == string.IsNullOrWhiteSpace(where))
+                {
+                    count = _dbProvider.ExecuteScalar(String.Format("{0} WHERE {1}", _countQuery, where), sqlSpecification.Parameters);
+                }
+                if (null == count) throw new InvalidOperationException("Fault execute query");
+                if (DBNull.Value == count) return 0;
+                return Convert.ToInt64(count);
+            }
+            long result = 0;
+            _dbProvider.LazySelect(_getAllQuery, null, reader =>
+            {
+                var entity = _mapper.Deserialize(reader);
+                if (specification.IsSatisfiedBy(entity))
+                {
+                    result++;
+                }
+                return true;
+            });
+            return result;
+        }
+
+        public void Remove(ISpecification<T> specification)
+        {
+            if (null == specification)
+                throw new ArgumentNullException(nameof(specification));
+            ISqlServerSpecification sqlSpecification;
+            if (true == TryGetWhere(specification, out sqlSpecification))
+            {
+                var where = BuildWherePart(sqlSpecification);
+                if (false == string.IsNullOrWhiteSpace(where))
+                {
+                    string query = string.Format("DELETE FROM [{0}] WHERE {1}", _mapper.TableName, where);
+                    _dbProvider.ExecuteNonResult(query, sqlSpecification.Parameters);
+                    return;
+                }
+            }
+            _dbProvider.LazySelect(_getAllQuery, null, reader =>
+            {
+                var entity = _mapper.Deserialize(reader);
+                if (specification.IsSatisfiedBy(entity))
+                {
+                    Remove(entity);
+                }
+                return true;
+            });
+        }
+        #endregion
+
+        #region Helpers
+        private void VerifyDb()
+        {
+            if (false == _dbProvider.ExistsTable(_mapper.TableName))
+            {
+                _dbProvider.ExecuteNonResult(_mapper.GetCreateQuery());
+            }
+            _mapper.TraversalFields(f =>
+            {
+                if (f.IsIndexed)
+                {
+                    var existsQuery = _mapper.GetIndexExistsQuery(f);
+                    if ((int)_dbProvider.ExecuteScalar(existsQuery) == 0)
+                    {
+                        var createQuery = _mapper.GetCreateIndexQuery(f);
+                        _dbProvider.ExecuteNonResult(createQuery);
+                    }
+                }
+            });
+        }
+
+        private IEnumerable<T> ConvertToEntitySet(DataTable _dt)
+        {
+            var result = new List<T>();
+            _dt.Do(dt =>
+            {
+                foreach (DataRow row in dt.Rows)
+                {
+                    try
+                    {
+                        result.Add(_mapper.Deserialize(row));
+                    }
+                    catch (Exception ex)
+                    {
+                        throw new InvalidCastException("Repository convert entity from db record to object fault", ex);
+                    }
+                }
+            });
+            return result;
+        }
+
+        private bool TryGetWhere(ISpecification<T> originalSpecifiaction, out ISqlServerSpecification sqlSpecification)
+        {
+            sqlSpecification = (originalSpecifiaction as ISqlServerSpecification);
+            return sqlSpecification != null;
+        }
+
+        private string BuildWherePart(ISqlServerSpecification specification)
+        {
+            if (false == string.IsNullOrWhiteSpace(specification.Query))
+                return specification.Query;
+            else if (specification.Parameters != null)
+                return string.Join(" AND ", specification.Parameters.
+                Select(p => string.Format("[{0}] = @{1}", p.ParameterName, p.ParameterName)));
+            return null;
+        }
+        #endregion
+
+        #region Prebuild queries
+        private string _insertQuery;
+        private string _updateQuery;
+
+        private string _getTopOneQuery;
+        private string _getAllQuery;
+        private string _getByIdQuery;
+        private string _getByFieldNameQuery;
+
+        private string _countQuery;
+        private string _countByFieldNameQuery;
+
+        private string _containsQuery;
+
+        private string _removeByFieldQuery;
+        private string _removeByIdQuery;
+
+        private void Prebuilt()
+        {
+            _insertQuery = BuildInsertQuery();
+            _updateQuery = BuildUpdateQuery();
+
+            _getAllQuery = string.Format("SELECT * FROM [{0}]", _mapper.TableName);
+            _getTopOneQuery = string.Format("SELECT TOP (1) * FROM [{0}]", _mapper.TableName);
+            _getByIdQuery = string.Format("SELECT * FROM [{0}] WHERE {1}=@{2}",
+                _mapper.TableName, _mapper.IdentityName, _mapper.IdentityName);
+            _getByFieldNameQuery = _getAllQuery + " WHERE {0}=@{1}";
+            _countQuery = string.Format("SELECT COUNT(*) FROM [{0}]", _mapper.TableName);
+            _countByFieldNameQuery = _countQuery + " WHERE {0}=@{1}";
+            _containsQuery = BuildContainsQuery();
+            _removeByIdQuery = String.Format("DELETE FROM [{0}] WHERE [{1}] = @{2}",
+                            _mapper.TableName, _mapper.IdentityName, _mapper.IdentityName);
+            _removeByFieldQuery = String.Format("DELETE FROM [{0}] WHERE ", _mapper.TableName) + " [{0}] = @{1}";
+        }
+
+        private string BuildContainsQuery()
+        {
+            var query = new StringBuilder(_countQuery);
+            query.Append(" WHERE ");
+            _mapper.TraversalFields(f =>
+            {
+                query.AppendFormat("[{0}] = @{1} AND ", f.Name, f.Name);
+            });
+            if (StringExtensions.EndsWith(query, "AND ")) query.Remove(query.Length - 4, 4);
+            if (StringExtensions.EndsWith(query, "WHERE ")) query.Remove(query.Length - 6, 6);
+            return query.ToString();
+        }
+
+        private string BuildInsertQuery()
+        {
+            var query = new StringBuilder();
+            query.AppendFormat("INSERT INTO [{0}](", _mapper.TableName);
+            var values = new StringBuilder(" VALUES(");
+            _mapper.TraversalFields(f =>
+            {
+                if (f.AutoIncrement == false)
+                {
+                    query.Append("[" + f.Name + "],");
+                    values.Append("@" + f.Name + ",");
+                }
+            });
+            query.Remove(query.Length - 1, 1);
+            query.Append(")");
+            query.AppendFormat(" OUTPUT INSERTED.{0} ", _mapper.IdentityName);
+            values.Remove(values.Length - 1, 1);
+            values.Append(")");
+            query.Append(values);
+            return query.ToString();
+        }
+
+        private string BuildUpdateQuery()
+        {
+            var query = new StringBuilder();
+            query.AppendFormat("UPDATE[{0}] SET ", _mapper.TableName);
+            _mapper.TraversalFields(f =>
+            {
+                if (f.IsIdentity == false && f.AutoIncrement == false)
+                    query.Append("[" + f.Name + "] = @" + f.Name + ",");
+            });
+            query.Remove(query.Length - 1, 1);
+            query.AppendFormat(" OUTPUT INSERTED.{0} WHERE [{1}] = @{2}", _mapper.IdentityName, _mapper.IdentityName, _mapper.IdentityName);
+            return query.ToString();
+        }
+        #endregion
+
+        #region IDisposable
+        public void Dispose()
+        {
+        }
+        #endregion
+
+        public void Execute(string query)
+        {
+            _dbProvider.ExecuteNonResult(query);
+        }
+    }
+}

ZeroLevel.SqlServer/SqlServerEntities/ColumnInfo.cs

@@ -0,0 +1,62 @@
+using System;
+
+namespace ZeroLevel.SqlServer
+{
+    public class ColumnInfo: IEquatable<ColumnInfo>
+    {
+        /// <summary>
+        /// Наименование поля
+        /// </summary>
+        public string Name { get; set; }
+        /// <summary>
+        /// Тип поля в рамках базы данных
+        /// </summary>
+        public string DbType;
+        /// <summary>
+        /// Тип поля в рамках .NET
+        /// </summary>
+        public Type DotNetType;
+        /// <summary>
+        /// Указывает что поле является ключом таблицы
+        /// </summary>
+        public bool IsPrimaryKey;
+        /// <summary>
+        /// Указывает, разрешены ли значения NULL в поле
+        /// </summary>
+        public bool AllowNull;
+        /// <summary>
+        /// Размер в байтах (если применимо)
+        /// </summary>
+        public long Size;
+        /// <summary>
+        /// Указывает что поле является автоинкрементируемым
+        /// </summary>
+        public bool AutoInc;
+
+        public ColumnInfo() { }
+
+        public ColumnInfo(ColumnInfo other)
+        {
+            Name = other.Name;
+            DbType = other.DbType;
+            DotNetType = other.DotNetType;
+            IsPrimaryKey = other.IsPrimaryKey;
+            AllowNull = other.AllowNull;
+            Size = other.Size;
+            AutoInc = other.AutoInc;
+        }
+
+        public bool Equals(ColumnInfo other)
+        {
+            bool eq = true;
+            eq &= AutoInc == other.AutoInc;
+            eq &= Size == other.Size;
+            eq &= AllowNull == other.AllowNull;
+            eq &= IsPrimaryKey == other.IsPrimaryKey;
+            eq &= String.Compare(DbType, other.DbType, StringComparison.OrdinalIgnoreCase) == 0;
+            eq &= String.Compare(Name, other.Name, StringComparison.OrdinalIgnoreCase) == 0;
+            eq &= DotNetType.Equals(other.DotNetType);
+            return eq;
+        }
+    }
+}

ZeroLevel.SqlServer/SqlServerEntities/IndexInfo.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using ZeroLevel.Services.Collections;
+
+namespace ZeroLevel.SqlServer
+{
+    public class IndexInfo : IEquatable<IndexInfo>
+    {
+        public string Name;
+        public List<string> Columns = new List<string>();
+        public bool IsUnique;
+        public bool IsPrimaryKey;
+
+        public bool Equals(IndexInfo other)
+        {
+            bool eq = true;
+            eq &= String.Compare(Name, other.Name, StringComparison.Ordinal) == 0;
+            eq &= Columns.NoOrderingEquals(other.Columns);
+            eq &= IsUnique == other.IsUnique;
+            eq &= IsPrimaryKey == other.IsPrimaryKey;
+            return eq;
+        }
+
+        public override int GetHashCode()
+        {
+            return Name.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/SqlServerEntities/SqlDbForeignKeyInfo.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace ZeroLevel.SqlServer
+{
+    public sealed class SqlDbForeignKeyInfo : IEquatable<SqlDbForeignKeyInfo>
+    {
+        public const string ForeignKeySelectQuery = "SELECT K_Table = FK.TABLE_NAME, FK_Column = CU.COLUMN_NAME, PK_Table = PK.TABLE_NAME, PK_Column = PT.COLUMN_NAME, Constraint_Name = C.CONSTRAINT_NAME FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS C INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS FK ON C.CONSTRAINT_NAME = FK.CONSTRAINT_NAME INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS PK ON C.UNIQUE_CONSTRAINT_NAME = PK.CONSTRAINT_NAME INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE CU ON C.CONSTRAINT_NAME = CU.CONSTRAINT_NAME INNER JOIN ( SELECT i1.TABLE_NAME, i2.COLUMN_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS i1 INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE i2 ON i1.CONSTRAINT_NAME = i2.CONSTRAINT_NAME WHERE i1.CONSTRAINT_TYPE = 'PRIMARY KEY' ) PT ON PT.TABLE_NAME = PK.TABLE_NAME";
+
+        public string ForeignKeyName;
+        public string ForeignKeyTable;
+        public string PrimaryKeyTable;
+        public string ForeignKeyColumn;
+        public string PrimaryKeyColumn;
+
+        public bool Equals(SqlDbForeignKeyInfo other)
+        {
+            return String.Compare(ForeignKeyName, other.ForeignKeyName, StringComparison.OrdinalIgnoreCase) == 0 &&
+                String.Compare(ForeignKeyTable, other.ForeignKeyTable, StringComparison.OrdinalIgnoreCase) == 0 &&
+                String.Compare(PrimaryKeyTable, other.PrimaryKeyTable, StringComparison.OrdinalIgnoreCase) == 0 &&
+                String.Compare(ForeignKeyColumn, other.ForeignKeyColumn, StringComparison.OrdinalIgnoreCase) == 0 &&
+                String.Compare(PrimaryKeyColumn, other.PrimaryKeyColumn, StringComparison.OrdinalIgnoreCase) == 0;
+        }
+
+        public override int GetHashCode()
+        {
+            return ForeignKeyName.GetHashCode() ^
+                ForeignKeyTable.GetHashCode() ^
+                PrimaryKeyTable.GetHashCode() ^
+                ForeignKeyColumn.GetHashCode() ^
+                PrimaryKeyColumn.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/SqlServerEntities/SqlDbObjectInfo.cs

@@ -0,0 +1,38 @@
+namespace ZeroLevel.SqlServer
+{
+    public struct SqlDbObjectInfo
+    {
+        public string Name;
+        public string Header;
+        public string Text;
+
+        public static bool operator ==(SqlDbObjectInfo first, SqlDbObjectInfo second)
+        {
+            return first.Equals(second);
+        }
+
+        public static bool operator !=(SqlDbObjectInfo first, SqlDbObjectInfo second)
+        {
+            return !first.Equals(second);
+        }
+
+        public bool Equals(SqlDbObjectInfo other)
+        {
+            bool eq = true;
+            eq &= string.Compare(Name, other.Name, System.StringComparison.Ordinal) == 0;
+            eq &= string.Compare(Header, other.Header, System.StringComparison.Ordinal) == 0;
+            eq &= string.Compare(Text, other.Text, System.StringComparison.Ordinal) == 0;
+            return eq;
+        }
+
+        public override bool Equals(object obj)
+        {
+            return Equals((SqlDbObjectInfo)obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return Name.GetHashCode() ^ Header.GetHashCode() ^ Text.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/SqlServerEntities/SqlDbPrimaryKeyInfo.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace ZeroLevel.SqlServer
+{
+    public sealed class SqlDbPrimaryKeyInfo : IEquatable<SqlDbPrimaryKeyInfo>
+    {
+        public string PrimaryKeyTable;
+        public string PrimaryKeyColumn;
+
+        public bool Equals(SqlDbPrimaryKeyInfo other)
+        {
+            return String.Compare(PrimaryKeyTable, other.PrimaryKeyTable, StringComparison.OrdinalIgnoreCase) == 0 &&
+                String.Compare(PrimaryKeyColumn, other.PrimaryKeyColumn, StringComparison.OrdinalIgnoreCase) == 0;
+        }
+
+        public override int GetHashCode()
+        {
+            return PrimaryKeyTable.GetHashCode() ^ PrimaryKeyColumn.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/SqlServerEntities/SqlDbTableInfo.cs

@@ -0,0 +1,124 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+
+namespace ZeroLevel.SqlServer
+{
+    /// <summary>
+    /// Описание таблицы в БД
+    /// </summary>
+    public sealed class SqlDbTableInfo : TableInfo, IEquatable<SqlDbTableInfo>
+    {
+        #region Ctor
+        /// <summary>
+        /// Конструктор по-умолчанию
+        /// </summary>
+        /// <param name="name"></param>
+        public SqlDbTableInfo(string name) : base(name)
+        {
+        }
+        /// <summary>
+        /// Конструктор по-умолчанию
+        /// </summary>
+        /// <param name="name"></param>
+        public SqlDbTableInfo(SqlDbTableInfo other) : base(other)
+        {
+        }
+        #endregion
+
+        #region IEquatable
+        /// <summary>
+        /// Сравнение с другой таблицей
+        /// </summary>
+        public bool Equals(SqlDbTableInfo other)
+        {
+            return base.Equals(other);
+        }
+        #endregion
+
+        #region Fill table info
+        protected override IEnumerable<IndexInfo> GetIndexes(IDbProvider db)
+        {
+            var indexes = new List<IndexInfo>();
+            string select = "exec sp_indexes_rowset [{0}]";
+            using (var ds = db.ExecuteQuerySqlDataSet(string.Format(select, _name)))
+            {
+                using (var indexInfo = ds.Tables[0])
+                {
+                    foreach (DataRow row in indexInfo.Rows)
+                    {
+                        var i = new IndexInfo
+                        {
+                            Name = (string)row["INDEX_NAME"],                            
+                            IsPrimaryKey = (bool)row["PRIMARY_KEY"],
+                            IsUnique = (bool)row["UNIQUE"]
+                        };
+                        i.Columns.Add((string)row["COLUMN_NAME"]);
+                        indexes.Add(i);
+                    }
+                }
+            }
+            return indexes;
+        }
+
+        protected override IEnumerable<ColumnInfo> GetColumns(IDbProvider db)
+        {
+            // Для уменьшения количества обращения к базе все данные по таблице в одном запросе
+            var columns = new List<ColumnInfo>();
+            string select = @"exec sp_columns [{0}]
+SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH 
+FROM INFORMATION_SCHEMA.COLUMNS
+WHERE TABLE_NAME='{0}'
+exec sp_pkeys @table_name = [{0}]";
+            using (var ds = db.ExecuteQuerySqlDataSet(string.Format(select, _name)))
+            {
+                if (ds.Tables.Count != 3)
+                {
+                    throw new InvalidOperationException("Не удалось получить данные по таблице " + _name);
+                }
+                var columnTypes = new Dictionary<string, string>();
+                var columnSize = new Dictionary<string, long>();
+                using (var dataTypeInfo = ds.Tables[1])
+                {
+                    foreach (DataRow row in dataTypeInfo.Rows)
+                    {
+                        columnTypes.Add((string)row["COLUMN_NAME"], (string)row["DATA_TYPE"]);
+                        var maximum = row["CHARACTER_MAXIMUM_LENGTH"];
+                        columnSize.Add((string)row["COLUMN_NAME"], (maximum != DBNull.Value) ? Convert.ToInt64(row["CHARACTER_MAXIMUM_LENGTH"]) : 0);
+                    }
+                }
+                using (var tableInfo = ds.Tables[0])
+                {
+                    foreach (DataRow row in tableInfo.Rows)
+                    {
+                        var column = new ColumnInfo();
+                        column.Name = (string)row["COLUMN_NAME"];
+                        column.Size = columnSize[column.Name];
+                        column.DbType = columnTypes[column.Name];
+                        column.AllowNull = (short)row["NULLABLE"] == 1;
+                        column.DotNetType = DbTypeMapper.ToClrType(columnTypes[column.Name]);
+                        column.AutoInc = ((string)row["TYPE_NAME"]).Contains("identity");
+                        columns.Add(column);
+                    }
+                }
+                using (var pkInfo = ds.Tables[2])
+                {
+                    if (pkInfo.Rows.Count > 0 && pkInfo.Rows[0].ItemArray.Length > 3)
+                    {
+                        var primaryKeyName = pkInfo.Rows[0][3].ToString();
+                        var pc = columns.First(c => c.Name.Equals(primaryKeyName, StringComparison.OrdinalIgnoreCase));
+                        pc.IsPrimaryKey = true;
+                    }
+                }
+            }
+            return columns;
+        }
+        #endregion
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/SqlServerEntities/TableInfo.cs

@@ -0,0 +1,175 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace ZeroLevel.SqlServer
+{
+    public abstract class TableInfo : IEquatable<TableInfo>
+    {
+        #region Private fields
+        /// <summary>
+        /// Имя таблицы
+        /// </summary>
+        protected readonly string _name;
+        /// <summary>
+        /// Поле-идентификатор
+        /// </summary>
+        private ColumnInfo _primaryKey;
+        /// <summary>
+        /// Все поля таблицы
+        /// </summary>
+        private readonly Dictionary<string, ColumnInfo> _columns = new Dictionary<string, ColumnInfo>();
+        /// <summary>
+        /// Индексы
+        /// </summary>
+        private readonly List<IndexInfo> _indexes = new List<IndexInfo>();
+        #endregion
+
+        #region Properties
+        public ColumnInfo this[string columnName]
+        {
+            get
+            {
+                if (_columns.ContainsKey(columnName))
+                {
+                    return _columns[columnName];
+                }
+                return null;
+            }
+        }
+        /// <summary>
+        /// Первичный ключ
+        /// </summary>
+        public ColumnInfo PrimaryKey
+        {
+            get { return _primaryKey; }
+        }
+        /// <summary>
+        /// Имя таблицы
+        /// </summary>
+        public string Name
+        {
+            get
+            {
+                return _name;
+            }
+        }
+        /// <summary>
+        /// Индексы
+        /// </summary>
+        public List<IndexInfo> Indexes
+        {
+            get
+            {
+                return _indexes;
+            }
+        }
+        /// <summary>
+        /// Поля таблицы
+        /// </summary>
+        public IEnumerable<ColumnInfo> Columns
+        {
+            get
+            {
+                return _columns.Values;
+            }
+        }
+        #endregion
+
+        #region Ctor
+        /// <summary>
+        /// Конструктор по-умолчанию
+        /// </summary>
+        /// <param name="name"></param>
+        public TableInfo(string name)
+        {
+            _name = name;
+        }
+
+        /// <summary>
+        /// Конструктор по-умолчанию
+        /// </summary>
+        /// <param name="name"></param>
+        public TableInfo(TableInfo other)
+        {
+            _name = other._name;
+            _columns = new Dictionary<string, ColumnInfo>(other._columns);
+            _indexes = new List<IndexInfo>(other._indexes);
+            _primaryKey = other._primaryKey;
+        }
+        #endregion
+
+        #region IEquatable
+        public override bool Equals(object obj)
+        {
+            return this.Equals(obj as TableInfo);
+        }
+        /// <summary>
+        /// Сравнение с другой таблицей
+        /// </summary>
+        public bool Equals(TableInfo other)
+        {
+            if (other == null || _name.Equals(other._name, StringComparison.OrdinalIgnoreCase) == false)
+                return false;
+            if (false == Columns.NoOrderingEquals(other.Columns))
+            {
+                return false;
+            }
+            return true;
+        }
+        #endregion
+
+        #region Abstract
+        protected abstract IEnumerable<IndexInfo> GetIndexes(IDbProvider db);
+        protected abstract IEnumerable<ColumnInfo> GetColumns(IDbProvider db);
+        #endregion
+
+        #region Fill table info
+        public void AppendNewColumn(ColumnInfo column)
+        {
+            _columns.Add(column.Name, column);
+            if (column.IsPrimaryKey)
+                _primaryKey = column;
+        }
+        /// <summary>
+        /// Заполнение данных о таблице
+        /// </summary>
+        /// <param name="db">Подключение к базе данных</param>
+        public void FillTableInfo(IDbProvider db)
+        {
+            foreach (var column in GetColumns(db))
+            {
+                _columns.Add(column.Name, column);
+                if (column.IsPrimaryKey)
+                {
+                    _primaryKey = column;
+                }
+            }
+            foreach (var index in GetIndexes(db))
+            {
+                _indexes.Add(index);
+            }
+        }
+        #endregion
+
+        /// <summary>
+        /// Проверка наличия поля
+        /// </summary>
+        public bool ContainsColumns(ColumnInfo column)
+        {
+            return Columns.Any(r => r.Equals(column));
+        }
+        /// <summary>
+        /// Проверка наличия поля
+        /// </summary>
+        public bool ContainsColumns(string columnName)
+        {
+            return Columns.Any(r => r.Name.Equals(columnName, StringComparison.OrdinalIgnoreCase));
+        }
+
+        public override int GetHashCode()
+        {
+            return _name.GetHashCode();
+        }
+    }
+}

ZeroLevel.SqlServer/ZeroLevel.SqlServer.csproj

@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{A8AD956F-1559-45EC-A7DB-42290494E2C5}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>ZeroLevel.SqlServer</RootNamespace>
+    <AssemblyName>ZeroLevel.SqlServer</AssemblyName>
+    <TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <TargetFrameworkProfile />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x64\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x64</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
+    <OutputPath>bin\x64\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x64</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\x86\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DebugType>full</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x86'">
+    <OutputPath>bin\x86\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <Optimize>true</Optimize>
+    <DebugType>pdbonly</DebugType>
+    <PlatformTarget>x86</PlatformTarget>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Runtime.Serialization" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+    <Reference Include="ZeroLevel, Version=2.0.8.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\ZeroLevel.2.0.8\lib\netstandard2.0\ZeroLevel.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Contracts\BaseEntity.cs" />
+    <Compile Include="Contracts\BaseVersionedEntity.cs" />
+    <Compile Include="Contracts\DbIndexAttribute.cs" />
+    <Compile Include="Contracts\DbMemberAttribute.cs" />
+    <Compile Include="Contracts\IDbField.cs" />
+    <Compile Include="Contracts\IDbMapper.cs" />
+    <Compile Include="Contracts\IDbProvider.cs" />
+    <Compile Include="Contracts\IEntity.cs" />
+    <Compile Include="Contracts\IVersionedEntity.cs" />
+    <Compile Include="Contracts\ZSqlCommand.cs" />
+    <Compile Include="DbField.cs" />
+    <Compile Include="DbMapper.cs" />
+    <Compile Include="DbMapperFactory.cs" />
+    <Compile Include="DbTypeMapper.cs" />
+    <Compile Include="DDD\IdentitySpecification.cs" />
+    <Compile Include="GenericDbMapper.cs" />
+    <Compile Include="ISqlServerSpecification.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="BaseSqlDbMapper.cs" />
+    <Compile Include="GenericSqlDbMapper.cs" />
+    <Compile Include="SqlDbConnectionFactory.cs" />
+    <Compile Include="SqlDbInfo.cs" />
+    <Compile Include="SqlDbMapper.cs" />
+    <Compile Include="SqlDbProvider.cs" />
+    <Compile Include="SqlDbRepository.cs" />
+    <Compile Include="DDD\SqlIdentitySpecification.cs" />
+    <Compile Include="SqlServerEntities\ColumnInfo.cs" />
+    <Compile Include="SqlServerEntities\IndexInfo.cs" />
+    <Compile Include="SqlServerEntities\SqlDbForeignKeyInfo.cs" />
+    <Compile Include="SqlServerEntities\SqlDbObjectInfo.cs" />
+    <Compile Include="SqlServerEntities\SqlDbPrimaryKeyInfo.cs" />
+    <Compile Include="SqlServerEntities\SqlDbTableInfo.cs" />
+    <Compile Include="SqlServerEntities\TableInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

ZeroLevel.SqlServer/packages.config

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="ZeroLevel" version="2.0.8" targetFramework="net47" />
+</packages>

ZeroLevel.sln

@@ -17,36 +17,102 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileTransferClient", "FileT
 EndProject
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 EndProject
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