## v0.3.16

- 修复 IInsert/IUpdate.NoneParameter() 设成了反作用的 bug；
- 修复 IDbFirst.GetTablesByDatabase() 默认数据库 bool 判断 bug；
- 增加 FreeSql.Repository 之 IUnitOfWork 实现，[查看参数资料](https://github.com/2881099/FreeSql/wiki/%e5%b7%a5%e4%bd%9c%e5%8d%95%e5%85%83)；
- 增加 FreeSql.Repository 继承实现的仓储注入；
```csharp
builder.RegisterFreeRepository(
    filter => filter.Apply<Song>("test", a => a.Title == DateTime.Now.ToString() +
        Thread.CurrentThread.ManagedThreadId),
    this.GetType().Assembly
);
```

FreeSql.Repository/UnitOfWork/IUnitOfWork.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace FreeSql {
+	public interface IUnitOfWork : IDisposable {
+
+		/// <summary>
+		/// 在工作单元内创建默认仓库类，工作单元下的仓储操作具有事务特点
+		/// </summary>
+		/// <typeparam name="TEntity"></typeparam>
+		/// <typeparam name="TKey"></typeparam>
+		/// <param name="filter">数据过滤 + 验证</param>
+		/// <returns></returns>
+		DefaultRepository<TEntity, TKey> GetRepository<TEntity, TKey>(Expression<Func<TEntity, bool>> filter = null) where TEntity : class;
+
+		/// <summary>
+		/// 在工作单元内创建仓库类，适用 Insert 方法无须返回插入的数据，工作单元下的仓储操作具有事务特点
+		/// </summary>
+		/// <typeparam name="TEntity"></typeparam>
+		/// <param name="filter">数据过滤 + 验证</param>
+		/// <param name="asTable">分表规则，参数：旧表名；返回：新表名 https://github.com/2881099/FreeSql/wiki/Repository</param>
+		/// <returns></returns>
+		GuidRepository<TEntity> GetGuidRepository<TEntity>(Expression<Func<TEntity, bool>> filter = null, Func<string, string> asTable = null) where TEntity : class;
+
+		void Commit();
+
+		void Rollback();
+	}
+}

FreeSql.Repository/UnitOfWork/UnitOfWork.cs

@@ -0,0 +1,70 @@
+using SafeObjectPool;
+using System;
+using System.Collections.Generic;
+using System.Data.Common;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace FreeSql {
+	class UnitOfWork : IUnitOfWork {
+
+		IFreeSql _fsql;
+		Object<DbConnection> _conn;
+		DbTransaction _tran;
+
+		bool _isCommitOrRoolback = false;
+
+		public UnitOfWork(IFreeSql fsql) {
+			_fsql = fsql;
+		}
+
+		DbTransaction BeginTransaction() {
+			_conn = _fsql.Ado.MasterPool.Get();
+			try {
+				_tran = _conn.Value.BeginTransaction();
+			} catch {
+				_fsql.Ado.MasterPool.Return(_conn);
+				_conn = null;
+				throw;
+			}
+			return _tran;
+		}
+
+		public void Commit() {
+			_isCommitOrRoolback = true;
+			if (_conn != null) {
+				try {
+					_tran.Commit();
+				} finally {
+					_fsql.Ado.MasterPool.Return(_conn);
+				}
+			}
+		}
+		public void Rollback() {
+			_isCommitOrRoolback = true;
+			if (_conn != null) {
+				try {
+					_tran.Rollback();
+				} finally {
+					_fsql.Ado.MasterPool.Return(_conn);
+				}
+			}
+		}
+		public void Dispose() {
+			if (_isCommitOrRoolback == false) {
+				this.Commit();
+			}
+		}
+
+		public DefaultRepository<TEntity, TKey> GetRepository<TEntity, TKey>(Expression<Func<TEntity, bool>> filter = null) where TEntity : class {
+			var repos = new DefaultRepository<TEntity, TKey>(_fsql, filter);
+			repos._tran = BeginTransaction();
+			return repos;
+		}
+		public GuidRepository<TEntity> GetGuidRepository<TEntity>(Expression<Func<TEntity, bool>> filter = null, Func<string, string> asTable = null) where TEntity : class {
+			var repos = new GuidRepository<TEntity>(_fsql, filter, asTable);
+			repos._tran = BeginTransaction();
+			return repos;
+		}
+	}
+}