/// <summary> /// 开启事务 /// </summary> /// <param name="connectionId">连接ID</param> /// <param name="isolation">事务级别</param> /// <returns>数据库事务</returns> public IDbTransaction BeginTransaction(string connectionId, IsolationLevel isolation = IsolationLevel.ReadCommitted) => DbConnectionManager.BeginTransaction(connectionId, this, isolation);
