事务

 //    using (SqlConnection conn = new SqlConnection(SqlHelper.DB_CONNECTION_STRING))         //    {         //        //定义命令         //        SqlCommand cmd = new SqlCommand();         //        //设置链接         //        cmd.Connection = conn;

        //        //打开链接         //        conn.Open();

        //        //产生事务         //        SqlTransaction tran = conn.BeginTransaction();

        //        //设置事务处理对象         //        cmd.Transaction = tran;

        //        try         //        {         //           处理业务 。。。 。。、

        //            //提交

        //            tran.Commit();         //        }         //        catch (Exception ex)         //        {         //            //回滚         //            tran.Rollback();         //            throw ex;         //        }         //    }

事务

原文：http://www.cnblogs.com/liuyudun/p/3526687.html