关于DataSet事务处理以及SqlDataAdapter四种用法

如果是直接执行SQL语句时，事务很好处理，对于大多数的Erp应用，不能能用SQL来处理数据，所以更新DataSet更为常用，更新单个的DataSet也非常简单，不需要事务的处理，给多个DataSet增加事务多数应用于分布式的程序代码中，下面为在Webservice中更新Winform传递过来的经过压缩的数据集的事务处理代码，多个DataSet 情况。/// <summary> /// 更新经过压缩的DataSet /// </summary> /// <param >环境变量</param> /// <param >二进制的DataSet</param> /// <returns>出现异常,返回一个错误信息</returns> public object UpdataSet(object[] env, byte[] byt) { object info = null; SqlConnection sqlconn = null; //定义事务 SqlTransaction transaction = null; DataSet ds = null; try { ds = md.BytesToDs(byt); string Url = "数据库连接语名"; sqlconn = new SqlConnection(Url); sqlconn.Open(); transaction = sqlconn.BeginTransaction(IsolationLevel.ReadCommitted, "transname");//实例化事务 SqlDataAdapter adapter; SqlCommandBuilder objCommandBuilder; for (int i = 0; i < ds.Tables.Count; i++) { adapter = new SqlDataAdapter("select * from " + ds.Tables[i].TableName + " where 2>3", sqlconn);//传统用法 objCommandBuilder = new SqlCommandBuilder(adapter); //开始挂起 //挂起操作 adapter.DeleteCommand = new SqlCommand("...删除语句..", sqlconn, transaction); //adapter的增删查改可以与事务一起用,注意这里没有实例SqlCommand对象所以new SqlCommand adapter.InsertCommand = new SqlCommand("............", sqlconn, transaction); adapter.UpdateCommand = new SqlCommand(".............", sqlconn, transaction); adapter.SelectCommand = new SqlCommand("select * from " + ds.Tables[i].TableName + " where 2>3", sqlconn, transaction); //以上是adapter的新用法,new SqlCommand后面写sql语句,SqlConnection,还可以写事务...就不用实例SqlCommand对象 //没有实例SqlCommand对象所以获取 adapter.DeleteCommand = objCommandBuilder.GetDeleteCommand(); adapter.InsertCommand = objCommandBuilder.GetInsertCommand(); adapter.UpdateCommand = objCommandBuilder.GetUpdateCommand(); objCommandBuilder.DataAdapter.Update(ds, ds.Tables[i].TableName.ToString());// } transaction.Commit();//无误后提交事务 sqlconn.Close(); } catch (Exception err) { Console.Out.WriteLine("存盘时发生错误:" + err.Message); info = "存盘时发生错误:" + err.Message; //事务回滚 transaction.Rollback(); } finally { if (sqlconn != null) { sqlconn.Close(); } } return info; }