Question

我有两个用于两个SqlCommand对象的更新sql语句，用DataSet对象将一个DataTable更新为一个源表。当我点击更新按钮时，只更新第一个，第二个SqlCommand对象不起作用。那是什么？ DataTable一次不支持两个Command对象？我写如下：

Dim conxMain As New SqlConnection("Data Source=SERVER;Initial Catalog=DBTest;Persist Security Info=True;User ID=usr;Password=pwd")

    Dim dadStockInfo As New SqlDataAdapter
    Dim dsStockInfo As New DataSet
    Dim transStockInfo As SqlTransaction = Nothing
    Try
        conxMain.Open()

        transStockInfo = conxMain.BeginTransaction()
        dadStockInfo.SelectCommand = New SqlCommand("SELECT * FROM Stock", conxMain, transStockInfo)
        Dim builder As SqlCommandBuilder = New SqlCommandBuilder(dadStockInfo)

        dadStockInfo.FillSchema(dsStockInfo, SchemaType.Source, "Stock")

        dadPurchaseInfo.Fill(dsPurchaseInfo, "Stock")

        Dim cmdStockUpdateCmd As SqlCommand = Nothing

        cmdStockUpdateCmd = New SqlCommand("UPDATE Stock SET StockCode= 'TestCode' WHERE StockID = 4", conxMain, transStockInfo)
        dsStockInfo.Tables("Stock").Columns("StockID").ReadOnly = False
        dadStockInfo.UpdateCommand = cmdStockUpdateCmd

        //dadStockInfo.Update(dsStockInfo, "Stock") [I have already tried this but did not work]

        Dim cmdStockUpdateCmd1 As SqlCommand = Nothing

        cmdStockUpdateCmd1 = New SqlCommand("UPDATE Stock SET StockCode= 'Test-Code2' WHERE StockID = 1", conxMain, transPurchaseInfo)

       dadStockInfo.UpdateCommand = cmdStockUpdateCmd1

       dadStockInfo.Update(dsStockInfo, "Stock")

       transStockInfo.Commit()

我不能像上面一样使用吗？请指出我！

你好！帮我！ F1：）

Answer 1

您使用它的方式不需要数据适配器和数据集...
您只需执行2个更新语句。

你可以做到

cmdStockUpdateCmd1 = New SqlCommand("UPDATE Stock SET StockCode= 'Test-Code2' WHERE StockID = 1", conxMain, transPurchaseInfo)
cmdStockUpdateCmd1.ExecuteNonQuery();

数据集和数据适配器用于将数据传输到客户端在客户端更改数据，然后将修改发送到服务器您正在使用SQL直接在服务器上进行更改。

两个SqlCommand对象和更新一个源表

1 个答案: