属性“CommandArgument”只写

发布于 2024-09-29 12:40:15 字数 483 浏览 2 评论 0原文

我的代码中有以下行，位于 ImageButton 的单击事件处理程序内：

Protected Sub FinaliseBtn_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles FinaliseBtn.Click, SubmitPaymentViaChequeBtn.Click
   Dim str as String = sender.commandargument.ToString.ToLower
End Sub

两个控件都是 ImageButton 的。但是，我收到以下错误：

Property 'CommandArgument' is WriteOnly.

任何人都可以看到为什么我收到此错误，因为通常我可以从事件处理程序内的 CommandArgument 读取。事实上，这肯定是它们的主要用途！

谢谢。

原文

I have the following line in my code, inside the click event handler of an ImageButton:

Protected Sub FinaliseBtn_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles FinaliseBtn.Click, SubmitPaymentViaChequeBtn.Click
   Dim str as String = sender.commandargument.ToString.ToLower
End Sub

Both Controls are ImageButton's. However, I'm getting the following error:

Property 'CommandArgument' is WriteOnly.

Can anyone see why I'm getting this error as usually I can read from a CommandArgument inside an event handler. In fact, surely thats their main use!

Thanks.

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似狗非友 2024-10-06 12:40:15

您已为 EventArgs 连接了一个事件，但正在尝试检索 CommandArgs。

这应该是你的方法：

Sub ImageButton_Command(sender As Object, e As CommandEventArgs) 
         If (e.CommandName = "Sort") And (e.CommandArgument = "Ascending") Then
            Label1.Text = "You clicked the Sort Ascending Button"
         Else
            Label1.Text = "You clicked the Sort Descending Button"
         End If
      End Sub

You've wired up an event for EventArgs, but trying to retrieve CommandArgs.

This should be your method:

Sub ImageButton_Command(sender As Object, e As CommandEventArgs) 
         If (e.CommandName = "Sort") And (e.CommandArgument = "Ascending") Then
            Label1.Text = "You clicked the Sort Ascending Button"
         Else
            Label1.Text = "You clicked the Sort Descending Button"
         End If
      End Sub

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