Property 'CommandArgument' is WriteOnly
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27-09-2019 - |
Question
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.
Solution
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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