Method cannot contain both an 'On Error GoTo' statement and a lambda or query expression

Question

Hello

Once I open my vb .net 2010 project in VS 2022 I get this infamous error here:

On Error Resume Next
Dim MyValueString As String = String.Empty
If PBarX.InvokeRequired Then
    Invoke(Sub() PBarX.Text = MyValueString)
Else
    PBarX.Text = MyValueString
End If

Anyone can help me and advise how to make the code compile without raising this error?

For some reason I insist to keep the On Error Resume Next

I aknowledge the danger of On Error Resume Next :)

Answer 1

Hi @Peter Volz ,

Starting in VS2012, the compiler does not allow methods to contain both "GoTo on error" statements and lambda or query expressions.

If you don't consider replacing the exception-handling code that uses the "Goto statement on error" with Try... Capture the statement, then you can only compile this code in VS2010.

Best Regards.

Jiachen Li

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Answer 2

If you insist, then try this:

On Error Resume Next
Dim MyValueString As String = String.Empty
If PBarX.InvokeRequired Then
   PBarX.Invoke(New SetTextDelegate(AddressOf SetText), MyValueString)
Else
   SetText(MyValueString)
End If

. . .

Delegate Sub SetTextDelegate(s As String)

Sub SetText(s As String)
   PBarX.Text = s
End Sub

Also consider this:

Try
   Dim MyValueString As String = String.Empty
   If PBarX.InvokeRequired Then
      PBarX.Invoke(Sub() PBarX.Text = MyValueString)
   Else
      PBarX.Text = MyValueString
   End If
Catch
   ' issue hidden
End Try