Parameter count mismatch

[kalo93]

I get a parameter count mismatch when trying to invoke.

[Joacim Andersson]

The problem is that the UpdateDelegate takes a ParamArray of parameters and you can not pass a regular array to a ParamArray and a delegate doesn't allow ParamArrays so it's kind of a catch 22 moment. You can either change your UpdateForm to accept two parameters (a string and an object) or you can pass in a lambda into the UpdateDelegate constuctor and get rid of the delegate.

  Public Sub UpdateForm(parameters() As Object)
    If Me.InvokeRequired Then
      Me.Invoke(Sub()
                  Select Case CStr(parameters(0))
                    Case "Title"
                      Me.Text = CStr(parameters(1))
                    Case "ButtonText"
                      Button1.Text = CStr(parameters(1))
                    Case "Size"
                      Me.Size = DirectCast(parameters(1), Size)
                  End Select
                End Sub)
    End If
  End Sub

Edit: It should probably look this way just in case an invoke isn't reguired:

  Public Sub UpdateForm(parameters() As Object)
    Dim invokeSub = Sub()
                      Select Case CStr(parameters(0))
                        Case "Title"
                          Me.Text = CStr(parameters(1))
                        Case "ButtonText"
                          Button1.Text = CStr(parameters(1))
                        Case "Size"
                          Me.Size = DirectCast(parameters(1), Size)
                      End Select
                    End Sub
    If Me.InvokeRequired Then
      Me.Invoke(invokeSub)
    Else
      invokeSub()
    End If
  End Sub

[szlamany]

@kalo93 - sorry to jump in here - not really on topic - I'm just curious...

Why are you doing an update on a different thread?? What is the requirement that you are serving by doing that??

[kalo93]

@kalo93 - sorry to jump in here - not really on topic - I'm just curious...

Why are you doing an update on a different thread?? What is the requirement that you are serving by doing that??

I was writing a tutorial, I've fixed it now though.