Update UI form from worker thread

Question

I am new to multi-threading in VB.NET and have come across a problem whereby I am wanting to append text to a text box on a form from a service thread running in the backgro

Answer 1

The Delegate method is likely the way you want to go, but I don't see the declaration of the UpdateUIDelegate anywhere

I believe your code should look something like this (assuming you have a reference to the testdebug form local to your remotesupport class

Dim outMessage As String = (encoder.GetString(message, 0, bytesRead))
MsgBox(outMessage, MsgBoxStyle.Information, "MEssage Received")
If outMessage IsNot Nothing Then
    If testDebug.InvokeRequired Then
        ' have the UI thread call this method for us
        testDebug.Invoke(New MessageReceivedHandler(AddressOf Testdebug.Message_Received), New Object() {outMessage})   
    Else
        testDebug.txtOutput.AppendText(outMessage)
    End If
end if