Cancelling BackgroundWorker While Running
- by Nevets
I have an application in which I launch a window that displays byte data coming in from a 3rd party tool. I have included .CancelAsync() and .CancellationPending into my code (see below) but I have another issue that I am running into.
private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
Thread popupwindow = new Thread(() => test());
popupwindow.Start(); // start test script
if(backgroundWorker.CancellationPending == true)
{
e.Cancel = true;
}
}
private voide window_FormClosing(object sender, FormClosingEventArgs e)
{
try
{
this.backgroundWorker.CancelAsync();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
Upon cancelling the test I get an `InvalidOperationException occurred" error from my rich text box in my pop-up window. It states that "Invoke or BeginInvoke" cannot be called on a control until the window handle has been created". I am not entirely sure what that means and would appreciate your help.
LogWindow code for Rich Text Box:
public void LogWindowText(LogMsgType msgtype, string msgIn)
{
rtbSerialNumberValue.Invoke(new EventHandler(delegate
{
rtbWindow.SelectedText = string.Empty;
rtbWindow.SelectionFont = new Font(rtbWindow.SelectionFont, FontStyle.Bold);
rtbWindow.SelectionColor = LogMsgTypeColor[(int)msgtype];
rtbWindow.AppendText(msgIn);
rtbWindow.ScrollToCaret();
}));
}
