Question

After pressing button following function is called.

Task.Factory.StartNew(() => 
{ 
    Parallel.For(0, cyclesCount, i => DoWork(i));

    if (OnJobCompleted != null)
        OnJobCompleted(this, EventArgs.Empty);                
});

Further in code there is

void ladder_OnJobCompleted(object sender, EventArgs args)
{
    txbDebug.Text = "completed";
}

I know

txbDebug.Text = "completed";

has to be Invoked, beacause I’m raising event on different thread. But I can’t figure out, how to Invoke it. This event is situated in wpf form.

Answer 1

Use the Dispatcher

txbDebug.Dispatcher.Invoke(new Action(() =>
{
    txbDebug.Text = "completed";
}));