Question

I have got this code. It works but it freezes the UI.
What I want to know is how to use WPF BeginInvok method corectly?

private void ValidateAuthURL_Click(object sender, RoutedEventArgs e)
{
    ((Button)sender).Dispatcher.BeginInvoke(DispatcherPriority.Input, 
        new ThreadStart(() =>
        {
            bool result = false;
            try
            { 

Answer 1

Your delegate is going to be executed in the UI thread. That’s what Dispatcher.BeginInvoke is there for. I assume you really want to execute that delegate in a background thread… then you should use Dispatcher.BeginInvoke to get back to the UI thread in order to update the UI later.

In terms of getting to a background thread, you could:

• Use the thread pool directly (ThreadPool.QueueUserWorkItem)
• Use BackgroundWorker
• Start a new thread
• Use Task.Factory.StartNew (if you’re using .NET 4)