Update UI async?

Question

Consider this example:

Private Sub Button_Click(
    sender As Button, e As RoutedEventArgs) Handles btn.Click

  sender.IsEnabled = False

  Thread.Sleep(50         


        

Answer 1

Bind the button enabled property to a property in your VM (say ProcessComplete).

Use the button onclick event to trigger a method in your VM that starts up your long winded process. Keep the ProcessComplete False whilst the process is running and then set it True when it completes.