How do I "Hide()" a Modal WPF Window without it closing?

Question

I have a WPF window that is run on a background thread as a sort of "notifier window"... when an event is raised, it displays a message... a user clicks the "Snooze" button and I call this.Visibility = Visibility.Collapsed

The very moment that I hide the window (either by calling this.Hide() or setting the Visibility as mentioned above)... the "ShowDialog()" code releases the window and closes it.

This is absolutely a bug in the WPF code (which I've identified via reflector)... but my question remains. Has anyone been able to come up with a work-around for this issue?

I've tried many things and am now reaching out to ya'll smart people :)

Answer 1

You can't hide a modal dialog. That's like asking, "How do I get to 100mph in reverse?" You don't, you drive the car forwards.

Use Show, not ShowDialog. Alternately you can simply re-ShowDialog when it needs to become visible again.

Answer 2

Timothy's Answer is good. I just needed for my scenerio to add the following

window.Closed += new EventHandler(window_Closed);
window.Show();
System.Windows.Threading.Dispatcher.Run(); 

and then in the event...

void window_Closed(object sender, EventArgs e)
{
    System.Windows.Threading.Dispatcher.ExitAllFrames();
}

I needed to do this because it was hanging on the Run after the form was really closed.