CODEWITHSUNDEEP
c#wpfwindowhide
PaulG
PaulG

Reputation: 187

WPF hide a window in Closing event prevents from application terminating

A simple question again.

I am using a window in a WPF as a child window, where I would rather have the 'X' button hide the window instead of close. For that, I have:

private void Window_Closing(object sender, CancelEventArgs e) {
   this.Hide();
   e.Cancel = true;
}

The problem is that when the parent window is closed, this never closes and keeps the app alive.

Is there a clean way to deal with this? I thought of adding a Kill flag to all my user controls (windows):

public bool KillMe;

private void Window_Loaded(object sender, RoutedEventArgs e){
   KillMe = false;
}

private void Window_Closing(object sender, CancelEventArgs e) {
   this.Hide();
   if (!KillMe) e.Cancel = true;
}

Then in MainWindow_Closing() I would have to set all window KillMe flags to true.

Any better way than creating additional flags and forgetting to set them before closing?

Upvotes: 4

Views: 9582

Answers (4)

user23719438
user23719438

Reputation: 1

I had similar problem and setting ONLY (no extra C# code) ShutdownMode="OnMainWindowClose" (Application element) in App.xaml did the trick.

Upvotes: 0

MegaMilivoje
MegaMilivoje

Reputation: 1801

You should use

Application.Current.Shutdown();

inside your master window closing method.

This should override canceling of any subwindow!

Upvotes: 2

Sasha Reminnyi
Sasha Reminnyi

Reputation: 3512

I usualy have my own AppGeneral static class for such cases. When I'm realy exiting app I'm setting AppGeneral.IsClosing static bool to true. And then, when closing:

private void Window_Closing(object sender, CancelEventArgs e) {
if (!AppGeneral.IsClosing)   
   { 
     this.Hide();
     e.Cancel = true;
   }
}

Also, you can kill the your own process (that's ugly but working :) ) Process.GetCurrentProcess().Kill();

Upvotes: 2

Reed Copsey
Reed Copsey

Reputation: 564333

You could call Shutdown in the "parent's" closing handler... This will cause your Cancel to be ignored.

From Window.Closing:

If Shutdown is called, the Closing event for each window is raised. However, if Closing is canceled, cancellation is ignored.

Upvotes: 9

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