CODEWITHSUNDEEP
exceptionmauiwinui-3maui-windowsuncaughtexceptionhandler
Monal
Monal

Reputation: 11

How to Show User Dialog on UI Thread for Global Unhandled Exceptions in .NET MAUI with WinUI 3?

I'm migrating a Xamarin.Forms project with UWP to .NET MAUI with WinUI3 (multi project app).

I need to implement a similar global exception handling logic in my MAUI project with WinUI 3. Although I'm able to trigger the method when an unhandled exception occurs, showing a user dialog on top of the UI thread in the specific page where the issue occurred doesn't seem to work in WinUI 3.

In my Xamarin.Forms project, I handled global unhandled exceptions by logging them and displaying a dialog on the current page using the following code in App.xaml.cs:

Application.Current.UnhandledException += All_UnhandledException;

private async void All_UnhandledException(object sender, Windows.UI.Xaml.UnhandledExceptionEventArgs e) { try { var exception = e.Exception; var crashLog = "Unhandled Exception | Message: " + exception.Message + " | Target Method: " + exception.TargetSite.Name + " | Target Class: " + exception.TargetSite.DeclaringType.FullName;

    Log.Fatal(crashLog, exception);

    e.Handled = true;

    await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
      async () =>
      {
          var showDialog = new MessageDialog("Caught the unhandled exception");
          await showDialog.ShowAsync();
      });
}
catch (Exception ex)
{                
    Log.Fatal($"Error while handling Unhandled exception: {ex.Message}");                    
}

}

How can I achieve this in a .NET MAUI project with WinUI 3? Any guidance or sample code would be greatly appreciated.

Upvotes: 0

Views: 168

Answers (1)

SHILPA RAMESH
SHILPA RAMESH

Reputation: 1

Use ContentDialog control.

To know more, Refer this page on how to use ContentDialog

Also, you need to use Task.Async() and await for this.

Upvotes: 0

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