Maui - close up with confirmations

Question

Hi, I'm using .Net 8. I want when user will close the app he will get promp for Windows platform: If confirm it willl do this code otherwise close operation will be cancell ? How is can be done ?

My current code:

            builder
                .UseTelerik()
                .UseMauiApp<App>()
                .ConfigureLifecycleEvents(events =>
                {
#if WINDOWS
events.AddWindows(windowsLifecycleBuilder =>
{
    windowsLifecycleBuilder.OnWindowCreated(window =>
   {        
        var handle = WinRT.Interop.WindowNative.GetWindowHandle(window);
        var id = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(handle);
       var appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(id);      
        appWindow.Closing += async (s, e) =>
        {
            e.Cancel = true;
           
            try
            {
                if (!string.IsNullOrEmpty(LoginConfigurations.GetInstance().SessionToken) )
                {
                    var container = new Bootstrapper().Bootstrap();
                    IAutomationApiClient automationApiClient = container.Resolve<IAutomationApiClient>();
                   var res = await automationApiClient.PostLogOut($"{LoginConfigurations.GetInstance().Portal}/api/GSPortal/PostLogOut/false", LoginConfigurations.GetInstance().SessionToken);
                }
            }
            catch (Exception)
            {
            }
           App.Current.Quit();
           
                    `
           
        };
    });
});
#endif
                })

Then I use bool answer = await DisplayAlert("Question?", "Would you like to play a game", "Yes", "No"); to popup a window, but DisplayAlert can be not complied in mauiprogram.cs

Answer 1

Hello,

=================Update=================

Please do not remove   e.Cancel = true; in the Closing event like following code.

appWindow.Closing += async (s, e) =>  
{  
     e.Cancel = true;
      bool answer = await Application.Current.MainPage.DisplayAlert("Question?", "Would you like to play a game", "Yes", "No");
      if (answer)
      {


      }
      else{
            App.Current.Quit();
      }
}

bool answer = await DisplayAlert("Question?", "Would you like to play a game", "Yes", "No"); not complied in maui program/create maui app

You can use Application.Current.MainPage.DisplayAlert to invoke the DisplayAlert in maui program/create maui app like following code.

bool answer = await Application.Current.MainPage.DisplayAlert("Question?", "Would you like to play a game", "Yes", "No");
if (answer)
   {


}
else{
     App.Current.Quit();
}
                                

Best Regards, Leon Lu

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