Write query when closing the app

Question

Hi,

I'm in net 7, I want the close event of app button and write query of http to check something, how is can be done ?

Thanks,

Answer 1

Hello,

I need the close event of the application ?

Yes, if you want to detect the close button event in the title bar, you can get the appwindow for windows platform. And re-write the close event, after query operation finished, then close this application.

 public static MauiApp CreateMauiApp()
    {
        var builder = MauiApp.CreateBuilder();
        builder
            .UseMauiApp<App>()
            .ConfigureLifecycleEvents(events =>
            {
               //add here

#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;
            using HttpClient httpClient = new HttpClient();
           // Compose and send the HTTP request
            HttpResponseMessage responseCode = await httpClient.GetAsync("https://learn.microsoft.com/");
            // Check the response status
            if (responseCode.IsSuccessStatusCode)
            {
               // "query successful";
                App.Current.Quit();
            }
            else
            {
              // query failed"
                App.Current.Quit();
            }
                       
           
        };
    });
});
#endif

Best Regards,

Leon Lu

---

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Answer 2

I hope this sample code help you:

using System;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        // Simulate a button close event
        await HandleButtonCloseEvent();

        // Your application's cleanup code
    }

    static async Task HandleButtonCloseEvent()
    {
        using HttpClient httpClient = new HttpClient();

        // Compose and send the HTTP request
        HttpResponseMessage response = await httpClient.GetAsync("https://api.example.com/some_endpoint");

        // Check the response status
        if (response.IsSuccessStatusCode)
        {
            Console.WriteLine("HTTP query successful");
        }
        else
        {
            Console.WriteLine("HTTP query failed");
        }
    }
}