Call Windows open popup/alert/dialog platform specific code

Question

Hi,
I would like to open from platform specific code an alert in Windows.
I know I can do it from await Application.Current.MainPage.DisplayAlert("dad", "dsadas", "cancel"); but I want it from platform specific.
So I have implemented a service in Windows and I have tryied this:

MessageDialog msg = new MessageDialog("No Internet");
await msg.ShowAsync();

and this, but always it shows me an internal error. How can I open a popup in Windows from platform specific code ?

  var alertDialog = new AlertDialog
                    {
                        Content = "asda",
                        Title = "title",
                        VerticalScrollBarVisibility = Microsoft.UI.Xaml.Controls.ScrollBarVisibility.Auto,
                        FlowDirection = Microsoft.UI.Xaml.FlowDirection.LeftToRight,
                        PrimaryButtonText = "dasd",
                        SecondaryButtonText = "adsad"
                    };
                    await alertDialog.ShowAsync();

Answer 1

Hello,

I noticed that you're using the WinUI2 API calling method, while MAUI programs are based on WinUI3 on Windows, and the way MessageDialog is called is slightly different between them.

Please refer to User interface migration (including WinUI 3) - MessageDialog, and Pickers to get more details.

The following is a code examples:

using var process = Process.GetCurrentProcess();
var hwnd = process.MainWindowHandle;
var showDialog = new MessageDialog("Message here");
WinRT.Interop.InitializeWithWindow.Initialize(showDialog, hwnd);
await showDialog.ShowAsync();

Best Regards,

Alec Liu.

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.