Is there a function that can restart a WinUI app?

Question

I'm developing a WinUI3 based app and I need to restart the app to apply some settings. But I can't find a function to do that. I noticed that there is a method--CoreApplication.RequestRestartAsync. However, it only shut the app down but didn't open the app. Is there an API can restart a WinUI app?

Are there any specifics in how your app is running? The reason I'm asking - the documentation mentions a couple of important things regarding this. For example, "The app must be visible and foreground when it calls this API." — FiddlingAway
– FiddlingAway, Commented Feb 15, 2024 at 4:37

Andrew KeepCoding · Accepted Answer · 2024-02-15 05:46:27Z

1

Try the Restart API:

// You can pass arguments to the restarted instance.
private void RestartApp(string arguments = "")
{
    // The restart will be executed immediately.
    Windows.ApplicationModel.Core.AppRestartFailureReason failureReason = 
        Microsoft.Windows.AppLifecycle.AppInstance.Restart(arguments);

    // If the restart fails, handle it here.
    switch (failureReason)
    {
        case AppRestartFailureReason.RestartPending:
            break;
        case AppRestartFailureReason.NotInForeground:
            break;
        case AppRestartFailureReason.InvalidUser:
            break;
        default: //AppRestartFailureReason.Other
            break;
    }
}

edited Feb 15, 2024 at 5:46

answered Feb 15, 2024 at 5:07

Andrew KeepCoding

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Comments

mm8 · Accepted Answer · 2024-02-19 15:18:19Z

0

The suggested Restart API is probably a good place to start.

You should also be able to start a new process like you would start any other .NET process:

string path = Process.GetCurrentProcess().MainModule.FileName;
Process process = Process.Start(new ProcessStartInfo(path));
IntPtr intPtr = IntPtr.Zero;
do
{
    intPtr = process.MainWindowHandle;
}
while (intPtr == IntPtr.Zero);

Environment.Exit(0);

answered Feb 19, 2024 at 15:18

mm8

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2 Comments

Sciencekill Over a year ago

This solution sometimes works, but sometimes it only close the app but don't run a new app

mm8 Over a year ago

The code starts the process before closing the current one.

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