Opening an app from other app using protocol

Question

Hello,

I am trying to open app from other app where the opened app has a protocol defined in its manifest.

I use such code:

        public async void OpenOrShowInStore(string customCampaignId)
        {
            //if not instaled go to
            LauncherOptions options = new LauncherOptions();

            if (customCampaignId == "")
            {
                options.FallbackUri = appWinStoreProtocolUri;
            }
            else
            {
                if (Uri.TryCreate(appWinStoreProtocolUri.OriginalString + "&cid=" + customCampaignId, UriKind.RelativeOrAbsolute, out Uri newUri))
                {
                    var a = newUri.OriginalString;

                    options.FallbackUri = newUri;

                }
                else
                    options.FallbackUri = appWinStoreProtocolUri;
            }

            var success = await Windows.System.Launcher.LaunchUriAsync(appUri, options);
        }

The protocol is defined in opened app manifest in declaration section.

Main app is instaled as flight package, opened app is instaled as flight package too.

OnActivated(IActivatedEventArgs args) event isnt implemented in opened app because I do nothing when I open the app, I want simplu opent it.

Result of my code is such that opened app opens, but is stuck on splash screen.

How to fix this problem?

Answer 1

Hi @BitSmithy ,

Welcome to Microsoft Q&A!

OnActivated(IActivatedEventArgs args) event isnt implemented in opened app because I do nothing when I open the app, I want simplu opent it.

I think this is the reason for the unexpected behavior, you did nothing in OnActivated.

Refer to the official sample Association launching sample and you should initialize the root Frame and activate the Window.

You can try adding this code in the opened app(App.xaml.cs). I tested it and it works

protected override void OnActivated(IActivatedEventArgs e)
{
    if (e.Kind == ActivationKind.Protocol)
    {
        Frame rootFrame = CreateRootFrame();
        if (rootFrame.Content == null)
        {
            if (!rootFrame.Navigate(typeof(MainPage)))
            {
                throw new Exception("Failed to create initial page");
            }
        }
        rootFrame.Navigate(typeof(MainPage), e);
        // Ensure the current window is active
        Window.Current.Activate();
    }
}
private Frame CreateRootFrame()
{
    Frame rootFrame = Window.Current.Content as Frame;
    // Do not repeat app initialization when the Window already has content,
    // just ensure that the window is active
    if (rootFrame == null)
    {
        // Create a Frame to act as the navigation context and navigate to the first page
        rootFrame = new Frame();
        // Set the default language
        rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];
        rootFrame.NavigationFailed += OnNavigationFailed;
        // Place the frame in the current Window
        Window.Current.Content = rootFrame;
    }
    return rootFrame;
}

Thank you.

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