How to Show a Page if Application is Launched for the First Time

Question

I am wondering how to signal whether an appication is launched for the very first time, or has already been launched before. The reason I want to do this is to show a very s

Answer 1

The best approach for the check is to write the status in the Isolated storage as you currently are. To redirect to the appropriate page, I would personally use a URI mapper. that way, your first intended entry page would be in the navigation first entry stack, preventing users from navigating back to the first page. A typical use case would be to redirect a user to a an authentication page when a user isn't authenticated and to a home page when the user is already authenticated, see This example

  public App()
    {
        SetUpLandingPageView();
    }


     void SetUpLandingPageView()
    {
        var isLaunched = IsolatedStorageSettings.ApplicationSettings.Contains("WasLaunched");

        // Get the UriMapper from the app.xaml resources, and assign it to the root frame
        var mapper = Resources["mapper"] as UriMapper;

        if (mapper == null) 
            throw new ArgumentNullException("Mapper must be configured");

        RootFrame.UriMapper = Resources["mapper"] as UriMapper;

        // Update the mapper as appropriate
        mapper.UriMappings[0].MappedUri = isLaunched ? new Uri("/Views/HomePage.xaml", UriKind.Relative) : new Uri("/Views/Introduction.xaml", UriKind.Relative);    
    }

In the app.xaml

Namespace:

xmlns:UriMapper="clr-namespace:System.Windows.Navigation;assembly=Microsoft.Phone"

Xaml