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

You'd better to use the power of UriMapper

Here you can find a good article.

The core idea is:

You should define an empty page (EntryPage.xaml) and set it as a default page of your app. Then in your custom UriMapper you overload the MapUri method.

   public class YourUriMapper : UriMapperBase
   {
    public override Uri MapUri(Uri uri)
    {
        if (uri.OriginalString == "/EntryPage.xaml")
        {
            var settings = IsolatedStorageSettings.ApplicationSettings;

            if (!settings.Contains("WasLaunched"))
            {
                 uri = new Uri("/FirstRunInfoPage.xaml", UriKind.Relative);
            }
            else
            {
                 uri = new Uri("/MainPage.xaml", UriKind.Relative);
             }
         }
            return uri;
     } 
  }

Then on app initialization you should define which UriMapper to use:

private void Application_Launching(object sender, LaunchingEventArgs e)
{
    RootFrame.UriMapper = new YourUriMapper();
}

private void Application_Activated(object sender, ActivatedEventArgs e)
{
    if (e.IsApplicationInstancePreserved == false)
    {
      // tombstoned! Need to restore state
      RootFrame.UriMapper = new YourUriMapper();
    }
}