File Activation in Windows 8 RT

The code sample for file activation on MSDN is lacking some code so a simple way to pass the file clicked to your MainPage could be:

protected override void 
    OnFileActivated(FileActivatedEventArgs args)
{
    var page = new Frame();
    page.Navigate(typeof(MainPage));
    Window.Current.Content = page;
 

    var p = page.Content as MainPage;
    if (p != null) p.FileEvent = args;
    Window.Current.Activate();
}

And in MainPage:

public MainPage()
{
    InitializeComponent();
    Loaded += MainPageLoaded;
}
void MainPageLoaded(object sender, RoutedEventArgs e)
{
    if (FileEvent != null && FileEvent.Files.Count > 0)
    {
        //… do something with file
    }
}