WINDOWS PHONE 8.1 UNIVERSAL APP TERMINATES ON NAVIGATING BACK FROM SECOND PAGE?

jacob rasel

Total Post:88

Points:616
Posted by  jacob rasel
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I have 2 pages in my Windows Phone 8.1 Universal App.

I navigate from Page1.xaml to Page2.xaml by using a button with the click event code:

this.Frame.Navigate(typeof(Page2));

When I am on Page2, and I use the hardware back button the app closes without an exception or anything. It just returns to the startscreen.

I already tried the following on Page 2:

public Page2()
    {
        this.InitializeComponent();
        Windows.Phone.UI.Input.HardwareButtons.BackPressed += HardwareButtons_BackPressed;
    }
    void HardwareButtons_BackPressed(object sender, Windows.Phone.UI.Input.BackPressedEventArgs e)
    {
        Frame.GoBack();
    }


As far as I know I do not clear the back stack.

What is going on, and how can I fix this?

  1. Mayank Tripathi

    Post:397

    Points:3117
    Re: Windows Phone 8.1 Universal App terminates on navigating back from second page?

    This is new to Windows Phone 8.1.

    If you create a new Hub Universal App using a VS2013 template, you'll notice a class in Common folder called a NavigationHelper.

    This NavigationHelper gives you a hint how to properly react to back button press. So, if you don't want to use the NavigationHelper, here's how to get the old behavior back:
    public BlankPage1()
    {
        this.InitializeComponent();
        HardwareButtons.BackPressed += HardwareButtons_BackPressed;
    }
    void HardwareButtons_BackPressed(object sender, BackPressedEventArgs e)
    {
        if (Frame.CanGoBack)
        {
            e.Handled = true;
            Frame.GoBack();
        }
    }

    You can also do it on app level, to avoid having to do it on every page:

    public App()
    {
        this.InitializeComponent();
        this.Suspending += this.OnSuspending;
        #if WINDOWS_PHONE_APP
        HardwareButtons.BackPressed += HardwareButtons_BackPressed;
        #endif
    }
    #if WINDOWS_PHONE_APP
    void HardwareButtons_BackPressed(object sender, BackPressedEventArgs e)
    {
        Frame rootFrame = Window.Current.Content as Frame;
        if (rootFrame != null && rootFrame.CanGoBack)
        {
            e.Handled = true;
            rootFrame.GoBack();
        }
    }
    #endif

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