Remove a page from Navigation Stack

Question

I have this application schema :

[List Page] -> [Detail Page] -> [ShareOnFacebook Page]
                     ^__________________|

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Answer 1

Have a look at simple library i wrote for such purposes: http://navcoerce.codeplex.com/

var fluent = new FluentNavigation(RootFrame);                          

fluent.WhenNavigatedTo<MainPage>()                                     
      .ThenTo<LoginPage>()                                             
      .ThenToAnyPage()                                                 
      .RemoveEntriesFromBackStack(1);                                  

fluent.WhenNavigatedTo<MainPage>()                                     
      .ThenTo<LoginPage>()                                             
      .ThenTo<RegisterPage>()                                          
      .ThenTo<PaymentPage>()                                           
      .RemoveEntriesFromBackStackTill<MainPage>();                     

fluent.WhenNavigatedTo<MainPage>()                                     
      .ThenTo<SecondPage>()                                            
      .ThenTo<RegisterPage>()                                          
      .ThenOptionallyTo<ForgotPasswordPage>()                          
      .ThenToAnyPage()                                                 
      .RemoveEntriesFromBackStackTill<MainPage>();                     

fluent.WhenNavigatingTo<PaymentPage>()                                 
      .RedirectTo<LoginPage>();                                        

fluent.WhenNavigatingTo<PaymentPage>()                                 
      .If(() => false)                                                 
      .RedirectWithReturnUri<LoginPage>("ReturnUri");   

Answer 2

I have a similar situation in my app, i solve it with a very simple solution.

If you want to "skip" a page in your backstack, place some logic in the NavigatedTo() function of that page.

For example: you can have a bool that you set to true when you post to facebook, and then place the following code in the NavigatedTo() function of the ShareOnFacebook page.

Here is pseudo code:

if (alreadyPosted) Navigation.GoBack();

The GoBack() function will skip this page and return to the previous one, the user will never see the page.

Answer 3

I use the removeBackEntry method on the NavigationService Class. I also use this as a way to setup my own splash screens

        private void BWorkerRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        // switch screen 
        NavigationService.Navigated += new NavigatedEventHandler(NavigationServiceNavigated);
        NavigationService.Navigate(new Uri("/Pages/main.xaml", UriKind.Relative));

    }

    void NavigationServiceNavigated(object sender, NavigationEventArgs e)
    {
        NavigationService.RemoveBackEntry();
    }

Answer 4

Have a look at the new Nonlinear Navigation Service recipe

Download it from http://create.msdn.com/en-us/education/catalog/article/nln-serv-wp7

Answer 5

I posted an example for the same issue here.

The Nonlinear Navigation Service Matt linked to essentially does the same thing but would probably be better than my simple example.

Answer 6

Try this: Call NavigationService.RemoveBackEntry(); in the OnNavigatedTo method. This will remove the previous page from the stack. In my opinion the trick with Navigation.GoBack(); is not satisfying because it shows the page to remove for a short time.

Note: Works only with Windows Phone OS 7.1 (Mango) SDK