How to remove a page from the navigation history?

Question

I have 3 pages in my app. Page # 2 navigates back to page #1 and forward to Page # 3. How can I make it so navigating back from page #3 would skip page # 2 and go directly to #1?

Silverlight != WP7. It would get less views with proper tags. :) — Léon Pelletier, Jun 10 '14 at 22:39

Sergey Aldoukhov · Accepted Answer · 2011-07-13T17:45:33.197

6

What I ended up with, is combining pages #2 and #3 in one page. When I need page#2, I use navigation parameter to start the page with #2 content visible, when I'm done with #3, I simply hide #2 content.

EDIT: In Mango, there is a NavigationService.RemoveBackEntry() function that does exactly what is needed.

edited Jul 13 '11 at 17:45

answered Oct 22 '10 at 03:59

Sergey Aldoukhov

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this.NavigationService is always "null" for me, how did you get around that? – Jonny Aug 10 '11 at 04:59
@Jonny put it in the page loaded event – EaterOfCode Jun 09 '13 at 21:13

score 4 · Answer 2 · answered Sep 28 '10 at 08:58

There's no way to go directly from page#3 to page#1 without going through page#2.

You could however handle OnNavigatedTo in Page#2 and if coming from Page#3 then issue another call to NavigationService.GoBack().
Something like:

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
  if (comingFromPage3)
  {
    NavigationService.GoBack();
  }

  base.OnNavigatedTo(e);
}

There are various ways you could track if coming from page#3. I'd be tempted to go with a global variable to indicate this (set in page#3 and checked in page#2).
If you decide to use simple tracking of how many times the page has been navigated to (i.e. the second time the page is navigated to it must be in return from #3) be careful about what happens when tombstoned when either page#2 or page#3 is displayed.

This works, but Page #2 flickers for a split second - I'm not happy about it. — Sergey Aldoukhov, Oct 05 '10 at 05:48

score 2 · Answer 3 · answered Sep 30 '10 at 21:49

If you are using the hardware back button, then no there is no direct way to do this.

You could always use the navigate method to go directly to page one.

  NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.RelativeOrAbsolute));

That will get you to the first page but it will also add page 3 to the back stack.

In WPF you can always use the RemoveBackEntry() method to clear items from the back stack but unfortunately it's not available in Silverlight for the phone.

score 1 · Answer 4 · answered Jul 11 '11 at 07:11

1

I recommend overiding the back button key press to direct the user where you want them to go:

protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e) { NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative)); }

answered Jul 11 '11 at 07:11

Pete Stockley

11
1

This leads to writing your own navigation ;) Once you applied this pattern, you need to maintain it for every back navigation. – Sergey Aldoukhov Jul 13 '11 at 17:44

score 1 · Answer 5 · edited May 23 '17 at 12:22

1

You can now remove pages from the back stack directly. See this thread for more information:

Clearing backstack in NavigationService

edited May 23 '17 at 12:22

Community

1
1

answered Nov 25 '11 at 12:07

Pete Stockley

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1

score 0 · Answer 6 · answered Jun 21 '13 at 07:29

0

You should create "Loaded" event for your page

    private void LayoutRoot_Loaded(object sender, RoutedEventArgs e)
    {
        try { while (NavigationService.RemoveBackEntry() != null) ; }
        catch (System.NullReferenceException ex) { }
    }

answered Jun 21 '13 at 07:29

Sorokin Andrey

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score 0 · Answer 7 · answered Sep 28 '10 at 06:50

0

Instead of Page #2 navigating specifically to Page #1 consider using this code:-

NavigationService.GoBack();

answered Sep 28 '10 at 06:50

AnthonyWJones

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How to remove a page from the navigation history?

7 Answers7