Question

I’m developing an aplication for Windows 7, and I need to block a page.. my solutions are not register that frame or clear all the frames in back.

Answer 1

Guessing that you mean you have a page on the Back-stack that you want to remove —

In the new Mango SDK, there’s a Method you can try NavigationService.RemoveBackEntry

However it might be easier to just use a boolean and check in OnNavigatedTo:

At page where you need to go back > 1 pages:

in App.xaml.cs:

public static bool IsBackwardNavigation = false;
public static string PageContext = string.Empty;

Page2.xaml.cs :

public void YourFunction()
{
App.PageContext = "MainPage";
App.IsBackwardNavigation = true;

if (NavigationService.CanGoBack)
   NavigationService.GoBack();
}

And in each page’s OnNavigatedTo:

Page1.xaml.cs:
    string Page1 = "Page1";

        protected override void OnNavigatedTo(object sender, NavigationEventArgs e)
        {
           if (App.IsBackwardNavigation)
    {

    if (!Page1.Equals(App.NavigationContext)
        {
//since this page's name is not the correct page, the page will go back again.
        if (NavigationService.CanGoBack)
           NavigationService.GoBack();
        }
        else
        {
//this is the page we're trying to get to
        App.IsBackwardNavigation = false;
        App.NavigationContext = string.Empty;


        }

    } 
        }
    }