Xamarin.Forms - Master/detail page and navigation history issue

Question

I have an app which uses masterdetail page to show menu in all page. The navigation is happened in two way in my app. one from the menu and second way from Dashboard. so if i navigate to another page, and then press "BACK" button, it closes the application. It does not remember the navigation history. The master detail page is as below:

 public class RootPage : MasterDetailPage
    {
        public RootPage ()
        {
            var menuPage = new MenuPage ();

            menuPage.Menu.ItemSelected += (sender, e) => NavigateTo (e.SelectedItem as MenuItem);

            Master = menuPage;
            Detail = new NavigationPage (new ContractsPage ());
        }

        void NavigateTo (MenuItem menu)
        {
            Page displayPage = (Page)Activator.CreateInstance (menu.TargetType);
            Detail =    new NavigationPage (displayPage);
            IsPresented = false;
        }
    }

so any ideas how to overcome this problem?

Answer 1

Like what @Sten-Petrov said: you are replacing the detail page and not triggering the history mechanism. To trigger the history mechanism you will need to do a PushAsync(Page) on the Navigation property of the Detail page.

In your example, change NavigateTo:

 void NavigateTo (MenuItem menu)
 {
     Page displayPage = (Page)Activator.CreateInstance (menu.TargetType);
     Detail.Navigation.PushAsync(displayPage);
 }

This will not replace the content but will bring up a new page with the back button functionality you want.

If you want back button functionality with the Master-Detail page then you'll need to customize the back stack process which, in my opinion, is not worth it. Just move to a different page/navigation structure in that case.