How to check a page is in the navigation stack or not?

Question

User355485 posted

How to check a content page already have on navigation stack or not in xamarin forms?

Answer 1

User42420 posted

@Harshita : You want to check the last page of navigation? Can you ellaborate what you want to perform/implement??

Answer 2

User2148 posted

I think you should use NavigationStack property. https://forums.xamarin.com/discussion/82423/how-to-detect-what-page-is-on-top

Answer 3

User355485 posted

I have a loader popup(working on background),some times it failed to Pop properly.and this time user unable to access application.So I want to pop this popup page after 30 seconds.

private void startTimer()
        {
            int secondsElapsed=0;
            int MaxSeconds = 30;            
            Device.StartTimer(TimeSpan.FromMilliseconds(1000), () =>
            {
                if (secondsElapsed < MaxSeconds)
                {
                    secondsElapsed += 1;
                    return true;
                }
                else
                {
                    Navigation.PopPopupAsync();
                    Navigation.PushPopupAsync(new ErrorPopup("Please try again.","Message"));
                }
                return false;
            });
        }

Answer 4

User42420 posted

@Harshita I dont think there is any method PopPopupAsync. Or this might me a typing error. Now, to show a modal(popup) you have to "PushModalAsync" and to remove it you have to "PopModalAsync".

Answer 5

User290865 posted

@Harshita why u r running this loader popup in the background ?? Instead use rg.plugin.popup for creating your custome loader and use it whenever you want to pop it or push it . if need code reply me!

Answer 6

User349566 posted

@Harshita Hi! did you solve your problem? I'm using Rg.Plugin.Popup as well. I wanna check if one popup is in NavigationStack. So the app knows it can't push again this popup. Except the popup is actually showing in app. But it can't be found in NavigationStacknor in ModalStack.

Have Anyone run into this issue? :#

Answer 7

User349566 posted

Solved: var daStack = Rg.Plugins.Popup.Services.PopupNavigation.Instance.PopupStack;

PopupStack is elsewhere... @IntelliSenseWinsAgain :hushed:

Answer 8

User102046 posted

@Harshita

List<Page> pagesLikeMe = Navigation.NavigationStack.Where(p => p is YourPage).ToList();

bool doesPageExists = Navigation.NavigationStack.Any(p => p is YourPage);

Answer 9

User176749 posted

@Xami3 said: @Harshita

List<Page> pagesLikeMe = Navigation.NavigationStack.Where(p => p is YourPage).ToList();

bool doesPageExists = Navigation.NavigationStack.Any(p => p is YourPage);

that wont work for modal pages. modal pages doent appear in the navigationstack

Answer 10

User2148 posted

Should exists a Stack for Modal pages

Answer 11

User322929 posted

You could do something like this:

var stack = Application.Current.MainPage.Navigation.ModalStack; UserInterfaces.Pages.MyPage page = null; foreach (var item in stack) { if (item is NavigationPage navPage) { if (navPage.CurrentPage is UserInterfaces.Pages.MyPage myPage) { page = myPage; } } }