CODEWITHSUNDEEP
c#xamarinxamarin.forms
ispiro
ispiro

Reputation: 27643

Check if ContentPage is currently shown

Is there a way to tell if a ContentPage is currently shown?

I need code inside an event handler in the ContentPage to check whether the page is currently shown and act accordingly.

Upvotes: 2

Views: 3611

Answers (4)

YMC
YMC

Reputation: 5452

If you use Shell as your MainPage, you can run

  bool isOnMyPage = Shell.Current.CurrentPage == MyPage

Upvotes: 0

sme
sme

Reputation: 4153

You can listen to the NavigationPage's Pushed and Popped events, like so:

((Xamarin.Forms.NavigationPage)MyProject.App.Current.MainPage).Pushed += (s, e) => 
{
    if (e.Page is ContentPage)
    {
        // Do what you gotta do
    }

    // or, for a specific page:
    if (e.Page is MyProject.Views.MyCustomPage)
    {
        // Do what you gotta do
    }
};

Of course, this will only be called when the page is pushed onto the navigation stack; If you need it to be called each time the page appears on the screen, then go with what GBreen12 or hvaughan3 said.

Upvotes: 2

hvaughan3
hvaughan3

Reputation: 11105

In addition to GBreen12's answer, you could also do it this way...

bool isShowingMyPage = Application.Current.MainPage is MyPage || (Application.Current.MainPage is NavigationPage navPage && navPage.CurrentPage is MyPage); //If you are using a MasterDetailPage or something else, then you would have to handle this differently

//I think the below will work for checking if any modals are showing over your page but you should definitely test it in different scenarios to make sure. I am not sure if the modal is immediately removed from ModalStack when it gets popped or not

isShowingMyPage = Application.Current.MainPage?.Navigation?.ModalStack?.LastOrDefault() == null;

Upvotes: 5

GBreen12
GBreen12

Reputation: 1900

You can override OnAppearing which is called anytime the page is about to be shown:

Page lifecycle events in xamarin.forms

Upvotes: 2

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