UWP Page navigation indentifier

Question

Hello in UWP I can navigate to another page like:

Frame.Navigate(typeof(AnotherPage), someObject);

and in AnotherPage if I want to retrieve the object:

protected override void OnNavigationTo(NavigationEventArgs e) {
    SomeObject someObject = (SomeObject) e.Parameter;
    //here I would like to know from what page I am navigating
}

Could you tell me how to find out from what page am I navigating? Thanks.

Answer 1

When navigation is done, the previous page gets put on the Frame's BackStack, simply query that collection.

protected override void OnNavigatedTo(NavigationEventArgs e)
{
    SomeObject someObject = (SomeObject)e.Parameter;

    PageStackEntry previousPage = Frame.BackStack.Last();
    Type previousPageType = previousPage?.SourcePageType;

    base.OnNavigatedTo(e);
}