I'm unable to do absolute navigation to a NavigationPage in Prism 9.0.401-pre

[delaney31]

Prior to 9.0.401 we were able to navigate to a MasterPage(FlyOut Page) with a NavigationPage that contained our MainPage like this:
var result = await _navigationService.NavigateAsync("/MasterPage/NavigationPage/MainPage");
Debug.WriteLine($"Navigate to MainPage result: {result}");

Now this code is returning a error: "Page to remove must be contained on this Navigation Page"

I tracked it down to the RemovePage call in ProcessNavigationForNavigationPage in NavigationService

    var clearNavigationStack = GetClearNavigationPageNavigationStack(currentPage);
    var isEmptyOfNavigationStack = currentPage.Navigation.NavigationStack.Count == 0;

    List<Page> destroyPages;
    if (clearNavigationStack && !isEmptyOfNavigationStack)
    {
        destroyPages = currentPage.Navigation.NavigationStack.ToList();
        destroyPages.Reverse();

        await currentPage.Navigation.PopToRootAsync(false);
    }
    else
    {
        destroyPages = new List<Page>();
    }

    var topPage = currentPage.Navigation.NavigationStack.LastOrDefault();
    var nextPageType = Registry.GetViewType(UriParsingHelper.GetSegmentName(nextSegment));
    if (topPage?.GetType() == nextPageType)
    {
        if (clearNavigationStack)
            destroyPages.Remove(destroyPages.Last());

        if (segments.Count > 0)
            await UseReverseNavigation(topPage, segments.Dequeue(), segments, parameters, false, animated);

        await DoNavigateAction(topPage, nextSegment, topPage, parameters, onNavigationActionCompleted: (p) =>
        {
            if (nextSegment.Contains(KnownNavigationParameters.SelectedTab))
            {
                var segmentParams = UriParsingHelper.GetSegmentParameters(nextSegment, parameters);
                SelectPageTab(topPage, segmentParams);
            }
        });
    }
    else
    {
        await UseReverseNavigation(currentPage, nextSegment, segments, parameters, false, animated);

        if (clearNavigationStack && !isEmptyOfNavigationStack)
        {
                currentPage.Navigation.RemovePage(topPage);
        }
    }

    foreach (var destroyPage in destroyPages)
    {
        MvvmHelpers.DestroyPage(destroyPage);
    }
}

[dansiegel]

You might check the E2E app for Maui. This is literally a scenario that works there where we do an absolute navigation to a FlyoutPage and from the FlyoutPage.

[delaney31]

Thanks. I was able to resolve this using the sample app. The issue was that we were registering the NavigationPage in the Container which I guess you don't need to do anymore.

[negberts]

@delaney31 thanks! This helped me out too!