protected override void OnNavigatedTo(Microsoft.UI.Xaml.Navigation.NavigationEventArgs e)
{
base.OnNavigatedTo(e);
if (e.Parameter == null)
{
throw new InvalidOperationException($"Cannot navigate to {nameof(FormsEmbeddedPageWrapper)} without "
+ $"providing a {nameof(Xamarin.Forms.Page)} identifier.");
}
// Find the page instance in the dictionary and then discard it so we don't prevent it from being collected
var key = (Guid)e.Parameter;
var page = Pages[key];
Pages.Remove(key);
// Convert that page into a FrameWorkElement we can display in the ContentPresenter
FrameworkElement frameworkElement = page.CreateFrameworkElement();
if (frameworkElement == null)
{
throw new InvalidOperationException($"Could not find or create a renderer for the Page {page}");
}
Root.Content = frameworkElement;
}
protected override void OnNavigatedFrom(Microsoft.UI.Xaml.Navigation.NavigationEventArgs e)
{
base.OnNavigatedFrom(e);
Root.Content = null;
}
protected override void OnNavigatedTo(Microsoft.UI.Xaml.Navigation.NavigationEventArgs e)
{
base.OnNavigatedTo(e);
LoadPage();
}