Question

I am making a top notification animation, but I don’t know how to make the animation synchronous until the animation finishes. Here is the code I have:

public Storyboard prepareShowStory(int count, NotificationControl notifyControl)
        {
            notifyControl.textBlock1.Text = "Got" + count.ToString() + "Message";

            notifyControl.RenderTransform = new CompositeTransform();
            Storyboard story = new Storyboard();
           //From here until the annimation finish and remove LayoutRoot.Resources.Clear();
            LayoutRoot.Resources.Add("unique_id", story);

            story.Completed += (object sender, EventArgs e) =>
            {
                story.Stop();
                story.Children.Clear();
                App.ViewModel.myAction -= CompletedRefresh;
                LayoutRoot.Resources.Clear();
                 //To here.
            };
            story.Begin();

            DoubleAnimation animation;
            animation = new DoubleAnimation();
            animation.AutoReverse = true;
            animation.From = -64;
            animation.To = 60;
            animation.Duration = new Duration(TimeSpan.FromMilliseconds(1600));
            animation.EasingFunction = _EasingFunction;
            Storyboard.SetTargetName(animation, notifyControl.Name);
            Storyboard.SetTargetProperty(animation, new PropertyPath("(UIElement.RenderTransform).(CompositeTransform.TranslateY)"));
            story.Children.Add(animation);

            return story;
        }

Answer 1

You could check the ResourceDictionary before adding to it.

if(!LayoutRoot.Resources.Contains("unique_id"))
   LayoutRoot.Resources.Add("unique_id", story);