windows-phone-7 - 想要将故事板目标属性设置为滚动查看器的水平偏移量

Question

我在我的应用程序中使用滚动查看器，它以水平视图显示图像。我需要在滚动时使用动画，就像在这个视频中一样如何实现这一点

http://www.youtube.com/watch?v=XVHVBMeqL24

我试过这个

   public Storyboard CreateAndApplyStoryboard(UIElement targetElement)
    {

        Storyboard sb = new Storyboard();


        DoubleAnimation animation =
            new DoubleAnimation { From = 0, To = 500, Duration = new Duration(TimeSpan.FromSeconds(1.0)) };

        //ExponentialEase ese = new ExponentialEase();
        //ese.EasingMode = EasingMode.EaseIn;
        //animation.EasingFunction = ese;
        Storyboard.SetTarget(animation, targetElement);
        Storyboard.SetTargetProperty(animation,
            new PropertyPath(ScrollViewer.HorizontalOffsetProperty));



        sb.Children.Add(animation);
        return sb;
    }

我只是展示我需要从水平偏移量 0 滚动到 500 的示例

如何使用依赖属性？

  <scrollviewer name="scroll">
  <StackPanel Name="stack" Width="5000" Orientation="Horizontal"  HorizontalAlignment="Left" >
        <StackPanel.RenderTransform>
                <TranslateTransform x:Name="Trans2" X="0" Y="0" />
            </StackPanel.RenderTransform>
    </StackPanel>

private void button1_Click(object sender, RoutedEventArgs e)
    {                                 
            Storyboard sb = CreateAndApplyStoryboard(scroll);
            sb.Begin();

        }