silverlight RenderTransform 后台动画设置
myBall.RenderTransform = new TranslateTransform();
Storyboard sb = new Storyboard();
DoubleAnimation da = new DoubleAnimation();
da.From = 0;
da.To = 1000;
da.RepeatBehavior = RepeatBehavior.Forever;
da.Duration = new Duration(new TimeSpan(0, 0, 2));
Storyboard.SetTarget(da, myBall);
Storyboard.SetTargetProperty(da, new PropertyPath("(FrameworkElement.RenderTransform).(TranslateTransform.X)"));
sb.Children.Add(da);
//myBall.Resources.Add("sb1", sb);
sb.Begin();