旋转动画 sl解决方案

        public Rotate()
        {
            InitializeComponent();
            Rectangle r = new Rectangle();
            r.Width = 10;
            r.Height = 50;
            r.Fill = new SolidColorBrush(Colors.Red);
            Canvas.SetLeft(r, 100);
            Canvas.SetTop(r, 100);

            RotateTransform rt = new RotateTransform();
            rt.CenterX = 0;
            rt.CenterY = 0;
            rt.Angle = 90;

            r.RenderTransform = rt;

            LayoutRoot.Background = new SolidColorBrush(Colors.Gray);
            LayoutRoot.Children.Add(r);

            Rectangle r1 = new Rectangle();
            r1.Width = 10;
            r1.Height = 50;
            r1.Fill = new SolidColorBrush(Colors.Blue);
            Canvas.SetLeft(r1, 100);
            Canvas.SetTop(r1, 100);
            LayoutRoot.Children.Add(r1);

            LayoutRoot.MouseLeftButtonDown += new MouseButtonEventHandler(Mouse_Left_Down);
        }

        protected void Mouse_Left_Down(object sender, EventArgs e)
        {

            Rectangle r=(Rectangle)LayoutRoot.Children[0];

            Storyboard sb = new Storyboard();
            DoubleAnimation da = new DoubleAnimation();
            da.From = ((RotateTransform)(r.RenderTransform)).Angle;
            da.To = 360;
            da.Duration = new Duration(TimeSpan.FromMilliseconds(1000));

            Storyboard.SetTarget(da, r);
            //下面的属性路径不知道怎么写，好像就是这里有问题
            Storyboard.SetTargetProperty(da, new PropertyPath(RotateTransform.AngleProperty));

            sb.Children.Add(da);
            sb.Begin();

        }

   Button myButton;
        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            myButton = new Button();
            myButton.Height = 25;
            myButton.Width = 100;
            myButton.Content = "Click me";
            //myButton.RenderTransformOrigin = new Point(10,10);
            ScaleTransform myScTransform = new ScaleTransform();
            TransformGroup myTransGroup = new TransformGroup();    //要在后面的代码中使用必须先进行注册
            myTransGroup.Children.Add(myScTransform);
            myButton.RenderTransform = myTransGroup;
            myButton.Click += new RoutedEventHandler(myButton_Click);
            LayoutRoot.Children.Add(myButton);
        }

        void myButton_Click(object sender, RoutedEventArgs e)
        {
            Storyboard story = new Storyboard();
            DoubleAnimation yAnimation = new DoubleAnimation();
            yAnimation.From = 0.5;
            yAnimation.To = 1.0;
            yAnimation.Duration = new Duration(TimeSpanFrom5));

           ScaleTransform transY = (ScaleTransform)((TransformGroup)myButton.RenderTransform).Children[0]; //找到你注册的属性

            Storyboard.SetTarget(yAnimation, transY);
            Storyboard.SetTargetProperty(yAnimation, new PropertyPath(ScaleTransform.ScaleYProperty));
            
            story.Children.Add(yAnimation);
            story.Begin();
        }

------解决方案--------------------

C# code

protected void Mouse_Left_Down(object sender, EventArgs e)
{
TransformGroup group = new TransformGroup( );
RotateTransform rotate = new RotateTransform( );  //旋转
group.Children.Add( rotate );

this.btn2.RenderTransform = group;
//确定中心点
this.btn2.RenderTransformOrigin = new Point( 0.5 , 0.5 );



//创建关键帧
DoubleAnimationUsingKeyFrames angle = new DoubleAnimationUsingKeyFrames( );
//创建各个帧的动画效果
SplineDoubleKeyFrame spTranslate = new SplineDoubleKeyFrame( 180 , KeyTime.FromTimeSpan( new TimeSpan( 0 , 0 , 0 , 0 , 800 ) ) , new KeySpline( 0 , 0 , 1 , 1 ) );
//将单独的帧插入到关键帧中
angle.KeyFrames.Add( spTranslate );
//定义故事版
Storyboard story = new Storyboard( );
//将关键帧放入控件中
Storyboard.SetTarget( angle , this.btn2 );
//定义动画类型------此处就是你说的路径，children后面的[0]旋转插入到group的位置
Storyboard.SetTargetProperty( angle , new PropertyPath( "(Button.RenderTransform).(TransformGroup.Children)[0].(RotateTransform.Angle)" ) );
//将关键帧加入故事版
story.Children.Add( angle );

//运行故事版
story.Begin( );
}