Wpf一个简单的物体移动动画

[html]
<window x:class="wpfdemo1.mainwindow" 
        xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml" 
        title="mainwindow" height="350" width="525" loaded="window_loaded" mouseleftbuttondown="window_mouseleftbuttondown"> 
    <canvas x:name="body"> 
         
         
         
    </canvas> 
</window> 

[csharp] 
/// <summary> 
    /// mainwindow.xaml 的交互逻辑 
    /// </summary> 
    public partial class mainwindow : window 
    { 
        ellipse ell; 
 
        public mainwindow() 
        { 
            initializecomponent(); 
 
            ell = new ellipse(); 
 
            ell.fill = new solidcolorbrush(colors.red); 
            ell.width = 50; 
            ell.height = 50; 
 
            body.children.add(ell); 
 
            canvas.setleft(ell, 100); 
            canvas.settop(ell,100); 
 
        } 
 
        private void window_loaded(object sender, routedeventargs e) 
        { 
             
        } 
 
        private void window_mouseleftbuttondown(object sender, mousebuttoneventargs e) 
        { 
            moveto(e.getposition(body)); 
        } 
 
 
        private void moveto(point deskpoint) 
        { 
            //point p = e.getposition(body); 
 
            point curpoint = new point(); 
            curpoint.x = canvas.getleft(ell); 
            curpoint.y = canvas.gettop(ell); 
 
            double _s = system.math.sqrt(math.pow((deskpoint.x - curpoint.x), 2) + math.pow((deskpoint.y - curpoint.y), 2)); 
 
            double _secnumber = (_s / 1000) * 500; 
 
            storyboard storyboard = new storyboard(); 
 
            //创建x轴方向动画 
 
            doubleanimation doubleanimation = new doubleanimation( 
 
              canvas.getleft(ell), 
 
              deskpoint.x, 
 
              new duration(timespan.frommilliseconds(_secnumber)) 
 
            ); 
            storyboard.settarget(doubleanimation, ell); 
            storyboard.settargetproperty(doubleanimation, new propertypath("(canvas.left)")); 
            storyboard.children.add(doubleanimation); 
 
            //创建y轴方向动画 
 
            doubleanimation = new doubleanimation( 
              canvas.gettop(ell), 
              deskpoint.y, 
              new duration(timespan.frommilliseconds(_secnumber)) 
            ); 
            storyboard.settarget(doubleanimation, ell); 
            storyboard.settargetproperty(doubleanimation, new propertypath("(canvas.top)")); 
            storyboard.children.add(doubleanimation); 
 
 
 
            //动画播放 
 
            storyboard.begin(); 
        } 
    } 

通过动画析storyboard实现元素移动功能。