【IT168技术文档】第三种方法，DispatcherTimer动画，该类型动画与CompositionTarget动画类似，是基于界面线程的逐帧动画，但他与CompositionTarget动画不同，DispatcherTimer动画可以轻松的进行参数设置：
xaml界面代码仍然沿用第一节的，那么接下来我们在后台代码中创建相关对象：
Rectangle rect; //创建一个方块作为演示对象
double speed = 5; //设置移动速度
Point moveTo; //设置移动目标
public Window3() {
InitializeComponent();
rect = new Rectangle();
rect.Fill = new SolidColorBrush(Colors.Red);
rect.Width = 50;
rect.Height = 50;
rect.RadiusX = 5;
rect.RadiusY = 5;
Carrier.Children.Add(rect);
Canvas.SetLeft(rect, 0);
Canvas.SetTop(rect, 0);
//定义线程
DispatcherTimer dispatcherTimer = new DispatcherTimer(DispatcherPriority.Normal);
dispatcherTimer.Tick += new EventHandler(Timer_Tick);
dispatcherTimer.Interval = TimeSpan.FromMilliseconds(50); //重复间隔
dispatcherTimer.Start();
}
private void Carrier_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) {
moveTo = e.GetPosition(Carrier);
}
private void Timer_Tick(object sender, EventArgs e) {
double rect_X = Canvas.GetLeft(rect);
double rect_Y = Canvas.GetTop(rect);
Canvas.SetLeft(rect, rect_X + (rect_X < moveTo.X ? speed : -speed));
Canvas.SetTop(rect, rect_Y + (rect_Y < moveTo.Y ? speed : -speed));
}
原文地址：http://www.cnblogs.com/alamiye010/archive/2009/06/17/1505331.html
