[silverlight基础]仿文字连接跑马灯效果-高手绕道

运行效果如下:

分析示意图：

代码:

 <Canvas x:Name="a" Background="AliceBlue" MouseEnter="a_MouseEnter" MouseLeave="a_MouseLeave" Cursor="Hand" >
           <Canvas.Clip>
               <RectangleGeometry RadiusX="0" RadiusY="0" Rect="50,50, 300,50" />
           </Canvas.Clip>
           <Canvas.Triggers>
               <EventTrigger RoutedEvent="Canvas.Loaded" >
                   <BeginStoryboard>
                       <Storyboard x:Name="animation" Storyboard.TargetProperty="(Canvas.Left)" RepeatBehavior="Forever" >
                           <DoubleAnimation Storyboard.TargetName="txt1" From="50" To="-500" Duration="0:0:10"  />
                           <DoubleAnimation Storyboard.TargetName="txt2" From="600" To="50" Duration="0:0:10"  />
                       </Storyboard>
                   </BeginStoryboard>
               </EventTrigger>
           </Canvas.Triggers>
           <TextBlock x:Name="txt1"  FontSize="36" Foreground="Green" Text="1 2 3 4 5 6 7 8 9 0 a b c d e f " Canvas.Top="50" Width="550" Height="50"/>
           <TextBlock x:Name="txt2"  FontSize="36" Foreground="Red" Text="1 2 3 4 5 6 7 8 9 0 a b c d e f " Canvas.Top="50" Width="550" Height="50"/>
       </Canvas>

解释一下:

1.先创建了一个裁减区(起始坐标为50,50,宽度为300,高度为50)--这是必须的，否则超过这个区域的文字也会显示出来

2.Storyboard中对二段文字对象的Canvas.Left进行了变化，即完成左移

3.RepeatBehavior="Forever"表示这段动画将一直播放下去（即视觉上好象文字在一起向左滚动）