[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:

 1      < Canvas  x:Name ="a"  Background ="AliceBlue"  MouseEnter ="a_MouseEnter"  MouseLeave ="a_MouseLeave"  Cursor ="Hand"   >
 2              < Canvas.Clip >
 3                  < RectangleGeometry  RadiusX ="0"  RadiusY ="0"  Rect ="50,50, 300,50"   />
 4              </ Canvas.Clip >
 5              < Canvas.Triggers >
 6                  < EventTrigger  RoutedEvent ="Canvas.Loaded"   >
 7                      < BeginStoryboard >
 8                          < Storyboard  x:Name ="animation"  Storyboard.TargetProperty ="(Canvas.Left)"  RepeatBehavior ="Forever"   >
 9                              < DoubleAnimation  Storyboard.TargetName ="txt1"  From ="50"  To ="-500"  Duration ="0:0:10"    />
10                              < DoubleAnimation  Storyboard.TargetName ="txt2"  From ="600"  To ="50"  Duration ="0:0:10"    />
11                          </ Storyboard >
12                      </ BeginStoryboard >
13                  </ EventTrigger >
14              </ Canvas.Triggers >
15              < 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" />
16              < 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" />
17          </ 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）