WPF 触发器（根据属性使用动画）

1.是按钮的边框有闪烁的效果，是根据属性来设置的而非一般的事件

 1  <Style x:Key="PipesButtonStyle" TargetType="Button">

 2             <Setter Property="Height" Value="25"/>

 3             <Setter Property="IsHitTestVisible" Value="False"/>

 4             <Setter Property="Background" Value="Transparent"/>

 5             <Setter Property="Template">

 6                 <Setter.Value>

 7                     <ControlTemplate TargetType="{x:Type Button}">

 8                         <Microsoft_Windows_Themes:ButtonChrome x:Name="Chrome" BorderBrush="Transparent" Background="{TemplateBinding Background}" RenderPressed="{TemplateBinding IsPressed}" RenderDefaulted="{TemplateBinding IsDefaulted}" SnapsToDevicePixels="true"/>

 9                     </ControlTemplate>

10                 </Setter.Value>

11             </Setter>

12             <Setter Property="Effect">

13                 <Setter.Value>

14                     <DropShadowEffect x:Name="effect" BlurRadius="0" Color="Red" Direction="0"

15                                       Opacity="0" RenderingBias="Performance" ShadowDepth="0"/>

16                 </Setter.Value>

17             </Setter>

18             <Style.Triggers>

19                 <Trigger Property="IsHitTestVisible" Value="true">

20                     <Trigger.EnterActions>

21                         <BeginStoryboard x:Name="enterStory">

22                             <Storyboard>

23                                 <DoubleAnimation Storyboard.TargetProperty="(FrameworkElement.Effect).(DropShadowEffect.BlurRadius)"

24                                                  BeginTime="00:00:00" Duration="00:00:01"

25                                                  From="0" To="10" 

26                                                  AutoReverse="True" RepeatBehavior="Forever">

27                                 </DoubleAnimation>

28                                 <DoubleAnimation Storyboard.TargetProperty="(FrameworkElement.Effect).(DropShadowEffect.Opacity)"

29                                                  BeginTime="00:00:00" Duration="00:00:00"

30                                                  From="0" To="1" >

31                                 </DoubleAnimation>

32                             </Storyboard>

33                         </BeginStoryboard>

34                     </Trigger.EnterActions>

35                     <Trigger.ExitActions>

36                         <StopStoryboard BeginStoryboardName="enterStory">

37                         </StopStoryboard>

38                     </Trigger.ExitActions>

39                 </Trigger>

40             </Style.Triggers>

41         </Style>

2.遇到问题：如果我要感觉Content的值来设置Content的值是不行的，会报错。（错误原因为止，有待商榷）