WPF中触发器（Trigger、DataTrigger）使用动画最简单的方式EnterActions和ExitsActions

1.当鼠标移入后执行某个动画：

<DataTrigger Binding="{Binding Tag,RelativeSource={RelativeSource Self},Converter={StaticResource DictionaryConverter},ConverterParameter=Type}" Value="Scan">
<DataTrigger.EnterActions>
<BeginStoryboard>
<Storyboard RepeatBehavior="Forever" x:Name="leftRightSB">
<DoubleAnimation Storyboard.TargetName="tt" Storyboard.TargetProperty="(TranslateTransform.X)" From="0" To="10" Duration="0:0:0.3" BeginTime="0:0:0.0"/>
<DoubleAnimation Storyboard.TargetName="tt" Storyboard.TargetProperty="(TranslateTransform.X)" From="10" To="0" Duration="0:0:0.3" BeginTime="0:0:0.3"/>
<DoubleAnimation Storyboard.TargetName="tt" Storyboard.TargetProperty="(TranslateTransform.X)" From="0" To="-10" Duration="0:0:0.3" BeginTime="0:0:0.6"/>
<DoubleAnimation Storyboard.TargetName="tt" Storyboard.TargetProperty="(TranslateTransform.X)" From="-10" To="0" Duration="0:0:0.3" BeginTime="0:0:0.9 "/>
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
<DataTrigger.ExitActions>
<BeginStoryboard>
<Storyboard RepeatBehavior="Forever">
<DoubleAnimation Storyboard.TargetName="tt" Storyboard.TargetProperty="(TranslateTransform.Y)" To="0" Duration="0:0:0.01"/>
</Storyboard>
</BeginStoryboard>
</DataTrigger.ExitActions>
</DataTrigger>

View Code

**特别注意：

由于EventTrigger本身就是路由事件触发器，路由事件可以通过VS查阅API获得，

查询的方式，如：

　　　　Button通过F12看到按钮的公开代码，Button自身没有RoutedEvent，然后查询其父类ButtonBase，有一个ClickEvent;

再查询ButtonBase的父类ContentControl...一直到UIElement类，你就会发现很多RoutedEvent。

EnterActions和ExitActions不能用于EventTrigger，否则会报错Event triggers do not support EnterActions or ExitActions.