1.主要代码：
<ControlTemplate.Triggers>
<DataTrigger Binding="{Binding Open,RelativeSource={RelativeSource Self}}" Value="True">
<DataTrigger.EnterActions>
<BeginStoryboard x:Name="sb">
<Storyboard RepeatBehavior="Forever">
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
<DataTrigger.ExitActions>
<StopStoryboard BeginStoryboardName="sb" />
</DataTrigger.ExitActions>
</DataTrigger>
</ControlTemplate.Triggers>
2.源码地址：
https://files.cnblogs.com/files/lizhijian/%E5%8A%A0%E8%BD%BD%E4%B8%AD%E5%8A%A8%E7%94%BB.rar