EventTrigger

EventTrigger 和 Storyboard

另一种类型的触发器是 EventTrigger，它根据事件的引发来启动一组操作。 例如，下面的 EventTrigger 对象指定当鼠标指针进入 ListBoxItem 时，MaxHeight属性在 0.2 秒时间内以动画方式增大为值 90。 当鼠标离开该项时，该属性在 1 秒时间内还原为原始值。 请注意为何无需为 MouseLeave 动画指定 To 值。这是因为动画能够跟踪原始值。

 

  <EventTrigger RoutedEvent="Mouse.MouseEnter">
          <EventTrigger.Actions>
            <BeginStoryboard>
              <Storyboard>
                <DoubleAnimation
                  Duration="0:0:0.2"
                  Storyboard.TargetProperty="MaxHeight"
                  To="90"  />
              </Storyboard>
            </BeginStoryboard>
          </EventTrigger.Actions>
        </EventTrigger>
        <EventTrigger RoutedEvent="Mouse.MouseLeave">
          <EventTrigger.Actions>
            <BeginStoryboard>
              <Storyboard>
                <DoubleAnimation
                  Duration="0:0:1"
                  Storyboard.TargetProperty="MaxHeight"  />
              </Storyboard>
            </BeginStoryboard>
          </EventTrigger.Actions>
  </EventTrigger>---转自MSDN，样式设置和模版化

来源：https://www.cnblogs.com/Plantastic/archive/2013/05/04/3059862.html