wpf-触发器

1.属性触发器(依赖属性皆可，有个疑问按钮点击一下一直在闪，待研究)

<Style.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property ="Background" Value="Green"/>
                    </Trigger>
</Style.Triggers>

2.MultiTrigger(满足多条件)

<MultiTrigger>
    <MultiTrigger.Conditions>
      <Condition Property="HasItems" Value="false" />
      <Condition Property="Width" Value="Auto" />
    </MultiTrigger.Conditions>
    <Setter Property="MinWidth" Value="120"/>
  </MultiTrigger>

3.DataTrigger与上面相似

      <DataTrigger Binding="{Binding Path=State}" Value="WA">
        <Setter Property="Foreground" Value="Red" />
      </DataTrigger>    
      <MultiDataTrigger>
        <MultiDataTrigger.Conditions>
          <Condition Binding="{Binding Path=Name}" Value="Portland" />
          <Condition Binding="{Binding Path=State}" Value="OR" />
        </MultiDataTrigger.Conditions>
        <Setter Property="Background" Value="Cyan" />
      </MultiDataTrigger>

4.EventTrigger 根据事件触发一组动画

<EventTrigger RoutedEvent="Mouse.MouseLeave">
  <EventTrigger.Actions>
    <BeginStoryboard>
      <Storyboard>
        <DoubleAnimation
          Duration="0:0:1"
          Storyboard.TargetProperty="MaxHeight"  />
      </Storyboard>
    </BeginStoryboard>
  </EventTrigger.Actions>
</EventTrigger>