wpf 事件触发器

做动画效果

鼠标放button上面，字段变大

 在故事板里创建一个动画，  在0-0.2s内，字体变大

  <Window.Resources>
          
        <Style x:Key="defaultstyle" TargetType="Button"  >
            <Setter Property="FontSize" Value="20"></Setter>
            <Setter Property="Width" Value= "200" ></Setter>
            <Style.Triggers>
                <EventTrigger RoutedEvent="Mouse.MouseEnter">
                    <EventTrigger.Actions>
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation Duration="0:0:0.2" Storyboard.TargetProperty="FontSize" To="30">
                                    
                                </DoubleAnimation>
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger.Actions>
                </EventTrigger>
            </Style.Triggers>
            
             
        </Style>
    </Window.Resources>

    <Grid>
        <StackPanel>
            <Button Style="{StaticResource defaultstyle}" Content="Button1" />
            <Button Style="{StaticResource defaultstyle}" Content="Button2"  />
            <Button Style="{StaticResource defaultstyle}" Content="Button3"   />
        </StackPanel>
    </Grid>

最后

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