Storyboard使用随笔

Sliverlight情景下使用

方法一、 使用VisualStateManager 技术，调用 GoToState()

 XAML代码:

  <Grid x:Name="LayoutRoot" Background="White">        
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="myButtonStates">
                <VisualState x:Name="Normal"></VisualState>
                <VisualState x:Name="Changed">
                    <Storyboard>
                        <DoubleAnimation Storyboard.TargetName="myButton" Storyboard.TargetProperty="Width"  To="400" Duration="00:00:01">
                        </DoubleAnimation>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
        <Button  Width="100" Height="30" Content="点击我,让我长大" Click="Button_Click" x:Name="myButton"/>   
    </Grid>

C#代码:

     private void Button_Click(object sender, RoutedEventArgs e)
        {
            System.Windows.VisualStateManager.GoToState(this, "Changed", true);
        }

方法二、将Storyboard放在页面 Resources 

 XAML代码:

   <Grid x:Name="LayoutRoot" Background="White">     
        <Grid.Resources>
            <Storyboard x:Name="myButtonChanged">
                <DoubleAnimation Storyboard.TargetName="myButton" Storyboard.TargetProperty="Width"  To="400" Duration="00:00:01">
                </DoubleAnimation>
            </Storyboard>
        </Grid.Resources>
        <Button  Width="100" Height="30" Content="点击我,让我长大" Click="Button_Click" x:Name="myButton"/>   
    </Grid>

C#代码:

  private void Button_Click(object sender, RoutedEventArgs e)
        {
            Storyboard sb = LayoutRoot.Resources["myButtonChanged"] as Storyboard;
            sb.Begin();
        }

WPF情景下使用

方法一,事件触发器

<Grid>
        <Button  Width="100" Height="30" Content="点击我,让我长大"  x:Name="myButton">
            <Button.Triggers>
                <EventTrigger RoutedEvent="Button.Click">
                    <BeginStoryboard>                        
                        <Storyboard >
                            <DoubleAnimation To="400" Storyboard.TargetName="myButton" Storyboard.TargetProperty="Width" Duration="00:00:05">
                             </DoubleAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Button.Triggers>
        </Button>
    </Grid>

 方法二,样式触发器

  <Grid>
        <Grid.Resources>
            <Style x:Key="ButtonStyle">
                <Style.Triggers>
                    <Trigger Property="Button.IsPressed"  Value="True">
                        <!--Trigger.EnterActions当设置的属性改变到指定的值时,执行(此示例是IsPressed的值为True时)-->
                        <Trigger.EnterActions> 
                            <BeginStoryboard>
                                <Storyboard>
                                    <DoubleAnimation To="400" Duration="00:00:02" Storyboard.TargetProperty="Width"></DoubleAnimation>
                                </Storyboard>
                            </BeginStoryboard>
                        </Trigger.EnterActions>
                        <!--Trigger.ExitActions当设置的属性还原时执行(此示例IsPressed的值回到False时)-->
                        <Trigger.ExitActions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <DoubleAnimation To="100" Duration="00:00:02" Storyboard.TargetProperty="Width"></DoubleAnimation>
                                </Storyboard>
                            </BeginStoryboard>
                        </Trigger.ExitActions>
                    </Trigger>
                </Style.Triggers>
            </Style>
        </Grid.Resources>
        <Button  Width="100" Height="30" Content="按住鼠标,按钮宽度长大,松开,还原"   x:Name="myButton" Style="{StaticResource ButtonStyle}">
   
        </Button>
    </Grid>

源码