    var widthAnimation = new DoubleAnimation() { To = 250, FillBehavior = FillBehavior.Stop };
    var opacityAnimation = new DoubleAnimation() { From = 1, To = 0, FillBehavior = FillBehavior.Stop };

    var storyBoard = new Storyboard() { Duration = TimeSpan.FromSeconds(2) };
    storyBoard.Children.Add(widthAnimation);
    storyBoard.Children.Add(opacityAnimation);

    Storyboard.SetTargetProperty(widthAnimation, new PropertyPath("Width"));
    Storyboard.SetTargetProperty(opacityAnimation, new PropertyPath("Opacity"));

    storyBoard.Begin(button);

這個例子簡單的演示了如何使用StoryBoard，由于Storyboard經常使用與XAML，這里也介紹一下XAML中的寫法：

    <Storyboard x:Key="storyBoard">
        <DoubleAnimation Storyboard.TargetProperty="Width" To="250" FillBehavior="Stop"/>
        <DoubleAnimation Storyboard.TargetProperty="Opacity" From="1" To="0" FillBehavior="Stop"/>
    </Storyboard>

使用方式如下：

    var storyBoard = this.FindResource("storyBoard") as Storyboard;
    storyBoard.Begin();

控制Storyboard

前面已經介紹過，Storyboard 像Clock方法一樣，直接封裝了Begin、 Seek、 Stop、 Pause、Resume、Remove等幾個函數(shù)，在代碼中可以直接使用。另外，在XAML中，Storyboard是可以直接在觸發(fā)器中（EventTrigger、DataTrigger、Trigger）使用的，如下就是一個簡單的例子：

    <Window.Resources>
        <Storyboard x:Key="storyBoard">
            <DoubleAnimation Storyboard.TargetName="button" Storyboard.TargetProperty="Width" To="250" FillBehavior="Stop"/>
            <DoubleAnimation Storyboard.TargetName="button" Storyboard.TargetProperty="Opacity" From="1" To="0" FillBehavior="Stop"/>
        </Storyboard>
    </Window.Resources>
    <Window.Triggers>
        <EventTrigger RoutedEvent="Loaded" >
            <BeginStoryboard Storyboard="{StaticResource storyBoard}" />
        </EventTrigger>
    </Window.Triggers>

可以看到，這兒用到了一個系統(tǒng)提供的名為BeginStoryboard的TriggerAction，同樣也提供了SeekStoryboard、 StopStoryboard、 PauseStoryboard、ResumeStoryboard、RemoveStoryboard等幾個TriggerAction。一個稍微復雜點的例子如下：

    <Window.Resources>
        <Storyboard x:Key="storyBoard">
            <DoubleAnimation Storyboard.TargetName="button" Storyboard.TargetProperty="Width" To="250" FillBehavior="Stop"/>
            <DoubleAnimation Storyboard.TargetName="button" Storyboard.TargetProperty="Opacity" From="1" To="0" FillBehavior="Stop"/>
        </Storyboard>
    </Window.Resources>
    <Window.Triggers>
        <EventTrigger RoutedEvent="MouseEnter" >
            <BeginStoryboard Name="storyBegin" Storyboard="{StaticResource storyBoard}" />
        </EventTrigger>
        <EventTrigger RoutedEvent="MouseLeave" >
            <RemoveStoryboard BeginStoryboardName="storyBegin" />
        </EventTrigger>
    </Window.Triggers>

另外，微軟提供的Interaction也能在XAML中執(zhí)行Storyboard的控制：

    <i:Interaction.Triggers>
        <i:EventTrigger EventName="MouseEnter">
            <ei:ControlStoryboardAction Storyboard="{StaticResource storyBoard}" ControlStoryboardOption="Play" />
        </i:EventTrigger>
        <i:EventTrigger EventName="MouseLeave">
            <ei:ControlStoryboardAction Storyboard="{StaticResource storyBoard}" ControlStoryboardOption="Stop" />
        </i:EventTrigger>
    </i:Interaction.Triggers>

由于微軟的Interaction擴展在MVVM模式下非常有用，擴展性也非常好，這種方式很多時候更方便。關于Interaction的使用方式，請參看這篇文章：Interaction triggers in WPF