如何：在演示图板启动之后使用事件触发器来控制演示图板

更新：2007 年 11 月

此示例演示如何在 Storyboard 启动后对它进行控制。若要使用 XAML 启动 Storyboard，请使用 BeginStoryboard，它可以将动画分发到要进行动画处理的对象和属性，然后启动 Storyboard。如果通过指定 BeginStoryboard 的 Name 属性为它提供一个名称，则它将成为可控制的 Storyboard。然后，可以在 Storyboard 启动后以交互方式对它进行控制。

将以下 Storyboard 操作与 EventTrigger 对象一起使用可以控制 Storyboard。

• PauseStoryboard：暂停 Storyboard。

• ResumeStoryboard：继续暂停的 Storyboard。

• SetStoryboardSpeedRatio：更改 Storyboard 速度。

• SkipStoryboardToFill：使 Storyboard 前进到其填充期的末尾（如果有填充期）。

• StopStoryboard：停止 Storyboard。

• RemoveStoryboard：移除 Storyboard，释放资源。

示例

下面的示例使用可控制的 Storyboard 操作来以交互方式控制 Storyboard。

**注意：**若要查看使用代码控制 Storyboard 的示例，请参见如何：在演示图板启动后对其进行控制。

<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
  WindowTitle="Controlling a Storyboard" >
  <StackPanel Margin="20" >

    <!-- This rectangle is animated. -->
    <Rectangle Name="myRectangle"
      Width="100" Height="20" Margin="12,0,0,5" Fill="#AA3333FF" HorizontalAlignment="Left" />

    <!-- This StackPanel contains all the Buttons. -->
    <StackPanel Orientation="Horizontal" Margin="0,30,0,0">

      <Button Name="BeginButton">Begin</Button>
      <Button Name="PauseButton">Pause</Button>
      <Button Name="ResumeButton">Resume</Button>
      <Button Name="SeekButton">Seek</Button>
      <Button Name="SkipToFillButton">Skip To Fill</Button>
      <Button Name="SetSpeedRatioButton">Triple Speed</Button>
      <Button Name="StopButton">Stop</Button>

      <StackPanel.Triggers>

        <!-- Begin the Storyboard -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="BeginButton">
          <BeginStoryboard Name="MyBeginStoryboard">
            <Storyboard >
              <DoubleAnimation 
                Storyboard.TargetName="myRectangle" 
                Storyboard.TargetProperty="Width" 
                Duration="0:0:5" From="100" To="500" />
            </Storyboard>
          </BeginStoryboard>
        </EventTrigger>

        <!-- Pause the Storyboard -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="PauseButton">
          <PauseStoryboard BeginStoryboardName="MyBeginStoryboard" />
        </EventTrigger>

        <!-- Resume the Storyboard -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="ResumeButton">
          <ResumeStoryboard BeginStoryboardName="MyBeginStoryboard" />
        </EventTrigger>

         <!-- Seek one second into the storyboard's active period. -->
         <EventTrigger RoutedEvent="Button.Click" SourceName="SeekButton">
           <SeekStoryboard 
            BeginStoryboardName="MyBeginStoryboard" 
            Offset="0:0:1" Origin="BeginTime" />
        </EventTrigger>   

        <!-- Skip to Fill -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="SkipToFillButton">
          <SkipStoryboardToFill BeginStoryboardName="MyBeginStoryboard" />
        </EventTrigger>

        <!-- Stop the Storyboard -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="StopButton">
          <StopStoryboard BeginStoryboardName="MyBeginStoryboard" />
        </EventTrigger>

        <!-- Triple the speed of the Storyboard -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="SetSpeedRatioButton">
          <SetStoryboardSpeedRatio SpeedRatio="3" BeginStoryboardName="MyBeginStoryboard" />
        </EventTrigger>
      </StackPanel.Triggers>
    </StackPanel>
  </StackPanel>
</Page>

有关其他示例，请参见动画示例库。

请参见

任务

如何：在演示图板启动后对其进行控制

概念

动画概述

演示图板概述

参考

ResumeStoryboard

SetStoryboardSpeedRatio

SkipStoryboardToFill

PauseStoryboard

StopStoryboard

SeekStoryboard