How to: Use Event Triggers to Control a Storyboard After It Starts


This example shows how to control a Storyboard after it starts. To start a Storyboard by using XAML, use BeginStoryboard, which distributes the animations to the objects and properties they animate and then starts the storyboard. If you give BeginStoryboard a name by specifying its Name property, you make it a controllable storyboard. You can then interactively control the storyboard after it starts.

Use the following storyboard actions together with EventTrigger objects to control a storyboard.

The following example uses controllable storyboard actions to interactively control a storyboard.

Note: To see an example of controlling a storyboard by using code, see Control a Storyboard After It Starts Using Its Interactive Methods.

<Page xmlns=""
  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>

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

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

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

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

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

For additional examples, see the Animation Example Gallery.

Control a Storyboard After It Starts Using Its Interactive Methods
Animation Overview
Storyboards Overview