更新：2007 年 11 月
本示例演示如何使用代码在 Storyboard 启动后对其进行控制。若要通过 XAML 控制演示图板，请使用 Trigger 和 TriggerAction 对象；有关示例，请参见如何：在演示图板启动之后使用事件触发器来控制演示图板。
若要启动演示图板，应使用它的 Begin 方法，此方法将演示图板的动画分发给要进行动画处理的属性，然后启动演示图板。
若要使演示图板可控制，应使用 Begin 方法并指定 true 作为第二个参数。然后可以使用演示图板的交互式方法来暂停、继续、搜寻、停止、加速或减慢演示图板，或者使它前进到填充期。下面列出了演示图板的交互式方法：
Pause：暂停演示图板。
Resume：继续暂停的演示图板。
SetSpeedRatio：设置演示图板的交互速度。
Seek：搜寻到指定的演示图板位置。
SeekAlignedToLastTick：搜寻到指定的演示图板位置。与 Seek 方法不同，此操作是在下一计时周期之前处理的。
SkipToFill：使演示图板前进到其填充期（如果有填充期）。
Stop：停止演示图板。
在下面的示例中，使用了几个演示图板方法来以交互方式控制演示图板。
**注意：**若要查看通过 XAML 使用触发器控制演示图板的示例，请参见如何：在演示图板启动之后使用事件触发器来控制演示图板。
示例
/*
This example shows how to control
a storyboard after it has started.
*/
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
namespace Microsoft.Samples.Animation.TimingBehaviors
{
public partial class ControlStoryboardExample : Page
{
private Storyboard myStoryboard;
public ControlStoryboardExample()
{
// Create a name scope for the page.
NameScope.SetNameScope(this, new NameScope());
this.WindowTitle = "Controlling a Storyboard";
this.Background = Brushes.White;
StackPanel myStackPanel = new StackPanel();
myStackPanel.Margin = new Thickness(20);
// Create a rectangle.
Rectangle myRectangle = new Rectangle();
myRectangle.Width = 100;
myRectangle.Height = 20;
myRectangle.Margin = new Thickness(12,0,0,5);
myRectangle.Fill = new SolidColorBrush(Color.FromArgb(170, 51, 51, 255));
myRectangle.HorizontalAlignment = HorizontalAlignment.Left;
myStackPanel.Children.Add(myRectangle);
// Assign the rectangle a name by
// registering it with the page, so that
// it can be targeted by storyboard
// animations.
this.RegisterName("myRectangle", myRectangle);
//
// Create an animation and a storyboard to animate the
// rectangle.
//
DoubleAnimation myDoubleAnimation =
new DoubleAnimation(100, 500, new Duration(TimeSpan.FromSeconds(5)));
Storyboard.SetTargetName(myDoubleAnimation, "myRectangle");
Storyboard.SetTargetProperty(myDoubleAnimation, new PropertyPath(Rectangle.WidthProperty));
myStoryboard = new Storyboard();
myStoryboard.Children.Add(myDoubleAnimation);
//
// Create some buttons to control the storyboard
// and a panel to contain them.
//
StackPanel buttonPanel = new StackPanel();
buttonPanel.Orientation = Orientation.Horizontal;
Button beginButton = new Button();
beginButton.Content = "Begin";
beginButton.Click += new RoutedEventHandler(beginButton_Clicked);
buttonPanel.Children.Add(beginButton);
Button pauseButton = new Button();
pauseButton.Content = "Pause";
pauseButton.Click +=new RoutedEventHandler(pauseButton_Clicked);
buttonPanel.Children.Add(pauseButton);
Button resumeButton = new Button();
resumeButton.Content = "Resume";
resumeButton.Click +=new RoutedEventHandler(resumeButton_Clicked);
buttonPanel.Children.Add(resumeButton);
Button skipToFillButton = new Button();
skipToFillButton.Content = "Skip to Fill";
skipToFillButton.Click +=new RoutedEventHandler(skipToFillButton_Clicked);
buttonPanel.Children.Add(skipToFillButton);
Button setSpeedRatioButton = new Button();
setSpeedRatioButton.Content = "Triple Speed";
setSpeedRatioButton.Click +=new RoutedEventHandler(setSpeedRatioButton_Clicked);
buttonPanel.Children.Add(setSpeedRatioButton);
Button stopButton = new Button();
stopButton.Content = "Stop";
stopButton.Click +=new RoutedEventHandler(stopButton_Clicked);
buttonPanel.Children.Add(stopButton);
myStackPanel.Children.Add(buttonPanel);
this.Content = myStackPanel;
}
// Begins the storyboard.
private void beginButton_Clicked(object sender, RoutedEventArgs args)
{
// Specifying "true" as the second Begin parameter
// makes this storyboard controllable.
myStoryboard.Begin(this, true);
}
// Pauses the storyboard.
private void pauseButton_Clicked(object sender, RoutedEventArgs args)
{
myStoryboard.Pause(this);
}
// Resumes the storyboard.
private void resumeButton_Clicked(object sender, RoutedEventArgs args)
{
myStoryboard.Resume(this);
}
// Advances the storyboard to its fill period.
private void skipToFillButton_Clicked(object sender, RoutedEventArgs args)
{
myStoryboard.SkipToFill(this);
}
// Updates the storyboard's speed.
private void setSpeedRatioButton_Clicked(object sender, RoutedEventArgs args)
{
// Makes the storyboard progress three times as fast as normal.
myStoryboard.SetSpeedRatio(this, 3);
}
// Stops the storyboard.
private void stopButton_Clicked(object sender, RoutedEventArgs args)
{
myStoryboard.Stop(this);
}
}
}