如何：使用用户事件来触发媒体播放功能

更新：2007 年 11 月

此示例演示如何使媒体播放与事件同步。

示例

下面的示例使用 MediaElement 控件和 MediaTimeline 类播放用户单击 Button 时发出的声音。

<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml" >
  <StackPanel>

    <!-- The MediaElement control plays the sound. -->
    <MediaElement Name="myMediaElement" />

    <Button>Click to Hear a Sound!
      <Button.Triggers>
        <EventTrigger RoutedEvent="Button.Click">
          <EventTrigger.Actions>
            <BeginStoryboard>
              <Storyboard>

                <!-- Sound wave from this source is played when the button is clicked.-->
                <MediaTimeline Source="C:\WINDOWS\Media\ringin.wav" Storyboard.TargetName="myMediaElement"  />

              </Storyboard>
            </BeginStoryboard>
          </EventTrigger.Actions>
        </EventTrigger>
      </Button.Triggers>
    </Button>

  </StackPanel>
</Page>

<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml" >
  <StackPanel>

    <!-- The MediaElement control plays the sound. -->
    <MediaElement Name="myMediaElement" />

    <Button>Click to Hear a Sound!
      <Button.Triggers>
        <EventTrigger RoutedEvent="Button.Click">
          <EventTrigger.Actions>
            <BeginStoryboard>
              <Storyboard>

                <!-- Sound wave from this source is played when the button is clicked.-->
                <MediaTimeline Source="C:\WINDOWS\Media\ringin.wav" Storyboard.TargetName="myMediaElement"  />

              </Storyboard>
            </BeginStoryboard>
          </EventTrigger.Actions>
        </EventTrigger>
      </Button.Triggers>
    </Button>

  </StackPanel>
</Page>

有关完整示例，请参见 媒体库。

请参见

任务

媒体库

概念

WPF 图形、动画和媒体概述

参考

MediaElement

MediaTimeline

RoutedEvent

Storyboard

其他资源

音频和视频帮助主题