Windows Phone 实用开发技巧（21）：自动循环播放视频

In Windows Phone Mango update, we can use VideoBrush since we could not do that in windows phone 7 . So there is something interesting to do. We can develop more fantasitic apps.  For example, we can play a video as background in our application. We want to play video in a loop also. But here comes the problem. Since there is no MediaTimeline in Silverlight for Windows Phone API. How can we repeat media playback ?

In WPF or Silverlight, we can use following code to repeat media playback.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >

  <StackPanel>



    <!-- The MediaElement control plays the sound. -->

    <MediaElement Name="myMediaElement" >

      <MediaElement.Triggers>

        <EventTrigger RoutedEvent="MediaElement.Loaded">

          <EventTrigger.Actions>

            <BeginStoryboard>

              <Storyboard>



                <!-- The MediaTimeline has a RepeatBehavior="Forever" which makes the media play

                     over and over indefinitely.-->

                <MediaTimeline Source="media\tada.wav" Storyboard.TargetName="myMediaElement"  

                 RepeatBehavior="Forever" />



              </Storyboard>

            </BeginStoryboard>

          </EventTrigger.Actions>

        </EventTrigger>

      </MediaElement.Triggers>

    </MediaElement>



  </StackPanel></Page>

 

 In windows phone , I find simple solution to play video in a loop. Since we can catch Media_End event, we can play again in ended event.

 

Another suggestion : do not play large video in your windows phone app since it will cause a little bit performance damage.

Source code can be found here :  

 

 PS:第一次用英文写技术博客，真D疼，奈何为了学好E文，只好疼下去了，因为我坚信：疼着疼着就不疼了！