<MediaElement Name="audio"/>

         <Button   Name="music" Content="点我有音乐哦">

             <Button.Triggers>

                 <EventTrigger RoutedEvent="Button.Click">

                     <BeginStoryboard>

                         <Storyboard>

                             <MediaTimeline Source="7895.WAV" Storyboard.TargetName="audio" RepeatBehavior="Forever" />

                         </Storyboard>

                     </BeginStoryboard>

                 </EventTrigger>

             </Button.Triggers>

         </Button>