WPF语音播放MediaPlayer

         private MediaPlayer player;

         public MainWindow()
         {
             InitializeComponent();
             player = new MediaPlayer();
         }

         private void ButtonOfOpen_Click(object sender, RoutedEventArgs e)
         {
             player.Open(new Uri(@"C:\Users\Ares\Desktop\Sound\TfrAlarm.mp3", UriKind.RelativeOrAbsolute));
             DispatcherTimer timer = new DispatcherTimer();
             timer.Interval = TimeSpan.FromSeconds();
             timer.Tick += timer_Tick;
             timer.Start();
         }

         void timer_Tick(object sender, EventArgs e)
         {
             if (player.Source == null) return;

             labelofTime.Content = String.Format("{0}/{1}", player.Position.ToString(@"mm\:ss"), player.NaturalDuration.TimeSpan.ToString(@"mm\:ss"));
         }

         private void ButtonOfPlay_Click(object sender, RoutedEventArgs e)
         {
             player.Play();
         }

         private void ButtonOfPause_Click(object sender, RoutedEventArgs e)
         {
             player.Pause();
         }

         private void ButtonOfStop_Click(object sender, RoutedEventArgs e)
         {
             player.Stop();
         }