/// <summary>
 /// 停止播放
 /// </summary>
 private void StopMusic()
 {
     PlayIcon = new BitmapImage(new Uri("/Image/full_play.png", UriKind.Relative));
     Playing  = new MusicItemViewModel();
     play.dt.Stop();
     play.Stop();
     Position = new TimeSpan();
 }
 /// <summary>
 /// 初始化音乐列表
 /// </summary>
 /// <param name="playList"></param>
 private void InitMusicList(PlayListItemViewModel playList)
 {
     MusicList           = new List <MusicItemViewModel>();
     playList.IsSelected = true;
     foreach (var item in PlayListService.GetMusicList(playList.PlayList))
     {
         MusicItemViewModel viewModel = new MusicItemViewModel();
         viewModel.Music = item;
         MusicList.Add(viewModel);
     }
 }