public MainWindowViewModel()
{
InitPlayList();
InitMusicList(PlayLists.First());
Lyric = new List <LyricItemViemModel>();
play = new MusicPlay();
PlayOrder = 0;
MaxTime = 1;
PlayIcon = new BitmapImage(new Uri("/Image/full_play.png", UriKind.Relative));
OrderIcon = new BitmapImage(new Uri("/Image/full_recycle.png", UriKind.Relative));
Volume = play.GetVolume();
play.dt = new System.Windows.Threading.DispatcherTimer();
play.dt.Interval = TimeSpan.FromSeconds(0.1);
play.dt.Tick += Dt_Tick;
OpenFileCommand = new DelegateCommand(OpenMusic);
OpenFolderCommand = new DelegateCommand(OpenFolder);
DeleteMusicCommand = new DelegateCommand(DeleteMusic);
PlayListClickCommand = new DelegateCommand(PlayListClick);
MusicListDoubleClickCommand = new DelegateCommand(MusicListDoubleClick);
LastMusicCommand = new DelegateCommand(LastMusic);
PlayMusicCommand = new DelegateCommand(PlayMusic);
NextMusicCommand = new DelegateCommand(NextMusic);
StopMusicCommand = new DelegateCommand(StopMusic);
PlayOrderCommand = new DelegateCommand(ClickPlayOrder);
TimeControlButtonDown = new DelegateCommand(TimeControlButtonDownExcute);
TimeControlButtonUp = new DelegateCommand <Slider>(TimeControlButtonUpExcute);
VolumeChangedCommand = new DelegateCommand(VolumeChanged);
}