private void ucPanel1_MouseClick(object sender, MouseEventArgs e)
        {
            int preIndex = contextPlayModel.getPreIndex(contextPlayModel.getCurrIndex(currPlaySong, currPlaySongList), currPlaySongList.Count);

            currPlaySong = currPlaySongList[preIndex];
            label1.Text  = "当前播放歌曲为 " + " " + preIndex + " " + currPlaySong.OriginName;
        }
        public StrategyPatternV2()
        {
            InitializeComponent();
            SongInfo song0 = new SongInfo(Application.StartupPath + "\\music\\虎二 - 一个人决定.mp3");
            SongInfo song1 = new SongInfo(Application.StartupPath + "\\music\\娜美 - 一梦半生.mp3");
            SongInfo song2 = new SongInfo(Application.StartupPath + "\\music\\海来阿木 _ 阿呷拉古 _ 曲比阿且 - 别知己.mp3");
            SongInfo song3 = new SongInfo(Application.StartupPath + "\\music\\陆虎 - 雪落下的声音.mp3");

            currPlaySongList.Add(song0);
            currPlaySongList.Add(song1);
            currPlaySongList.Add(song2);
            currPlaySongList.Add(song3);
            currPlaySong     = song0;
            contextPlayModel = new ContextPlayModel(new ListCycle());
            label1.Text      = "当前播放歌曲为 " + contextPlayModel.getCurrIndex(currPlaySong, currPlaySongList) + " " + currPlaySong.OriginName;
            label2.Text      = "当前播放模式为列表循环";
        }