C# (CSharp) Musics.Count示例

        public Model.Music Next()
        {
            if (Musics.Count() == 0)
            {
                return(null);
            }

            ++_CurrentIndex;
            _CurrentIndex %= Musics.Count();

            return(Musics[_CurrentIndex]);
        }

示例#2

显示文件

文件： MusicViewModel.cs 项目： navidemad/cpp-windows-media-player

        public Model.Music Prev()
        {
            if (Musics.Count() == 0)
            {
                return(null);
            }

            if (_CurrentIndex > 0)
            {
                --_CurrentIndex;
            }
            else
            {
                _CurrentIndex = Musics.Count() - 1;
            }

            return(Musics[_CurrentIndex]);
        }