/// <summary>
/// 上一曲
/// </summary>
//private void SkipToPrevious()
//{
// try
// {
// smtc.PlaybackStatus = MediaPlaybackStatus.Changing;
// currentIndex--;
// playbackList.MovePrevious();
// }
// catch
// {
// }
//}
private void SkipToPrevious()
{
try
{
var index = (currentIndex - 1 + playlist.Count) % playlist.Count;
PlayIndex(index);
CurrentPlayItemChanged?.Invoke(playlist, new CurrentMediaPlayItemChangedEventArgs()
{
NewItem = playlist[index]
});
}
catch (Exception)
{
throw;
}
}
private void PlayIndex(int index)
{
if (index >= 0 && index <= playlist.Count)
{
smtc.PlaybackStatus = MediaPlaybackStatus.Changing;
SetPlayItemSource(playlist[index]);
BackgroundMediaPlayer.Current.Play();
smtc.PlaybackStatus = MediaPlaybackStatus.Playing;
if (currentIndex != index)
{
currentIndex = index;
CurrentPlayItemChanged?.Invoke(playlist, new CurrentMediaPlayItemChangedEventArgs()
{
NewItem = playlist[index]
});
}
}
else
{
Debug.WriteLine("The song index is out of range");
}
}
