namespace DualScreenDemo { public partial class PrimaryForm { private void GroupYueYuButton_Click(object sender, EventArgs e) { groupGuoYuButton.BackgroundImage = groupGuoYuNormalBackground; groupTaiYuButton.BackgroundImage = groupTaiYuNormalBackground; groupYueYuButton.BackgroundImage = groupYueYuActiveBackground; groupYingWenButton.BackgroundImage = groupYingWenNormalBackground; groupRiYuButton.BackgroundImage = groupRiYuNormalBackground; groupHanYuButton.BackgroundImage = groupHanYuNormalBackground; yueYuSongs = allSongs.Where(song => song.Category == "粵語" && (song.ArtistACategory == "團" || song.ArtistBCategory == "團")) .OrderByDescending(song => song.Plays) .ToList(); currentPage = 0; currentSongList = yueYuSongs; totalPages = (int)Math.Ceiling((double)yueYuSongs.Count / itemsPerPage); multiPagePanel.currentPageIndex = 0; multiPagePanel.LoadSongs(currentSongList); } } }