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