private void treeMain_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e) { FunctionController fc = new FunctionController(); string typeOfNode = getTypeOfNode(e.Node); setDetailEditingPanelsInvisible(); if (typeOfNode == "interpret") { String interpretName = e.Node.Text; InterpretDTO iDTO = fc.getInterpretByName(interpretName); löschenToolStripMenuItem.Enabled = true; alsFavoritMarkierenToolStripMenuItem.Enabled = true; pnDetailEditingInterpret.Visible = true; edDetailEditingInterpretName.Text = iDTO.getName(); edDetailEditingInterpretFoundationYear.Text = iDTO.getFoundationYear(); edDetailEditingInterpretLand.Text = iDTO.getLand(); edDetailEditingInterpretNoOfAlbums.Text = fc.getAlbumsByInterpret(iDTO.getName()).Count.ToString(); } else if (typeOfNode == "album") { String albumName = e.Node.Text; AlbumDTO aDTO = fc.getAlbumByName(albumName); List <SongDTO> songs = new List <SongDTO>(); listSongs.Items.Clear(); pnDetailEditingAlbum.Visible = true; edDetailEditingAlbumName.Text = aDTO.getName(); edDetailEditingAlbumInterpret.Text = fc.getInterpretNameById(aDTO.getInterpret()); edDetailEditingAlbumYear.Text = aDTO.getReleaseYear(); edDetailEditingAlbumGenre.Text = fc.getGenreById(aDTO.getGenre()); if (aDTO.getCoverpath() != null && aDTO.getCoverpath() != "") { pictureBox1.Image = Image.FromFile(aDTO.getCoverpath()); pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; } else { pictureBox1.Image = null; } songs = fc.getAllSongsByAlbum(albumName); foreach (SongDTO song in songs) { listSongs.Items.Add(song.getTrackNo() + " - " + song.getName() + " | " + song.getDuration()); } } }