private void buttonChart_Click( object sender, EventArgs e) { if (Playlists == null || comboBoxPlaylist.SelectedItem == null || comboBoxStream.SelectedItem == null || comboBoxAngle.SelectedItem == null || comboBoxChartType.SelectedItem == null) { return; } TSPlaylistFile playlist = (TSPlaylistFile)comboBoxPlaylist.SelectedItem; TSVideoStream videoStream = (TSVideoStream)comboBoxStream.SelectedItem; int angleIndex = (int)comboBoxAngle.SelectedItem; string chartType = comboBoxChartType.SelectedItem.ToString(); FormChart chart = new FormChart(); chart.Generate( chartType, playlist, videoStream.PID, angleIndex); chart.Show(); }