public void loadComboPeriode() { string sql = "SELECT DATE_FORMAT(Tanggal,'%Y-%M') as Periode FROM notajual GROUP BY DATE_FORMAT(Tanggal,'%Y-%M')"; comboBoxBulan.Items.Clear(); try { //Koneksi.JalankanPerintahDML(sql); MySqlDataReader rd = Koneksi.JalankanPerintahQuery(sql); comboBoxBulan.Items.Add("Semua Tampil"); while (rd.Read()) { comboBoxBulan.Items.Add(rd["Periode"] + ""); } rd.Close(); comboBoxBulan.SelectedIndex = 0; } catch (Exception ex) { MessageBox.Show(ex.Message); } }