public void pilihtipe() { Data.Reservation dr = new Data.Reservation(); koneksi kon = new koneksi(); kon.openConnection(); string query = "select price_room from tb_room where type_room = '" + cbxroomtypereserv.Text + "'"; MySqlDataReader dre = kon.DataReader1(query); dre.Read(); tbxroompricereserv.Text = dre["price_room"].ToString(); kon.closeConnection(); }