public int check_refuse(apply applyDemo, teacher teacherDemo, string refuse) { MySqlConnection conn = CP.getConnection(); DateTime DT = DateTime.Now; string sql; if (teacherDemo.getTeacher_pos() == 1) { sql = $"update tb_apply set check_tutor=2,apply_editTime='{DT}',apply_refuse='{refuse}' where apply_ID={applyDemo.getApply_ID()}"; } else { sql = $"update tb_apply set check_instructor=2,apply_editTime='{DT}',apply_refuse='{refuse}' where apply_ID={applyDemo.getApply_ID()}"; } MySqlCommand cmd = new MySqlCommand(sql, conn); int j = cmd.ExecuteNonQuery(); CP.closeConnection(conn); return(j); }