public JsonResult Delete(List <string> liId) { var ret = 0; if (liId != null) { var bus = new COURSESTUDIED_BUS(); foreach (var id in liId) { var item = bus.GetByID(new COURSESTUDIED_OBJ.BusinessObjectID(id)); if (item == null) { ret = -2; continue; } if (item.UNIVERSITYCODE != ses.gUNIVERSITYCODE) { ret = -4; } if (ret >= 0) { ret = bus.delete(item._ID); } } bus.CloseConnection(); } return(Json(new { ret = ret }, JsonRequestBehavior.AllowGet)); }