//Xóa loại xn
 public static void DeleteParaName(int pId)
 {
     try
     {
         if (TblParamMapping.FetchByID(pId) != null)
         {
             TblParamMapping.Delete(pId);
         }
     }
     catch (Exception e)
     {
         throw e;
     }
 }
 public static void UpdateParaMaping(TblParamMapping pitems)
 {
     try
     {
         if (TblParamMapping.FetchByID(pitems.Id) != null)
         {
             pitems.IsNew = false;
             pitems.Save();
         }
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }