public OpResult SaveOrUpdate(Entity.ProductModuleVer obj)
 {
     if (obj.Id == 0)
     {
         obj.ModuleId  = CommonService.GUID;
         obj.CreateDT  = DateTime.Now;
         obj.UpdateDT  = obj.CreateDT;
         obj.UpdateUID = CurrentUser.UID;
         obj.CreateUID = obj.UpdateUID;
         ProductModelVerRepository.Add(obj, false);
     }
     else
     {
         var product = ProductModelVerRepository.Find(o => o.Id == obj.Id);
         product.UpdateUID = CurrentUser.UID;
         product.UpdateDT  = DateTime.Now;
     }
     ProductModelVerRepository.SaveChanges();
     return(OpResult.Success());
 }