public JsonResponse Change(User user)
 {
     if (user == null)
     {
         return new JsonResponse {
                    Result  = "Failed",
                    Message = "Change requires an instance of User"
         }
     }
     ;
     if (!ModelState.IsValid)
     {
         return new JsonResponse {
                    Result  = "Failed",
                    Message = "Model state is invalid. See data.",
                    Error   = ModelState
         }
     }
     ;
     db.Entry(user).State = System.Data.Entity.EntityState.Modified;
     db.SaveChanges();
     return(new JsonResponse {
         Message = "Change successful.",
         Data = user
     });
 }
 public JsonResponse Change(PurchaseRequestLineItem purchaseRequestLineItem)
 {
     if (purchaseRequestLineItem == null)
     {
         return new JsonResponse {
                    Result  = "Failed",
                    Message = "Change requires an instance of PurchaseRequestLineItem"
         }
     }
     ;
     if (!ModelState.IsValid)
     {
         return new JsonResponse {
                    Result  = "Failed",
                    Message = "Model state is invalid. See data.",
                    Error   = ModelState
         }
     }
     ;
     db.Entry(purchaseRequestLineItem).State = System.Data.Entity.EntityState.Modified;
     db.SaveChanges();
     return(new JsonResponse {
         Message = "Change successful.",
         Data = purchaseRequestLineItem
     });
 }
        public async Task <IActionResult> PutUser(int id, User user)
        {
            if (id != user.Id)
            {
                return(BadRequest());
            }

            _context.Entry(user).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!UserExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }