public ActionResult AddItems(long storeId, long[] selectedIds)
        {
            var store = _storeRepository.GetById(storeId);

            foreach (var id in selectedIds)
            {
                var existed = store.StoreItems.Any(s => s.ItemId == id);
                if (!existed)
                {
                    var storeItem = _storeService.AddStoreItem(storeId, id);
                    store.StoreItems.Add(storeItem);
                }
            }
            this._dbContext.SaveChanges();
            return(new NullJsonResult());
        }