public async Task <IActionResult> Edit(int id, [Bind("CategoryId,Description")] Category category)
        {
            if (id != category.CategoryId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    db.Update(category);
                    await db.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!CategoryExists(category.CategoryId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(category));
        }
        public async Task <IActionResult> Edit(int id, [Bind("ProductId,Description,PurchaseDate,Price,Available,CategoryId")] Product product)
        {
            if (id != product.ProductId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    db.Update(product);
                    await db.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!ProductExists(product.ProductId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["CategoryId"] = new SelectList(db.Category, "CategoryId", "Description", product.CategoryId);
            return(View(product));
        }