public async Task <IActionResult> Edit(int id, [Bind("Id,CustomerId,TotalPrice")] Order order)
        {
            if (id != order.Id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(order);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!OrderExists(order.Id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["CustomerId"] = new SelectList(_context.Customer, "Id", "Name", order.CustomerId);
            return(View(order));
        }
        public async Task <IActionResult> Edit(int id, [Bind("Id,Username,Password")] Manager manager)
        {
            if (id != manager.Id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(manager);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!ManagerExists(manager.Id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(manager));
        }
        public async Task <IActionResult> Edit(int id, [Bind("Id,Name,Description,Price")] Product product)
        {
            if (id != product.Id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(product);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!ProductExists(product.Id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(product));
        }