public async Task <IActionResult> PostListProductPromotion([FromBody] ListProductPromotion listProductPromotion)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            var getCode = await _context.GetTransactionInv
                          .Where(w => w.GoodId == listProductPromotion.GoodId)
                          .GroupBy(g => new { g.GoodCode })
                          .Select(s => new { s.Key.GoodCode })
                          .ToListAsync();

            var getSubCodePro = await _context.CodePromotion
                                .Where(w => w.SubId == listProductPromotion.SubId)
                                .GroupBy(g => new { g.SubCodePro })
                                .Select(s => new { s.Key.SubCodePro })
                                .ToListAsync();

            listProductPromotion.GoodCode   = getCode[0].GoodCode;
            listProductPromotion.SubCodePro = getSubCodePro[0].SubCodePro;

            _context.ListProductPromotion.Add(listProductPromotion);
            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateException)
            {
                if (ListProductPromotionExists(listProductPromotion.GoodId))
                {
                    return(new StatusCodeResult(StatusCodes.Status409Conflict));
                }
                else
                {
                    throw;
                }
            }

            return(CreatedAtAction("GetListProductPromotion", new { id = listProductPromotion.GoodId }, listProductPromotion));
        }
        public async Task <IActionResult> PutListProductPromotion([FromRoute] int id, [FromBody] ListProductPromotion listProductPromotion)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (id != listProductPromotion.Id)
            {
                return(BadRequest());
            }

            var getCode = await _context.GetTransactionInv
                          .Where(w => w.GoodId == listProductPromotion.GoodId)
                          .GroupBy(g => new { g.GoodCode })
                          .Select(s => new { s.Key.GoodCode })
                          .ToListAsync();

            var getSubCodePro = await _context.CodePromotion
                                .Where(w => w.SubId == listProductPromotion.SubId)
                                .GroupBy(g => new { g.SubCodePro })
                                .Select(s => new { s.Key.SubCodePro })
                                .ToListAsync();

            listProductPromotion.GoodCode   = getCode[0].GoodCode;
            listProductPromotion.SubCodePro = getSubCodePro[0].SubCodePro;

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

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

            return(NoContent());
        }