public async Task <IActionResult> PutPurchaseHeaders(int id, PurchaseHeaders purchaseHeaders)
        {
            if (id != purchaseHeaders.ID)
            {
                return(BadRequest());
            }

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

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

            return(NoContent());
        }
        public async Task <ActionResult <PurchaseHeaders> > PostPurchaseHeaders(PurchaseHeaders purchaseHeaders)
        {
            _context.Purchase_Headers.Add(purchaseHeaders);
            await _context.SaveChangesAsync();

            return(CreatedAtAction("GetPurchaseHeaders", new { id = purchaseHeaders.ID }, purchaseHeaders));
        }
        public async Task <ActionResult <PurchaseHeaders> > PostPurchaseHeaders(PurchaseHeaders purchase_Headers, string article_Doc, string bill_Doc)
        {
            var purchaseHeader = _context.Purchase_Headers.Where(g => g.Article_Doc == article_Doc).Where(g => g.Bill_Doc == bill_Doc).FirstOrDefault();

            if (purchaseHeader == null)
            {
                _context.Purchase_Headers.Add(purchase_Headers);
                await _context.SaveChangesAsync();

                return(CreatedAtAction("GetPurchase_Headers", new { id = purchase_Headers.ID }, purchaseHeader));
            }
            else
            {
                return(Ok("Duplicate"));
            }
        }