public ActionResult Edit(InvoiceModels model) { if (ModelState.IsValid) { InvoiceAdapter invoiceAdapter = new InvoiceAdapter(); Invoice invoice = new Invoice(); invoice.InvoiceId = model.InvoiceId; invoice.CustomerId = model.CustomerId; invoice.Total = model.Total; invoice.InvoiceDate = model.InvoiceDate; bool returnValue = invoiceAdapter.UpdateInvoice(invoice); if (returnValue) { return(RedirectToAction("Index")); } else { return(View(model)); } } return(View(model)); }