public ActionResult AddSupplier(Supplier supplier)
        {
            SupplierDAO suppDAO = new SupplierDAO();

            bool saved = false;
            //string duplicateMsg = "supplier ID already exist";

            Supplier existingSupp = suppDAO.FindSupplierById(supplier.Id);

            if (supplier.Id == existingSupp.Id)
            {
                SetFlash(Enums.FlashMessageType.Error, "Supplier information for supplier name: " + supplier.Name + " was not added due to duplicate Supplier ID: " + supplier.Id + ".");
                return(RedirectToAction("Suppliers"));
            }
            else if (supplier.Id != existingSupp.Id)
            {
                saved = suppDAO.AddSupplier(supplier);
                if (saved)
                {
                    SetFlash(Enums.FlashMessageType.Success, "Supplier record for Supplier ID: " + supplier.Id + " successfully added!");
                    return(RedirectToAction("Suppliers"));
                }

                SetFlash(Enums.FlashMessageType.Error, "Failed to add supplier record for Supplier ID: " + supplier.Id + ".");
                return(RedirectToAction("Suppliers"));
            }
            else
            {
                SetFlash(Enums.FlashMessageType.Error, "Supplier record for Supplier ID: " + supplier.Id + " not saved.");
                return(RedirectToAction("Suppliers"));
            }
        }