public bool Insert_Invoice(InvoiceEntity invoice) { if (dbContext == null) { dbContext = new FoodDeliveryEntities(); } bool isInsert = false; int insert = dbContext.INSERT_INVOICE_TOSQL(invoice.OrderDate, invoice.DeliveryDate, invoice.Sale, invoice.ServiceChange, invoice.ShippingFee, invoice.TotalPrice, invoice.Status, invoice.CustomerName, invoice.CustomerPhone, invoice.AddressDelivery, invoice.CustomerID, invoice.StoreID); if (insert > 0) { isInsert = true; } return(isInsert); }