Posting an Invoice

To post an invoice you must use the InvoiceAPI’s PostInvoice method.

Below is an example of invoicing an order with order number 55.

// Goal: Invoice an order with order number: 55

// Smart way to get a specific order
var order = new DebtorOrderClient { OrderNumber = 55 };
await crud.Read(order);

// Get all orderlines on the order using a master query
var orderLines = await crud.Query<DebtorOrderLineClient>(order);

// Initialize invoice api
var iapi = new InvoiceAPI(crud);

// Post Invoice                        
var result = await iapi.PostInvoice(
    order,          // The order
    orderLines,     // The order lines of the order
    DateTime.Now,   // The DateTime of the invoice
    0,              // The invoice number. 0 means auto generate invoice number
    false);         // Simulation false. Actually invoice the order

Note that in order to post/create an invoice, you must do it from an order with order lines.

In a scenario where you must import invoices from a CSV file (or similar), you must create orders with order lines first and then invoice them.