C# and Google Checkout - getting the reply back from the server?

Question

Are there any tutorials out there on how to get the responses back from a Google Checkout transaction when using C# and the GCheckout API. All of the examples I could find w

Answer 1

Without a HTTPS connection you'll only get a serial number POSTed to you. For safety, you should ensure that the authorisation is correct (there should be an Authorization header containing : encoded using base64 encoding)

You then need to make a call via the Notification-History-API to request details of the update, loosely:

IList ordersToGetUpdate = new List { serialNumber };

NotificationHistoryRequest request = new NotificationHistoryRequest(ordersToGetUpdate);
NotificationHistoryResponse resp = (NotificationHistoryResponse)request.Send();

foreach (object notification in resp.NotificationResponses)
{
    // You'd now need to handle the response, which could be one of NewOrderNotification, OrderStateChangeNotification, RiskInformationNotification, AuthorizationAmountNotification or a ChargeAmountNotification
    NewOrderNotification newOrder = notification as NewOrderNotification;
    if( newOrder != null )
    {
        // Yay! New order, so do "something" with it
    }

    OrderStateChangeNotification orderUpdate = notification as OrderStateChangeNotification;
    if (orderUpdate != null)
    {
         // Order updated (paid, shipped, etc), so do "something" with it
    }

    // you probably get the idea as to how to handle the other response types
}