private static void HandleShippingOptionUpdated(PaymentRequestChangedArgs args, ShoppingCart shoppingCart)
{
string selectedShippingOptionId = args.SelectedShippingOption.Tag;
// If the payment provider app decides to send us nothing, just ignore the result.
if (!string.IsNullOrEmpty(selectedShippingOptionId))
{
ShippingType selectedShippingType;
if (!Enum.TryParse <ShippingType>(selectedShippingOptionId, out selectedShippingType))
{
// A proper merchant app implementation might want to just ignore the bad result and
// send a correction to the payment provider app.
throw new Exception("Unrecognized shipping method id.");
}
shoppingCart.ShippingType = selectedShippingType;
}
}
private static void PaymentRequestChangedEventHandler(
Action abortSubmitFunc,
PaymentRequestChangedArgs args,
ShoppingCart shoppingCart)
{
switch (args.ChangeKind)
{
case PaymentRequestChangeKind.ShippingAddress:
shoppingCart.SetShippingAddress(args.ShippingAddress);
break;
case PaymentRequestChangeKind.ShippingOption:
HandleShippingOptionUpdated(args, shoppingCart);
break;
}
var result = new PaymentRequestChangedResult(
changeAcceptedByMerchant: true,
updatedPaymentDetails: CreatePaymentDetails(shoppingCart));
args.Acknowledge(result);
}