public ViewResult Checkout(Favorite favorite, ShippingDetails shippingDetails)
{
if (favorite.Lines.Count() == 0)
{
ModelState.AddModelError("", "Sorry, Your favorite is empty");
}
//验证模型，如果无误
if (ModelState.IsValid)
{
orderProcessor.ProcessOrder(favorite, shippingDetails);
favorite.Clear();
return(View("Completed"));
}
else
{
return(View(shippingDetails));
}
}
