Place order, clear Cart in Nop Commerce 4 - shopping-cart

Question

How can I Place an order from the cart and clear the cart?
I want to do this in my own controller and not by the checkout page.
I try to use this, but it doesn't work
//place order
var processPaymentRequest = HttpContext.Session.Get<ProcessPaymentRequest>("OrderPaymentInfo");
if (processPaymentRequest == null)
{
//Check whether payment workflow is required
if (_orderProcessingService.IsPaymentWorkflowRequired(cart))
return RedirectToRoute("CheckoutPaymentInfo");
processPaymentRequest = new ProcessPaymentRequest();
}
GenerateOrderGuid(processPaymentRequest);
processPaymentRequest.StoreId = _storeContext.CurrentStore.Id;
processPaymentRequest.CustomerId = _workContext.CurrentCustomer.Id;
processPaymentRequest.PaymentMethodSystemName =
_genericAttributeService.GetAttribute<string>(_workContext.CurrentCustomer,
NopCustomerDefaults.SelectedPaymentMethodAttribute,
_storeContext.CurrentStore.Id);
HttpContext.Session.Set<ProcessPaymentRequest>("OrderPaymentInfo",
processPaymentRequest);
var placeOrderResult = _orderProcessingService.PlaceOrder(processPaymentRequest);

Answer 1

You can use PlaceOrder method in IOrderProcessingService to place an order. CheckoutController also uses this method. For using it, you have to create a ProcessPaymentRequest by yourself. here is a sample code for such a task (I use the code placed in the CheckoutController which doing the same job):
var processPaymentRequest = HttpContext.Session.Get<ProcessPaymentRequest>("OrderPaymentInfo");
if (processPaymentRequest == null)
{
//Check whether payment workflow is required
if (_orderProcessingService.IsPaymentWorkflowRequired(cart))
return RedirectToRoute("CheckoutPaymentInfo");
processPaymentRequest = new ProcessPaymentRequest();
}
//prevent 2 orders being placed within an X seconds time frame
if (!IsMinimumOrderPlacementIntervalValid(_workContext.CurrentCustomer))
throw new Exception(_localizationService.GetResource("Checkout.MinOrderPlacementInterval"));
//place order
processPaymentRequest.StoreId = _storeContext.CurrentStore.Id;
processPaymentRequest.CustomerId = _workContext.CurrentCustomer.Id;
processPaymentRequest.PaymentMethodSystemName = _workContext.CurrentCustomer.GetAttribute<string>(
SystemCustomerAttributeNames.SelectedPaymentMethod,
_genericAttributeService, _storeContext.CurrentStore.Id);
//____this is main line of code____
var placeOrderResult = _orderProcessingService.PlaceOrder(processPaymentRequest);
if (placeOrderResult.Success)
{
HttpContext.Session.Set<ProcessPaymentRequest>("OrderPaymentInfo", null);
//do payment process:
var postProcessPaymentRequest = new PostProcessPaymentRequest
{
Order = placeOrderResult.PlacedOrder
};
_paymentService.PostProcessPayment(postProcessPaymentRequest);
if (_webHelper.IsRequestBeingRedirected || _webHelper.IsPostBeingDone)
{
//redirection or POST has been done in PostProcessPayment
return Content("Redirected");
}
return RedirectToRoute("CheckoutCompleted", new { orderId = placeOrderResult.PlacedOrder.Id });
}