// GET: Cart
public ActionResult ViewCart(int Id, string sessionId, int?productId, int?quantity)
{
//send to view
ViewData["sessionId"] = sessionId;
ViewData["Id"] = Id;
//second view cart (after user edit cart) there is a productId
if (productId != null)
{
UpdateQuantityPerProductId(sessionId, (int)productId, (int)quantity);
}
//Retreieve OrderSummary and CartProducts and send to view
List <Order> OrderSummary = (List <Order>)Session[sessionId + "_Orders"];
List <Order> cartProducts = ProductsData.GetProductsByProductId(OrderSummary);
ViewData["cartProducts"] = cartProducts;
ViewData["OrderSummary"] = OrderSummary;
//to calculate total price
RefreshPrice(cartProducts);
return(View());
}