How to Add Product to The Basket in Commerce Server 2009

//Add the basket query request
shoppingController.AddBasketQueryRequest(ShoppingController.DefaultBasketName);
//Execute the basket query request
shoppingController.ExecuteBrokerRequests();

Microsoft.Commerce.Portal.Common.Basket commonBasket =
shoppingController.GetBasket(ShoppingController.DefaultBasketName);

basket = CommerceContext.Current.OrderSystem.GetBasket(new Guid(commonBasket.UserId), "default");

Step 2: Get the OrderForm:

OrderForm: Order form is a container that holds products. Order form represents collection of line items. This class is available in Microsoft.CommerceServer.Runtime.Orders namespace.

We will get the OrderForm from the basket instance as follows

OrderForm orderForm = basket.OrderForms[0];

There might be case that there is no order form available for the basket. In this case we can create new order form as follows:

OrderForm orderForm;
if (basket.OrderForms.Count == 0)
{
orderForm = new OrderForm();
basket.OrderForms.Add(orderForm);
}

Step 3: Add the line items to the order form:

For Line Items, LineItem class is available. LineItem represent single line item on an order form. LineItem class is available in Microsoft.CommerceServer.Runtime.Orders namespace.

To add line items to the order form we need to create line item instance as follows:

LineItem lineItem = new LineItem();
lineItem.ProductCatalog ="Adventure Works catalog";
lineItem.ProductId = "AW074-04";
//Default quantity
lineItem.Quantity = 1;
lineItem.DisplayName = Dunes;
//Default ListPrice
lineItem.ListPrice = 98,00;

//Add the product (LineItem) to an order form
orderForm.LineItems.Add(lineItem);

Step 4: Save the basket:

basket.Save();