Shopping carts

// Gets a product to add to the shopping cart
SKUInfo product = SKUInfoProvider.GetSKUs()
									.WhereEquals("SKUName", "NewProduct")
									.WhereNull("SKUOptionCategoryID")
									.FirstObject;

if (product != null)
{
	// Gets the current shopping cart
	ShoppingCartInfo cart = ECommerceContext.CurrentShoppingCart;

	// Creates the shopping cart in the database if necessary
	ShoppingCartInfoProvider.SetShoppingCartInfo(cart);

	// Prepares a shopping cart item representing 1 unit of the product
	ShoppingCartItemParameters parameters = new ShoppingCartItemParameters(product.SKUID, 1);
	ShoppingCartItemInfo cartItem = cart.SetShoppingCartItem(parameters);

	// Saves the shopping cart item to the shopping cart
	ShoppingCartItemInfoProvider.SetShoppingCartItemInfo(cartItem);

	// Invalidates the shopping cart's calculated values (to trigger recalculation of discounts, shipping, price totals, etc).
	cart.InvalidateCalculations();
}

// Gets the product
SKUInfo product = SKUInfoProvider.GetSKUs()
									.WhereEquals("SKUName", "NewProduct")
									.WhereNull("SKUOptionCategoryID")
									.FirstObject;

if (product != null)
{
	// Prepares the shopping cart item
	ShoppingCartItemInfo item = null;

	// Gets the current shopping cart
	ShoppingCartInfo cart = ECommerceContext.CurrentShoppingCart;

	// Loops through the items in the shopping cart
	foreach (ShoppingCartItemInfo cartItem in cart.CartItems)
	{
		// Gets the first shopping cart item matching the specified product
		if (cartItem.SKUID == product.SKUID)
		{
			item = cartItem;
			break;
		}
	}

	if (item != null)
	{
		// Updates the unit count of the shopping cart item to 3
		ShoppingCartItemInfoProvider.UpdateShoppingCartItemUnits(item, 3);

		// Invalidates the shopping cart's calculated values (to trigger recalculation of discounts, shipping, price totals, etc).
		cart.InvalidateCalculations();
	}
}

// Gets the current shopping cart
ShoppingCartInfo cart = ECommerceContext.CurrentShoppingCart;

// Gets the product
SKUInfo product = SKUInfoProvider.GetSKUs()
									.WhereEquals("SKUName", "NewProduct")
									.WhereNull("SKUOptionCategoryID")
									.FirstObject;

if ((cart != null) && (product != null))
{
	// Gets the first item matching the product in the current shopping cart
	ShoppingCartItemInfo item = ShoppingCartItemInfoProvider.GetShoppingCartItems()
											.WhereEquals("SKUID", product.SKUID)
											.WhereEquals("ShoppingCartID", cart.ShoppingCartID)
											.FirstObject;

	if (item != null)
	{
		// Removes the item from the shopping cart
		cart.RemoveShoppingCartItem(item.CartItemID);

		// Removes the item from the database
		ShoppingCartItemInfoProvider.DeleteShoppingCartItemInfo(item);

		// Invalidates the shopping cart's calculated values (to trigger recalculation of discounts, shipping, price totals, etc).
		cart.InvalidateCalculations();
	}
}