protected void CheckoutBtn_Click(object sender, ImageClickEventArgs e)
        {
            // Update Shopping Cart
            UpdateShoppingCartDatabase();

            // If cart is not empty, proceed on to checkout page
            AWC.BusinessLayer.ShoppingCart cart = new AWC.BusinessLayer.ShoppingCart();

            // Calculate shopping cart ID
            String cartId = cart.GetShoppingCartId();

            // If the cart isn't empty, navigate to checkout page
            if (cart.GetItemCount(cartId) != 0)
            {
                Response.Redirect("Checkout.aspx");
            }
            else
            {
                MyError.Text = "You can't proceed to the Check Out page with an empty cart.";
            }
        }
        void PopulateShoppingCartList()
        {
            AWC.BusinessLayer.ShoppingCart cart = new AWC.BusinessLayer.ShoppingCart();

            // Obtain current user's shopping cart ID
            String cartId = cart.GetShoppingCartId();

            // If no items, hide details and display message
            if (cart.GetItemCount(cartId) == 0)
            {
                DetailsPanel.Visible = false;
                MyError.Text = "There are currently no items in your shopping cart.";
            }
            else
            {

                // Databind Gridcontrol with Shopping Cart Items
                MyList.DataSource = cart.GetItems(cartId);
                MyList.DataBind();

                //Update Total Price Label
                lblTotal.Text = String.Format("{0:c}", cart.GetTotal(cartId));
            }
        }