private List <ShoppingItem> UpdateCartItems()
{
var cart = new ProductCart();
string cartGuid = cart.GetCartGuid();
ProductCart.ShoppingCartUpdates[] cartUpdates = new ProductCart.ShoppingCartUpdates[CartList.Rows.Count];
for (int i = 0; i < CartList.Rows.Count; i++)
{
var rowValue = GetValues(CartList.Rows[i]);
cartUpdates[i].ProductId = int.Parse(rowValue["ProductId"].ToString());
var cbRemove = (CheckBox)CartList.Rows[i].FindControl("Remove");
cartUpdates[i].RemoveItem = cbRemove.Checked;
var quantityTextBox = (TextBox)CartList.Rows[i].FindControl("PurchaseQuantity");
cartUpdates[i].PurchaseQuantity = int.Parse(quantityTextBox.Text);
}
cart.UpdateShoppingCart(cartGuid, cartUpdates);
CartList.DataBind();
lblTotal.Text = $"{cart.GetTotal():c}";
return(cart.GetCartItems());
}