public JsonResult AddToCart(CartDTO cartItem)
        {
            var exMessage = string.Empty;

            try
            {
                cartItem.cartCode = Helpers.GetCartId();

                if (repo.AddToCart(cartItem))
                {
                    return(Json(new { error = false }));
                }
            }
            catch (Exception ex)
            {
                exMessage = ex.Message;
            }

            return(Json(new { error = true, message = exMessage }));
        }