I am trying to make a shopping cart that updates using Ajax

And I am thinking that I should have a partial view with the shopping cart and then reload this partial view using Ajax to update the content of the cart. This seems like an elegant solution to the problem.

Is this the right approach, or is it better to do something else?

And if it is, can someone point me to an example of this? I am getting errors when calling f.x.:

        $.ajax({
            url: '@Url.Action("ShopCart")',
            type: 'GET',
            cache: false,
            success: function (data) {
                alert(data);
            }
        });

Which is giving me "There is not current PublishedContentRequest, it must be initialized before the RenderRouteHandler executes". It gives the URL: /umbraco/RenderMvc/ShopCart

And different error when using different URLs. What is the correct url to use to get the partial view? It is located i n /Views/Partials/ShopCart.cshtml . Do I need other changes, like urlRewriting or creating a different controller?

If I use the URL "/Views/Partials/ShopCart" I get the error: "Cannot configure the request if there is not content assigned"

Any pointers are welcome - thanks :)