如何在MVC3中使用MvcPaging2.0使用RouteValues？

public class Paging
{
    public int PageSize { get; set; }
    public int PageNumber { get; set; }
    public int TotalItems { get; set; }
    public string RouteName { get; set; }
    public RouteValueDictionary RouteValues { get; set; }
}

public static class PagingHelpers
{
    public static MvcHtmlString Pager(this HtmlHelper html, Paging paging)
    {
        var builder = new TagBuilder("div");
        builder.AddCssClass("pager");

        int currentPage = paging.PageNumber;
        int totalPages = (int)Math.Ceiling((double)paging.TotalItems / paging.PageSize);

        if (currentPage > 1)
        {
            var routeValues = new RouteValueDictionary(paging.RouteValues);
            routeValues["page"] = currentPage - 1;
            var link = new TagBuilder("a");
            link.MergeAttribute("href", UrlHelper.GenerateUrl(null, paging.RouteName, null, routeValues, RouteTable.Routes, html.ViewContext.RequestContext, true));
            link.InnerHtml = "Previous";
            builder.InnerHtml += link.ToString();
        }

        if (currentPage< totalPages)
        {
            var routeValues = new RouteValueDictionary(paging.RouteValues);
            routeValues["page"] = currentPage + 1;
            var link = new TagBuilder("a");
            link.MergeAttribute("href", UrlHelper.GenerateUrl(null, paging.RouteName, null, routeValues, RouteTable.Routes, html.ViewContext.RequestContext, true));
            link.InnerHtml = "Next";
            builder.InnerHtml += link.ToString();
        }

        return MvcHtmlString.Create(builder.ToString());
    }
}

public ActionResult Index(int page = 1)
{
    var paging = new Paging
    {
        PageSize = 10,
        PageNumber = page,
        TotalItems = 100,
        RouteName = "Index",
        RouteValues = new RouteValueDictionary { { "page", page } }
    };

    return View(paging);
}

@model Paging

@Html.Pager(Model)