Generate URL in HTML helper

Question

You can create url helper like this inside html helper extension method:

var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
var url = urlHelper.Action("Home", "Index")

You can also get links using UrlHelper public and static class:

UrlHelper.GenerateUrl(null, actionName, controllerName, null, null, null, routeValues, htmlHelper.RouteCollection, htmlHelper.ViewContext.RequestContext, true)

In this example you don't have to create new UrlHelper class what could be a little advantage.

Here is my tiny extenstion method for getting UrlHelper of a HtmlHelper instance :

  public static partial class UrlHelperExtensions
    {
        /// <summary>
        /// Gets UrlHelper for the HtmlHelper.
        /// </summary>
        /// <param name="htmlHelper">The HTML helper.</param>
        /// <returns></returns>
        public static UrlHelper UrlHelper(this HtmlHelper htmlHelper)
        {
            if (htmlHelper.ViewContext.Controller is Controller)
                return ((Controller)htmlHelper.ViewContext.Controller).Url;

            const string itemKey = "HtmlHelper_UrlHelper";

            if (htmlHelper.ViewContext.HttpContext.Items[itemKey] == null)
                htmlHelper.ViewContext.HttpContext.Items[itemKey] = new UrlHelper(htmlHelper.ViewContext.RequestContext, htmlHelper.RouteCollection);

            return (UrlHelper)htmlHelper.ViewContext.HttpContext.Items[itemKey];
        }
    }

Use it as:

public static MvcHtmlString RenderManagePrintLink(this HtmlHelper helper, )
{    
    var url = htmlHelper.UrlHelper().RouteUrl('routeName');
    //...
}

(I'm posting this ans for reference only)