Using MvcContrib's strongly typed RedirectToAction with an anchor tag (hashtag)?

Question

I'm using MvcContrib's strongly typed RedirectToAction() to redirect from one controller action to another, while avoiding magic strings in my application flow, like so:

this.RedirectToAction<FooController>(c => c.Bar());

which in turn redirects to

/foo/bar/    

... but now I'd like to be able to redirect to an URL with an anchor/hashtag at the end, and scroll the window to the <a name="yarrr" /> tag, like so:

/foo/bar/#yarrr  

I could put the hashtag in TempData[], write it in a javascript variable and have the window scroll via javascript - but I'd rather follow convention and have the hashtag as the end of my URL.

Any ideas or home made solutions for this? MvcContrib doesn't seem to support it.

Answer 1

I am not aware of the existence of such an ActionLink overload in MvcContrib but writing one would be trivial:

using System;
using System.Linq.Expressions;
using System.Web;
using System.Web.Mvc;
using System.Web.Mvc.Html;
using System.Web.Routing;

public static class HtmlExtensions
{
    public static IHtmlString ActionLink<TController>(
        this HtmlHelper html,
        Expression<Action<TController>> action,
        string linkText,
        object htmlAttributes,
        string fragment
    ) where TController : Controller
    {
        var routeValues = Microsoft.Web.Mvc.Internal.ExpressionHelper
            .GetRouteValuesFromExpression(action);
        return html.RouteLink(
            linkText: linkText,
            routeName: null,
            protocol: null,
            hostName: null,
            fragment: fragment,
            routeValues: routeValues,
            htmlAttributes: new RouteValueDictionary(htmlAttributes)
        );
    }
}

and then in your view:

@(Html.ActionLink<FooController>(c => c.Bar(), "click me", null, "yarrr"))

---

UPDATE:

Apparently I misunderstood your question as you were looking for a RedirectToAction method in the controller, not inside the view. My answer is the same as previously: I am not aware of the existence of such an RedirectToAction overload in MvcContrib but writing one would be trivial:

using System;
using System.Linq.Expressions;
using System.Web.Mvc;

public static class HtmlExtensions
{
    public static RedirectResult RedirectToAction<TController>(
        this Controller controller,
        Expression<Action<TController>> action,
        string fragment
    ) where TController : Controller
    {
        var routeValues = Microsoft.Web.Mvc.Internal.ExpressionHelper
            .GetRouteValuesFromExpression(action);
        var urlHelper = new UrlHelper(controller.ControllerContext.RequestContext);
        return new RedirectResult(
            UrlHelper.GenerateUrl(
                routeName: null,
                actionName: null,
                controllerName: null,
                protocol: null,
                hostName: null,
                fragment: fragment,
                routeValues: routeValues,
                routeCollection: urlHelper.RouteCollection,
                requestContext: controller.ControllerContext.RequestContext,
                includeImplicitMvcValues: true
            )
        );
    }
}

and then inside your controller:

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return this.RedirectToAction<FooController>(c => c.Bar(), "yarrr");
    }
}