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");
    }
}