Name- and type-safe ASP.NET MVC url creation

SafeMvcUrls.cs

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

namespace MonkeyBusters.Web.Mvc
{
    public static class SafeMvcUrls
    {
        public static RedirectToRouteResult RedirectToActionPermanent<C>(this Controller c, Expression<Func<C, ActionResult>> call)
            where C : IController
        {
            return c.RedirectToAction(call, true);
        }

        public static RedirectToRouteResult RedirectToAction<C>(this Controller c, Expression<Func<C, ActionResult>> call, Boolean permenant = false)
            where C : IController
        {
            var mvcAction = Get<C>(call);

            mvcAction.Parameter.Add("controller", GetControllerName(typeof(C)));
            mvcAction.Parameter.Add("action", mvcAction.Action.Name);

            return new RedirectToRouteResult(mvcAction.Parameter);
        }

        public static String Action<C>(this UrlHelper url, Expression<Func<C, ActionResult>> call)
            where C : IController
        {
            var mvcAction = Get<C>(call);

            return url.Action(mvcAction.Action.Name, GetControllerName(mvcAction.Controller), mvcAction.Parameter);
        }

        public static String Action<C>(this UrlHelper url, Expression<Func<C, ActionResult>> call, String protocol)
            where C : IController
        {
            var mvcAction = Get<C>(call);

            return url.Action(mvcAction.Action.Name, GetControllerName(mvcAction.Controller), mvcAction.Parameter, protocol);
        }

        public static String Action<C>(this UrlHelper url, Expression<Func<C, ActionResult>> call, String protocol, String hostname)
            where C : IController
        {
            var mvcAction = Get<C>(call);

            return url.Action(mvcAction.Action.Name, GetControllerName(mvcAction.Controller), mvcAction.Parameter, protocol, hostname);
        }

        static String GetControllerName(Type controllerType)
        {
            var typeName = controllerType.Name;

            if (typeName.ToLower().EndsWith("controller"))
            {
                return typeName.Substring(0, typeName.Length - "controller".Length);
            }
            else
            {
                return typeName;
            }
        }

        class MvcAction
        {
            public Type Controller { get; set; }
            public MethodInfo Action { get; set; }
            public RouteValueDictionary Parameter { get; set; }
        }


        static MvcAction Get<C>(Expression<Func<C, ActionResult>> x)
            where C : IController
        {
            var root = x.Body as MethodCallExpression;

            if (root == null) throw new ArgumentException("Call expression expected.");

            var method = root.Method;

            var parameters = method.GetParameters();
            var arguments = root.Arguments;

            var routeValues = new RouteValueDictionary();

            for (var i = 0; i < parameters.Length; ++i)
            {
                try
                {
                    routeValues[parameters[i].Name] = Evaluate(arguments[i]);
                }
                catch (Exception ex)
                {
                    throw new Exception(String.Format("Failed to evaluate argument #{0} of an mvc action call while creating a url, look at the inner exceptions.", i), ex);
                }
            }

            return new MvcAction()
            {
                Controller = typeof(C),
                Action = root.Method,
                Parameter = routeValues
            };
        }

        static Object Evaluate(Expression e)
        {
            if (e is ConstantExpression)
            {
                return (e as ConstantExpression).Value;
            }
            else
            {
                return Expression.Lambda(e).Compile().DynamicInvoke();
            }
        }
    }
}

@Mart-Bogdan Just saw your comment almost a year later...

It is a library now, and a nuget package. See my safe-mvc-urls project on GitHub.