Why am I getting 404 when the route matches? ASP.Net MVC

Question

I have been stuck on this issue for several hours now.

I have a controller called 'DecisionPoint' and I have a breakpoint set on it's 'ApplicationState' action. No matter what I try I keep getting a 404 in the browser. I suspected that my route was not correct so I downloaded a route debugger and it turns our the URLs I am trying match the Controller and the action. So why do I get a 404 and never see the breakpoint hit?

/DecisionPoint/ApplicationState/no/worky --> 404

Controller:

 public ActionResult ApplicationState(string fileName, string stateString)
        {
            string filePath = GetDpFilePath(fileName);
            HtmlDocument htmlDocument = new HtmlDocument();
            htmlDocument.Load(filePath);
            HtmlNode stateScriptNode =
                htmlDocument.DocumentNode.SelectSingleNode("/html/head/script[@id ='applicationState']");
            stateScriptNode.InnerHtml = "var applicationStateJSON =" + stateString;
            htmlDocument.Save(filePath);

            return Json("State Updated");

Route

 routes.MapRoute(
        "DecisionPointState", // Route name
        "DecisionPoint/ApplicationState/{fileName}/{stateString}", // URL with parameters
        new {controller = "DecisionPoint", action = "ApplicationState"} // Parameter defaults
    );


        routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}", // URL with parameters
            new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
        );


        }`
**Update**

I create a whole new controller and it works. This is now what my route table looks like. The state controller correclty routes to SaveState

 public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
           "StateRoute", // Route name
           "State/SaveState/{file}/{state}", // URL with parameters
           new { controller = "State", action = "SaveState", file = UrlParameter.Optional, state = UrlParameter.Optional } // Parameter defaults
       );

        routes.MapRoute(
           "DPStateRoute", // Route name
           "DecisionPoint/ApplicationState/{file}/{state}", // URL with parameters
           new { controller = "DecisionPoint", action = "ApplicationState", file = UrlParameter.Optional, state = UrlParameter.Optional } // Parameter defaults
       );


        routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}", // URL with parameters
            new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
        );
    }

    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();

        RegisterRoutes(RouteTable.Routes);
       // RouteDebug.RouteDebugger.RewriteRoutesForTesting(RouteTable.Routes);

    }
}

So I am stumped..

Answer 1

Dumb, but it got me: Be sure your controller inherits from Controller