Overview

I'm currently trying to get attribute routing to work with my api controllers. It doesn't appear to be working, and I'm unsure why. I'm not sure if I'm missing a crucial step, or what the problem could be.

Problem

I'm trying to hit localhost/api/user/custom?test=1 but I get a 404 (I expect this to work)

If I hit localhost/api/customapi?test=1 I successfully get into my method

Why does the first url not work?

Setup

My setup is as follows:

CustomController.cs

[System.Web.Mvc.RoutePrefix("api")] public class CustomApiController : ApiController { [System.Web.Mvc.Route("user/custom")] [System.Web.Http.HttpGet] public async Task<CustomResponse> Get([FromUri] CustomRequest request) { //Work } } 

WebApiConfig.cs

public static class WebApiConfig { public static void Register(HttpConfiguration config) { ...(json serializer settings)... // Web API routes config.MapHttpAttributeRoutes(); config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional } ); } } 

RouteConfig.cs

public static class RouteConfig { public static void Register(RouteCollection routes, bool registerAreas = true) { if(registerAreas) { AreaRegistration.RegisterAllAreas(); } //Ignore Routes ... //Register specific routes routes.MapRoute("HomeUrl", "home", new { controller = "Home", action = "Index" }); . . routes.MapRoute( "Default", //Route name "{controller}/{action}/{id}", //URL with parameters new { controller = "Home", action = "Index", id =UrlParameter.Optional } ); } } 

Global.asax.cs

public class Global : HttpApplication { protected void Application_Start() { ....(app startup stuff)... GlobalConfiguration.Configure(WebApiConfig.Register); BundleConfig.Register(BundleTable.Bundles); ....(more app startup stuff)... RouteConfig.Register(RouteTable.Routes); } }