Web API cannot access 404

Recently, you need to add a Web Api to your project that is a. NET Mvc4 project. To add an API, no matter how you encapsulate it, you can simply register the WEBAPI route in the Application_Start method. For example, the following code:

public static class Webapiconfig    {public        static void Register (httpconfiguration config)        {            config. Routes.maphttproute (                name: "Defaultapi",                routetemplate: "Api/{controller}/{id}",                defaults:new {id = Routeparameter.optional}            );        }    }

Calling the above register method in the Application_Start method is equivalent to registering the completion. But the author has completed the above work, access to the API is 404 error, can not find. The solution is not good.

Finally, the registration order of the original route is found to be related. A normal MVC project registers the routing information for normal controller,action: for example, the following code:

public static void RegisterRoutes (RouteCollection routes)        {            routes. Ignoreroute ("{resource}.axd/{*pathinfo}");            Routes. MapRoute (                name: "Default",                URL: "{controller}/{action}/{id}",                defaults:new {controller = "Home", action = "Index", id = urlparameter.optional}            );        

The method is also called in Application_Start.

The key is::: To call the API corresponding to the registered routing method, then call the normal controller's route registration method. Because the author is later added in the project Webapi, so just in the last registered API route, can be inaccessible to. Finally, it is successfully accessed before the normal route is registered!

I don't know if this is a bug in. NET MVC, or that's how it's designed.

Web API cannot access 404