c# - Using WebAPI 2.2 inside of an existing ASP.NET MVC 5 project -

i using webapi 2.2, attribute routing, inside of existing mvc 5 project. intend migrate entire website on webapi, take time. got working, concerned may doing wrong.

this post seems suggest should calling globalconfiguration.configure(webapiconfig.register) in global.asax.cs file.

if remove httpconfiguration argument typically provided in webapiconfig.register(), , call globalconfiguration.configure(x => x.maphttpattributeroutes()) within webapiconfig.register() method - webapi endpoints respond desired results.

so end with:

public class mvcapplication : system.web.httpapplication {     protected void application_start()     {         arearegistration.registerallareas();         webapiconfig.register();         filterconfig.registerglobalfilters(globalfilters.filters);         routeconfig.registerroutes(routetable.routes);         bundleconfig.registerbundles(bundletable.bundles);     } }   class webapiconfig {     public static void register()     {         globalconfiguration.configure(x => x.maphttpattributeroutes());     } } 

is there wrong approach?

so turns out there 2 ways fix configuration issue comes when webapi 2.2 added existing project. doing both fixes became clear me when read code.

the following:

public class mvcapplication : system.web.httpapplication {     protected void application_start()     {         arearegistration.registerallareas();         webapiconfig.register();         filterconfig.registerglobalfilters(globalfilters.filters);         routeconfig.registerroutes(routetable.routes);         bundleconfig.registerbundles(bundletable.bundles);     } }   class webapiconfig {     public static void register()     {         globalconfiguration.configure(x => x.maphttpattributeroutes());     } } 

is virtually same doing following:

public class mvcapplication : system.web.httpapplication {     protected void application_start()     {         arearegistration.registerallareas();         //webapiconfig.register();         globalconfiguration.configure(webapiconfig.register);         filterconfig.registerglobalfilters(globalfilters.filters);         routeconfig.registerroutes(routetable.routes);         bundleconfig.registerbundles(bundletable.bundles);     } }  class webapiconfig {     public static void register(httpconfiguration configuration)     {         configuration.maphttpattributeroutes();     } } 

it seems experiencing mental lapse :)

it should have been obvious globalconfiguration.configure(x => x.maphttpattributeroutes()) doing same thing globalconfiguration.configure(webapiconfig.register).

it logically follows these should produce same result. here microsoft code globalconfiguration in system.web.http namespace:

/// <summary> /// provides global <see cref="t:system.web.http.httpconfiguration"/> asp.net applications. /// </summary> public static class globalconfiguration {     private static lazy<httpconfiguration> _configuration = createconfiguration();      ///... code excluded brevity      /// <summary>     /// gets global <see cref="t:system.web.http.httpconfiguration"/>.     /// </summary>     public static httpconfiguration configuration     {         { return _configuration.value; }     }      /// <summary>     /// performs configuration <see cref="globalconfiguration.configuration"/> , ensures     /// initialized.     /// </summary>     /// <param name="configurationcallback">the callback perform configuration.</param>     public static void configure(action<httpconfiguration> configurationcallback)     {         if (configurationcallback == null)         {             throw new argumentnullexception("configurationcallback");         }          configurationcallback.invoke(configuration);         configuration.ensureinitialized();     }      private static lazy<httpconfiguration> createconfiguration()     {         return new lazy<httpconfiguration>(() =>         {             httpconfiguration config = new httpconfiguration(new hostedhttproutecollection(routetable.routes));             servicescontainer services = config.services;             contract.assert(services != null);             services.replace(typeof(iassembliesresolver), new webhostassembliesresolver());             services.replace(typeof(ihttpcontrollertyperesolver), new webhosthttpcontrollertyperesolver());             services.replace(typeof(ihostbufferpolicyselector), new webhostbufferpolicyselector());             services.replace(typeof(iexceptionhandler),                 new webhostexceptionhandler(services.getexceptionhandler()));             return config;         });     }      ///... code excluded brevity }