Web API MapHttpRoutes broken after upgrade from RC to Release of MVC 4 RSS

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  kylelibb

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  Web API MapHttpRoutes broken after upgrade from RC to Release of MVC 4

  Aug 22, 2012 05:00 PM|LINK

  My client is 2 months into developing an application using the RC version of MVC 4 and Web API. We recenly added a new developer to the team and set him up with the RTM version to see how we would fair. Right out of the gate we're getting exceptions when registering our Web Api routes.

  We're using Areas, so here's the route mapping code for our area registration:

  public override void RegisterArea(AreaRegistrationContext context)
  {
      //Register Web API route
      context.Routes.MapHttpRoute(
                         name: "foo_defaultapi",
                         routeTemplate: "foo/api/{controller}/{id}",
                         defaults: new { id = RouteParameter.Optional });
  
      //Register MVC route
      context.MapRoute(
                 "foo_default",
                 "foo/{controller}/{action}/{id}",
                 new { controller = "Home", action = "Index", id = UrlParameter.Optional });
  }

  Here's the exception we're seeing:

  Method 'GetVirtualPath' in type 'System.Web.Http.WebHost.Routing.HostedHttpRoute' from assembly 'System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation.

  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
  
  Exception Details: System.TypeLoadException: Method 'GetVirtualPath' in type 'System.Web.Http.WebHost.Routing.HostedHttpRoute' from assembly 'System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation.

  Source Error:

  Line 38:         public   override void RegisterArea(AreaRegistrationContext context)
  Line 39:         {
  Line 40:               context.Routes.MapHttpRoute(
  Line 41:                           name:   "foo_DefaultApi",
  Line 42:                           routeTemplate: "foo/api/{controller}/{id}",

  
  Source File: C:\workspaces\Release\MyApp\Areas\Foo\FooAreaRegistration.cs    Line: 40
  
  Stack Trace:

  [TypeLoadException: Method 'GetVirtualPath' in type   'System.Web.Http.WebHost.Routing.HostedHttpRoute' from assembly 'System.Web.Http.WebHost,   Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not   have an implementation.]
       System.Web.Http.RouteCollectionExtensions.MapHttpRoute(RouteCollection   routes, String name, String routeTemplate, Object defaults, Object constraints,   HttpMessageHandler handler) +0
       System.Web.Http.RouteCollectionExtensions.MapHttpRoute(RouteCollection   routes, String name, String routeTemplate, Object defaults) +69
       MyApp.Areas.Foo.FooAreaRegistration.RegisterArea(AreaRegistrationContext   context) in   C:\workspaces\Release\MyApp\Areas\Foo\FooAreaRegistration.cs:40
       System.Web.Mvc.AreaRegistration.CreateContextAndRegister(RouteCollection   routes, Object state) +105
     System.Web.Mvc.AreaRegistration.RegisterAllAreas(RouteCollection   routes, IBuildManager buildManager, Object state) +199
       System.Web.Mvc.AreaRegistration.RegisterAllAreas(Object state) +45
     System.Web.Mvc.AreaRegistration.RegisterAllAreas()   +6
     VRC.MRPa.MrpaApplication.Application_Start() in   c:\workspaces\Release\MyApp\Global.asax.cs:42
   

  • Edited by kylelibb on Aug 22, 2012 05:11 PM
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  DarrellNorto...

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  Re: Web API MapHttpRoutes broken after upgrade from RC to Release of MVC 4

  Aug 22, 2012 05:39 PM|LINK

  You've got the older version still installed in the GAC. Use this command to uninstall it:

  gacutil /uf System.Web.Http

  
  
  

  Darrell Norton, MVP
  Darrell Norton's Blog
  Please click "Mark as Answer" if this helped you.
  • Edited by DarrellNorton on Aug 22, 2012 05:40 PM
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  kylelibb

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  3 Posts

  Re: Web API MapHttpRoutes broken after upgrade from RC to Release of MVC 4

  Aug 22, 2012 06:48 PM|LINK

  Turns out we were missing some key components of the release version of MVC 4. Had nothing to do with the MVC 4 upgrade from RC to Release.

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  kylelibb

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  3 Posts

  Re: Web API MapHttpRoutes broken after upgrade from RC to Release of MVC 4

  Aug 22, 2012 06:50 PM|LINK

  Yes, thanks, issues with the previous version hanging around was the inital problem. Though it wasn't in the GAC as far as I could see. Regardless, we can around that and then had to  upgrade Json.Net (Newtonsoft.Json) to get past the next issue.

  • Edited by kylelibb on Aug 22, 2012 06:51 PM
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  MyScreenName...

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  Re: Web API MapHttpRoutes broken after upgrade from RC to Release of MVC 4

  Aug 30, 2012 05:51 PM|LINK

  I have exactly this issue. I've installed VS2012, opened an existing 2010 solution with 2 ASP.NET MVC 4 RC projects and added a new ASP.NET MVC 4 project.

  The new project references ASP.NET 4 installation folder in Program Files(x86) and the MapHttpRoute method is not found.

  If I make a new solution and MVC 4 project, it does the same.

  Existing projects using the Nuget package are fine. Removing and re-adding MVC 4 Nuget package is fine.

  http://lukepuplett.com
  • Edited by myscreennamewastaken on Aug 30, 2012 05:56 PM
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  MyScreenName...

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  Re: Web API MapHttpRoutes broken after upgrade from RC to Release of MVC 4

  Aug 30, 2012 06:05 PM|LINK

  Okay this was down to the default RouteConfig.cs in the new project not having

  using System.Web.Http;

  At the top.

  http://lukepuplett.com