Ambiguous Controller Names in ASP.NET MVC

Question

I tried implementing Phil's Areas Demo in my project

http://haacked.com/archive/2008/11/04/areas-in-aspnetmvc.aspx.

I appended the Areas/Blog structure in my existing MVC project and I get the following error in my project.

The controller name Home is ambiguous between the following types:

WebMVC.Controllers.HomeController
WebMVC.Areas.Blogs.Controllers.HomeController

this is how my Global.asax looks.

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

    routes.MapAreas("{controller}/{action}/{id}",
        "WebMVC.Areas.Blogs",
        new[] { "Blogs", "Forums" });

    routes.MapRootArea("{controller}/{action}/{id}",
        "WebMVC",
        new { controller = "Home", action = "Index", id = "" });

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

}

protected void Application_Start()
{
    String assemblyName = Assembly.GetExecutingAssembly().CodeBase;
    String path = new Uri(assemblyName).LocalPath;
    Directory.SetCurrentDirectory(Path.GetDirectoryName(path));
    ViewEngines.Engines.Clear();
    ViewEngines.Engines.Add(new AreaViewEngine());
              RegisterRoutes(RouteTable.Routes);
   // RouteDebug.RouteDebugger.RewriteRoutesForTesting(RouteTable.Routes);

}

If I remove the /Areas/Blogs from routes.MapAreas, it looks at the Index of the root.

Robert Harvey · Accepted Answer · 2010-02-08 20:13:29Z

3

In ASP.NET MVC 2.0, you can include the namespace(s) for your parent project controllers when registering routes in the parent area.

routes.MapRoute(
    "Default",                                             
    "{controller}/{action}/{id}",                          
    new { controller = "Home", action = "Index", id = "" },
    new string[] { "MyProjectName.Controllers" }
);

This restricts the route to searching for controllers only in the namespace you specified.

edited Feb 8, 2010 at 20:13

answered Feb 8, 2010 at 18:33

Robert Harvey

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Comments

Craig Stuntz · Accepted Answer · 2009-01-16 22:03:51Z

1

Instead of WebMVC.Areas.Blogs and WebMVC, use WebMVC.Areas.Blogs and WebMVC.Areas.OtherAreaName. Think of the area name as the namespace root, not an absolute namespace.

answered Jan 16, 2009 at 22:03

Craig Stuntz

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2 Comments

midas06 Over a year ago

I'm not sure I like that solution. The way the projects are desinged, the main controllers/views folder are clearly their own "Area", they just don't have an assigned name. I'd like for that to continue to function as is.

Craig Stuntz Over a year ago

You can do this if you configure your route to use "main" as the default area.

johnnyRose · Accepted Answer · 2016-03-16 21:29:52Z

0

You can prioritize between multiple controllers with the same name in routing as follows

E.g., I have one controller named HomeController in Areas/Admin/HomeController and another in root /controller/HomeController
so I prioritize my root one as follows:

routes.MapRoute(
    "Default", // Route name
    "{controller}/{action}/{id}", // URL with parameters
    new { controller = "Home", action = "Index", // Parameter defaults
    id = UrlParameter.Optional },
    new [] { "MyAppName.Controllers" } // Prioritized namespace which tells the current asp.net mvc pipeline to route for root controller not in areas.
);

edited Mar 16, 2016 at 21:29

johnnyRose

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answered Mar 17, 2011 at 13:48

Vishal Patwardhan

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