I have a project that I am upgrading from MVC 2 -> MVC 4. During the transition from MVC 2 -> MVC 3, I noticed that some of my hyperlinks broke and were no longer matching the routes as defined before. I have the following project structure:
...
App_Data
Areas
Test
Controllers
TestController
Views
Models
Controllers
PartialController
Views
Scripts
...
The links that are generated are in the format /Test/Partial/Render. If I go back and run the project before the migration, the PartialController Render action is hit as expected. However, now the app says that it can't find an action because there is no Test/Partial controller. I actually am not sure how it worked before, but can't seem to get it to map correctly.
Is there something I'm missing? Here is the relevant code:
Global.asax.cs:
...
AreaRegistration.RegisterAllAreas();
RegisterRoutes(RouteTable.Routes);
...
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = "" }
);
TestAreaRegistration.cs:
context.MapRoute(
"Test_default",
"Test/{controller}/{action}/{id}",
new { action = "Index", id = UrlParameter.Optional }
);
I did move the Controllers folder up a level to be more in-line with how the project should be structured; beforehand it was in the Areas folder itself. However, none of this worked before I moved that, so I doubt that is the case. I also thought that Autofac had something to do with this, but I am less certain of that because if I shave the "Test" portion out of the URL it matches as expected.
I guess this all boils down to a question on how to check in a "generic" controllers directory first, before matching to an area-specific controller directory, even with an area specified in the URL.
Thanks in advance for your help!
EDIT: If it helps, I noticed that in the existing MVC 2 solution, if I go to Test/Home for example, it will invoke the Index method of the HomeController. However, this does not happen in the new solution. Is this because there is no View associated with the new routes? I have not made new .cshtml files for each of the corresponding .ascx files yet, but I didn't think that should matter much as they are used otherwise.
So apparently the issue was related to namespaces. I had seen that answer on questions like this, but those had to do with collisions finding views. Here is the line I ended up adding to each of my Area registrations:
context.MapRoute(
"Test_default",
"Test/{controller}/{action}/{id}",
new { action = "Index", id = UrlParameter.Optional },
new string[] { "Project.Web.Controllers", "Project.Web.Areas.Test.Controllers" } //added this line
);
I have an MVC4 project with language selection:
en
nl
fr
de
1 main part with:
About
Common (for the menu)
Contact
Faq
Home
And 3 areas:
Admin
Customers
Shop
In each area I have at least one controller, for example in Admin I have the controller overview with the corresponding view folder overview which contains an index.aspx page.
The home page and all the main pages (about, faq, etc.) work and can be visited).
However, when I follow the url: localhost:xxxx/en/admin/overview
I get the error:
The controller for path '/en/admin/overview' was not found or does not implement IController.
Even though the route is correct (I can see this with Route Debugger), the error page also shows that the error was thrown when I wanted to load my main menu items:
<nav id="site-navigation" class="eightcol">
#Html.Action("MenuItems", "Common")
</nav>
-- Code removed because irrelevant --
Everything seems to be in order, but MVC doesn't seem to be able to load the menu, which is located in the main part.
So, the root of the problem is:
Can I grant an area (e.g. Admin) access to the controllers in the main part (home, common, about, etc.) of my project?
I've found it.
When a page, that is located inside an area, wants to access a controller that is located outside of this area (such as a shared layout page or a certain page inside a different area), the area of this controller needs to be added.
Since the common controller is not in a specific area but part of the main project, you have to leave area empty:
#Html.Action("MenuItems", "Common", new {area="" })
The above needs to be added to all of the actions and actionlinks since the layout page is shared throughout the various areas.
It's exactly the same problem as here:
ASP.NET MVC Areas with shared layout
Edit: To be clear, this is marked as the answer because it was the answer for my problem. The above answers might solve the causes that trigger the same error.
In my case, the same error was not related to Area but thought to post the error caused in my case, which may be helpful for the people who come to this thread by searching "The controller for path was not found or does not implement IController"
The error was caused because of wrong entry in _Layout.cshtml file.
#Styles.Render("~/Content/misc")
The bundle with that name was removed in BundleConfig.cs but forgot to remove it in _Layout.cshtml
It was silly, but we programmers always do lot of silly mistakes :)
Yet another possible root cause for this error is if the namespace for the area registration class does not match the namespace for the controller.
E.g. correct naming on controller class:
namespace MySystem.Areas.Customers
{
public class CustomersController : Controller
{
...
}
}
With incorrect naming on area registration class:
namespace MySystem.Areas.Shop
{
public class CustomersAreaRegistration : AreaRegistration
{
...
}
}
(Namespace above should be MySystem.Areas.Customers.)
Will I ever learn to stop copy and pasting code? Probably not.
Also, for those who the solution above didn't work, here's is what worked for me:
I have a solution with multiple projects. All projects were in MVC3. I installed Visual Studio 2012 in my machine and it seems that some projects were automatically upgraded to MVC4.
I got this problem
The controller for path '/etc/etc' was not found or does not implement IController
because the project that handled that route was pointing to MVC4.
I had to manually update their references to use MVC3. You can also do that by opening the .csproj file with a text editor. Find the reference to MVC3 and remove this line:
<SpecificVersion>False</SpecificVersion>
This error can also be caused by the fact that Controllers must have (in their name) the word Controller; viz: HomeController; unless you implement your own ControllerFactory.
in my case, the problem was that the controller class has not been publicly announced.
class WorkPlaceController : Controller
the solution was
public class WorkPlaceController : Controller
Here is my problem and the solution that what worked for me.
I added a new controller with a single action returning a string to an existing application. But when I navigated to that controller via browser, I was getting the same error as mentioned above.
After doing lot of googling, I found out that I simply had to modify my Global.asax.cs file for it to recognize the new controller. All I did was added a space to Global.asax.cs file so that it is modified and it worked
In my case namespaces parameter was not matching the namespace of the controller.
public override void RegisterArea(AreaRegistrationContext context)
{
context.MapRoute(
"Admin_default",
"Admin/{controller}/{action}/{id}",
new {controller = "Home", action = "Index", id = UrlParameter.Optional },
namespaces: new[] { "Web.Areas.Admin.Controllers" }
);
}
Not sure if this hits the solution from a different angle to the accepted answer, but I found that one of my controllers in the Areas section was sitting in the wrong namespace. Correcting the namespace to:
Areas.{AreaName}.Controller
fixed the issue for me.
I suspect the key factor was to have all the controllers within a given area share the same namespace.
One other cause of this error: Accidental use of Html.Action in a Layout file where Html.ActionLink may have been intended. If the view referenced by the Html.Action uses the same Layout file you effectively have created an endless loop. (The layout view loads the referenced view as partial view which then loads the layout view which loads the referenced view...) If you set a breakpoint in the Layout file and single step through the Htlm.Action you will sometimes get a more helpful message about excessive stack size.
In my case I had #{ Html.RenderAction("HeaderMenu", "Layout", new { Area = string.Empty }); } in _Layout.cshtml but the LayoutController did not exist! (I had copied _Layout.cshtml from another solution but forgot to copy the controller)
In my case in global.asax/application_start method,
I was registering web api routes AFTER mvc routes like so:
RouteConfig.RegisterRoutes(RouteTable.Routes);
GlobalConfiguration.Configure(WebApiConfig.Register);
Reverting the order fixed the issue
GlobalConfiguration.Configure(WebApiConfig.Register);
RouteConfig.RegisterRoutes(RouteTable.Routes);
This could be because the path was wrong. So check the path and the spelling of the controller first.
In my case, my controller was named CampsController, and the WebApiConfig.cs file had an extra path in it.
Instead of:
http://localhost:6600/Camps
It was:
http://localhost:6600/api/Camps
I had not noticed the api word in the WebApiConfig.cs file:
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
Also it could be because the controller was incorrectly named. Here I called LayoutController, but should have called Layout instead:
<a class="nav-link" href="#">#Html.Action("GetCurrentUser", "LayoutController" })</a>
should be:
<a class="nav-link" href="#">#Html.Action("GetCurrentUser", "Layout")</a>
Another example, it could be because you have bad Route paths defined. Make sure your paths are correct.
Example:
[RoutePrefix("api/camps")]
public class CampsController : ApiController
[Route("{moniker}")]
public async Task<IHttpActionResult> Get(string moniker)
If appropriate to your design, you can make sure the access modifier on your controller class is 'public', not something that could limit access like 'internal' or 'private'.
I hope this helps someone else. I had this problem because, while I had the controller named properly, the class inside the file had a typo in it. I was looking for OrderSearch and the file was OrderSearchController.cs, but the class was OrdersSearchController.
Obviously, they should match, but they don't have to, and your route targets the class, not the filename.
Embarrassingly, the problem in my case is that I haven't rebuilt the code after adding the controller.
So maybe the first thing to check is that your controller was built and is present (and public) in the binaries. It might save you few minutes of debugging if you're like me.
Building on this answer by George, I found in my case that I had set my controller up properly as ThingController and I had a properly defined method on that controller Edit.
But.. I was referencing it in my view with
<a href="/App/ThingController/Edit" />
Where I should have been just using the name without the word controller like
<a href="/App/Thing/Edit" />
Somebody added this to a View.
#Scripts.Render("~/bundles/jqueryval")
Then they added the BundleConfig.cs file in the App_Start Folder.
In the RegisterBundles Method they had:
bundles.Add(new ScriptBundle("~/bundles/jquery").Include("~/Scripts/jquery-{version}.js"));
However, they forgot to finish wiring this up in the Global.asax.cs File.
To Fix, all I had to do was add this to the Application_Start Method in Global.asax.cs:
RouteConfig.RegisterRoutes(RouteTable.Routes);
Note: I think the ordering/placement of this Line in the Application_Start Method matters,
so please keep that in mind.
I placed mine immediately after ViewEngines.
In another scenario just I would like to add is In my scenario, the name space was different for controller as it was mistake of copying controller from another project.
In my case of legacy application, the issue occurred when I added below entry in web.config file under the node <system.webServer>
<modules runAllManagedModulesForAllRequests="true"></modules>
When I removed it, the issue resolved.
This problem also occurs if you don't include your controller class for compile-process in the .csproj files.
<Compile Include="YOUR_CONTROLLER_PATH.cs" />
In my case, I was rendering another action method for my menu section in _layout.cshtml file using #Html.Action("Menu", "Menu") whereas I forgot to create Menu controller and as layout file was being used in my current controller action's view therefore I was getting this error in my current action render request. try to look in your layout and as well as view file if you did the same mistake
Or maybe you missed keyword "Controller" at the end of controller name ;)
For me, I was running the IIS Express https://localhost:1234/pg/Abc/Page
But register the web in IIS like https://localhost:1234/Abc/Page
So in calling web page I was calling the first link with /pg/ which is throwing Not Found Exception.
Pretty new to MVC I have a page on an open source application I have downloaded that is at the url...
http://localhost:51930/admin/login?databaseIssue=true
Obviously Im trying to find which controller and view this maps to in the application. How do I work this out? What should I search for and where to look?
Also how do I work out which actions process this view?
This should help you out. This tool is awesome!
http://haacked.com/archive/2008/03/13/url-routing-debugger.aspx
This guide should get you started. Basically you work with a collection of routes and their arguments, in the global.asax.cs file. The guide there also has a section on custom routes.
By the defaulting routing rules, it's {controller}/{action}/
Which would make the controller in http://localhost:51930/admin/login?databaseIssue=true admin and the action Login.
By convention, MVC routes are generated in form
{app_base}/{controller}/{action}
Check out this stackoverflow question for more information.
So in your case, you'll want to look for an admin.cs class in your Controllers folder.
global.asax is where the route mapping is defined.
You'll see/set something like:
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}", // URL with parameters
new { controller = "Home", action = "Index", id = UrlParameter.Optional }
so by default, your example maps to admin = {controller} and login = {action} and login action method would take the databaseissue=true bit as a parameter.
All these answers are good, except in the case where someone may have created a custom route to the specific url in question. By default, they are all correct, but if a custom route was setup, it could be going to the StackController and referencing the Overflow action.
Like Jamie R Rytlweski suggested above, reference RouteDebugger in your project, add the hook in your global.asax and try going to that page, it will show you a listing of all the routes defined in your application and then show you which routes the current page matches
In Visual Web Developer when I "run" my Controller (TestApp) I come up with this:
http://postimage.org/image/iggcs6hw/
I've tried adding "/TestApp" on the end of the local host address in the address bar and that gave me this result:
http://postimage.org/image/ih078cf8/
I don't think I've misspelled anything. Forgive me if this question is a stupid one, just trying to get my feet off the ground :D.
Make sure you have renamed the default ~/Views/Home folder that was generated when you created your project into ~/Views/TestApp folder. As far as the first error message is concerned make sure you have modified the default routes in Global.asax to make the TestApp controller the default one instead of Home:
routes.MapRoute(
"Default",
"{controller}/{action}/{id}",
new { controller = "TestApp", action = "Index", id = UrlParameter.Optional }
);
So to sum up:
Make sure that you have an Index.aspx view inside the ~/Views/TestApp folder.
Make sure that you have set the TestApp controller in the default route in Global.asax
Make sure that your TestApp controller has an Index action
Now you will be able to call your application like this: http://example.com/ which will automatically call the Index action on TestApp controller which will render the ~/Views/TestApp/Index.aspx view.
Make sure your views are in the /Views directory. MVC follows a strict folder structure and this happens when it can't find something.
When adding a new view or controller to an MVC project, it's best to use the wizard provided for that purpose.
I have the following in my Global.asax.cs
routes.MapRoute(
"Arrival",
"{partnerID}",
new { controller = "Search", action = "Index", partnerID="1000" }
);
routes.MapRoute(
"Default",
"{controller}/{action}/{id}",
new { controller = "Home", action = "Index", id = "" }
);
My SearchController looks like this
public class SearchController : Controller
{
// Display search results
public ActionResult Index(int partnerID)
{
ViewData["partnerID"] = partnerID;
return View();
}
}
and Index.aspx simply shows ViewData["partnerID"] at the moment.
I have a virtual directory set up in IIS on Windows XP called Test.
If I point my browser at http://localhost/Test/ then I get 1000 displayed as expected. However, if I try http://localhost/Test/1000 I get a page not found error. Any ideas?
Are there any special considerations for running MVC in a virtual directory?
IIS 5.1 interprets your url such that its looking for a folder named 1000 under the folder named Test. Why is that so?
This happens because IIS 6 only
invokes ASP.NET when it sees a
“filename extension” in the URL that’s
mapped to aspnet_isapi.dll (which is a
C/C++ ISAPI filter responsible for
invoking ASP.NET). Since routing is a
.NET IHttpModule called
UrlRoutingModule, it doesn’t get
invoked unless ASP.NET itself gets
invoked, which only happens when
aspnet_isapi.dll gets invoked, which
only happens when there’s a .aspx in
the URL. So, no .aspx, no
UrlRoutingModule, hence the 404.
Easiest solution is:
If you don’t mind having .aspx in your
URLs, just go through your routing
config, adding .aspx before a
forward-slash in each pattern. For
example, use
{controller}.aspx/{action}/{id} or
myapp.aspx/{controller}/{action}/{id}.
Don’t put .aspx inside the
curly-bracket parameter names, or into
the ‘default’ values, because it isn’t
really part of the controller name -
it’s just in the URL to satisfy IIS.
Source: http://blog.codeville.net/2008/07/04/options-for-deploying-aspnet-mvc-to-iis-6/
If you are doing this on Windows XP, then you're using IIS 5.1. You need to get ASP.Net to handle your request. You need to either add an extension to your routes ({controller}.mvc/{action}/{id}) and map that extension to ASP.Net or map all requests to ASP.Net. The http://localhost/Test works because it goes to Default.aspx which is handled specially in MVC projects.
Additionally, you need to specify http://localhost/Test/Search/Index/1000. The controller and action pieces are not optional if you want to specify an ID.
There are a number of considerations when using virtual directories in your application.
One is particular is that most browsers will not submit cookies that came from one virtual directory to another, even if the apps reside on the same server.
Try set virtual path: right click on mvc project, properties, web tab, there enter appropriate location.