CODEWITHSUNDEEP
asp.net-mvcundefined
djerid
djerid

Reputation: 309

A public action method 'undefined' was not found on controller '#######'

Maday, i'm getting this error logged in db any idea or clue to fix this intermittent asp.net mvc exception. thanks

Unhandled System.Web.HttpException (0x80004005): A public action method 'undefined' was not found on controller '#######'.
   at System.Web.Mvc.Controller.HandleUnknownAction(String actionName)
   at System.Web.Mvc.Controller.ExecuteCore()
   at System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext)
   at System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext)
   at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__4()
   at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass1.<MakeVoidDelegate>b__0()
   at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End()
   at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)    at System.Web.Mvc.Controller.HandleUnknownAction(String actionName)
   at System.Web.Mvc.Controller.ExecuteCore()
   at System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext)
   at System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext)
   at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__4()
   at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass1.<MakeVoidDelegate>b__0()
   at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End()
   at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult)
   at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Upvotes: 1

Views: 6981

Answers (2)

Ian Campbell
Ian Campbell

Reputation: 2748


I have discerned a possible way to fix the image URL routing problem, based on @Dan's helpful answer:

So, because I have this "catch-all" route for 404 errors in my RouteConfig.cs: 

// for 404-error page routing
routes.MapRoute(
    name: "Error",
    url: "{*url}",
    defaults: new { controller = "Error", action = "PageNotFound" }
);


...MVC is oddly interpreting images that I have loaded via a Razor @foreach statement as URL's:

// this is triggering the weird problem, dunno why:
@foreach (string image in this.Model.ImageArray)
{
    <img src="@this.Url.Content(image)" title="foobar" alt="@image" />
}


The Exception type is HttpException and the Exception message generated is:

A public action method '[object HTMLImageElement]' was not found on controller 'MyWebsite.Controllers.HomeController'


Placing routes.IgnoreRoute("MyImageFolderPath/{*pathinfo}"); at the top of the RegisterRoutes method in my RouteConfig.cs did not resolve this issue, but this did:

routes.IgnoreRoute("[object HTMLImageElement]");


It still seems hackish though, and due to my poor implementation of handling 404-errors...

You can verify that it works though by sprinkling breakpoints throughout your RouteConfig.cs, and also in the Application_Error method in Global.asax.cs (if you are also handling HttpException errors there).

Upvotes: 0

PeaceFrog
PeaceFrog

Reputation: 717

I can't say for sure, but I suspect this is the result of a URL being constructed in JavaScript where a variable is not being defined.

Something like:

var action
var url = '/myContoller/' + action

This will result in a request to:

/myContoller/undefined

The intended URL could be for something that isn't even intended to be an MVC route. It could be for an image or something.

var imageUrl
var url = '/folder/' + imageUrl

/myFolder/undefined

MVC will try to route that, depending on how your routing is configured.

Is there any information in your logs about where the requests are coming from?

Update 1:

If you want MVC to ignore all requests to a particular area of your site (images directory for example), you can do something like this:

routes.IgnoreRoute("images/{*pathinfo}");

Upvotes: 1

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