Is it possible to retrieve a Controller instance for some Url string in ASP.NET MVC3?

Question

if i have an route like /foo/bar/pewpew .. is it possible to get an instance of the controller which that route maps too?

should be... is foo your controller? could you define what each part of your url represents? — Luke Duddridge
– Luke Duddridge, Commented Aug 8, 2011 at 12:46
What do you mean with "return a controller" and what is the controller in your example? — Henk Holterman
– Henk Holterman, Commented Aug 8, 2011 at 12:46
@Henk: Whatever ASP.Net would instantiate if you navigate to that URL. — SLaks
– SLaks, Commented Aug 8, 2011 at 12:48
Where are you planning to use this instance? the MvcHandler does the work of mapping the route values to a controller (which it requests via the ControllerBuilder/DependencyResolver). You user code really starts within a controller already, so what are you trying to do? A use case would be nice point to start. — Matthew Abbott
– Matthew Abbott, Commented Aug 8, 2011 at 12:48
@Matthew Abbot : custom error handling. Previous SO question: stackoverflow.com/questions/6972521/… — Pure.Krome
– Pure.Krome, Commented Aug 8, 2011 at 12:52

SLaks · Accepted Answer · 2011-08-08 12:50:08Z

4

To get the controller name, you can call create a fake HttpContextBase that returns your URL in its Request, then pass it to RouteTable.Routes.GetRouteData and check the area and controller values.

To get the controller instance, pass a RequestContext consisting of that HttpContextBase and RouteData to ControllerBuilder.Current.GetControllerFactory.CreateController.

answered Aug 8, 2011 at 12:50

SLaks

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5 Comments

Pure.Krome Over a year ago

creating a fake HttpContextBase :: which (bare minimum) properties will I need to override for GetRouteData to not throw an exception? (and the rest of the answer makes sense).

Pure.Krome Over a year ago

Hmmm .. not sure why it was removing the @SLaks word from my previous comment... ??

SLaks Over a year ago

@Pure: You don't need to @-address the person who wrote the post you're commenting on.

SLaks Over a year ago

@Pure:I think all you need is Request.Url. Try it and see if you get an exception.

SLaks Over a year ago

Looking at the source, you only need AppRelativeCurrentExecutionFilePath and PathInfo, as well as any properties used by custom IRouteConstraints.

user571646 · Accepted Answer · 2011-08-09 03:05:32Z

1

Try,

        var wrapper=new HttpContextWrapper(System.Web.HttpContext.Current);
        var routeData = RouteTable.Routes.GetRouteData(wrapper);
        var controller = ControllerBuilder.Current.GetControllerFactory().CreateController(new RequestContext(wrapper, routeData), routeData.Values["controller"].ToString());

Update, you can use this instead.

var wrapper = new HttpContextWrapper(new System.Web.HttpContext(new HttpRequest(null, "http://localhost:4836/", null), new HttpResponse(new StringWriter())));

edited Aug 9, 2011 at 3:05

answered Aug 8, 2011 at 13:59

user571646

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1 Comment

Pure.Krome Over a year ago

System.Web.HttpContext.Current might not be the url i wish to use. In fact, it will never be the correct url in my scenario's.

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