ASP.net web api 2 Route-Attribute not working

Question

I've the following problem, my route attribute is not working.

I have the following action:

[HttpGet]
[Route("~api/admin/template/{fileName}")]
public HttpResponseMessage Template(string fileName)
{
    return CreateHtmlResponse(fileName);
}

and i want to access the action like .../api/admin/template/login.html, so that Template get login.html passed as the file name.

But i alsways get: No HTTP resource was found that matches the request URI 'http://localhost:50121/api/admin/template/login.html'.

The following request works: /api/admin/template?fileName=login.html

Does anyone know, what i am doing wrong with my routing?

EDIT:

My route configuration

config.Routes.MapHttpRoute(
                    "API Default", "api/{controller}/{action}",
                    new { id = RouteParameter.Optional });

@haim770 yes, that is the solution. If you create an answer, i will accept it, thankl you! — BendEg
– BendEg, Commented Jan 21, 2015 at 13:00

haim770 · Accepted Answer · 2015-01-21 13:05:39Z

7

You have to call MapHttpAttributeRoutes() so that the Framework will be able to walk through your attributes and register the appropriate routes upon application start:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();

        // you can add manual routes as well
        //config.Routes.MapHttpRoute(...
    }
}

See MSDN

answered Jan 21, 2015 at 13:05

haim770

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4 Comments

YodasMyDad Over a year ago

I'm not following how this class is actually called?

haim770 Over a year ago

@leen3o Usually, in your Global.asax

YodasMyDad Over a year ago

How would you call this in the global.asax? I don't get where HttpConfiguration comes from.

haim770 Over a year ago

@leen3o, See asp.net/web-api/overview/advanced/configuring-aspnet-web-api

Cem Mutlu · Accepted Answer · 2016-08-28 07:59:00Z

7

Check your Route attribute's namespace. It should be System.Web.Http instead of System.Web.Mvc.

answered Aug 28, 2016 at 7:59

Cem Mutlu

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1 Comment

Alex Over a year ago

Can't upvote more than once :) This is usually the solution to this problem, when you create controlles via rightclick->new controller.

RickIsWright · Accepted Answer · 2015-06-16 20:22:08Z

6

try adding a forward slash after the tilde
[HttpGet]
[Route("~/api/admin/template/{fileName}")]
public HttpResponseMessage Template(string fileName)
{
    return CreateHtmlResponse(fileName);
}

answered Jun 16, 2015 at 20:22

RickIsWright

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Comments

Nikolay K · Accepted Answer · 2016-12-22 03:52:57Z

3

Verify that you are using System.Web.Http.RouteAttribute and not System.Web.Mvc.RouteAttribute

edited Dec 22, 2016 at 3:52

Nikolay K

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answered Dec 21, 2016 at 18:04

Kevin.Debeil

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Comments

Ajay · Accepted Answer · 2015-01-21 12:56:20Z

1

Try this routing in your WebApiConfig

        // Web API routes
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

You have to add RoutePrefix.

edited Jan 21, 2015 at 12:56

answered Jan 21, 2015 at 12:50

Ajay

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4 Comments

haim770 Over a year ago

This routing is for standard MVC controllers, not for API controllers.

Chris Woolum Over a year ago

@haim770, That's actually incorrect... MapHttpRoute is for Web Api. MapRoute is for MVC.

haim770 Over a year ago

@Slick86, See the initial revision

Chris Woolum Over a year ago

Aah, Sorry, missed that

markau · Accepted Answer · 2016-01-11 23:00:15Z

1

With my Web API 2 project I had to add a [RoutePrefix("events")] to the controller for it to pickup the action route attribute.

answered Jan 11, 2016 at 23:00

markau

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Comments

user3014311 · Accepted Answer · 2016-10-14 07:00:21Z

1

In my case, I added Route("api/dashboard") to api controller. Changed it to RoutePrefix("api/dashboard") . And it works perfectly. Also you need config.MapHttpAttributeRoutes(); in webapiconfig.cs

answered Oct 14, 2016 at 7:00

user3014311

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