ASP.net web api 2 Route-Attribute not working

问题

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 });

回答1:

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

回答2:

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

回答3:

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

回答4:

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

回答5:

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.

回答6:

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

回答7:

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

来源：https://stackoverflow.com/questions/28067419/asp-net-web-api-2-route-attribute-not-working

标签

.net

asp.net-web-api

routing