Web API 2 RoutePrefix does not working

asp.net-web-api-routing, asp.net-web-api2, c#

Solution

Use attribute routing instead

public class DummyController : ApiController
{
    // GET api/values
    [HttpGet]
    [Route("api/v2/dummy/get")]
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2", "value3" };
    }
}

and if you want route prefix then

[RoutePrefix("api/v2/dummy")]
public class DummyController : ApiController
{
    // GET api/v2/dummy
    [HttpGet]
    [Route("get")]
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2", "value3" };
    }
}

Problem

When defining a RoutePrefix at controller level, when I try to access the API class using the URL with prefix `http://localhost:55020/api/v2/dummy/get` it throws 404. This `http://localhost:55020/api/dummy/get` works absolutely fine though. Here is controller class which has a RoutePrefix defined ``` [RoutePrefix("v2/dummy")] public class DummyController : ApiController { // GET api/values [SwaggerOperation("Get")] public IEnumerable<string> Get() { return new string[] { "value1", "value2", "value3" }; } } ``` Here is WebApiConfig ``` public static class WebApiConfig { public static void Register(HttpConfiguration config) { // Web API configuration and services // Web API routes config.MapHttpAttributeRoutes(); config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional } ); } } ```

Original source