Multiple actions were found that match the request Web API?

Question

I am using web API and i am new in this. I am stuck in a routing problem. I have a controller with following actions :

    // GET api/Ceremony
    public IEn         


        

Answer 1

Luckily nowadays with WEB API2 you can use Attribute Routing. Microsoft has gone open source on a big scale and then a wizard named Tim McCall contributed it from the community. So since somewhere end 2013, early 2014 you can add attributes like [Route("myroute")] on your WEB API methods. See below code example.

Still - as I just found out - you have to make sure to use System.Web.Http.Route and NOT System.Web.Mvc.Route. Otherwise you'll still get the error message Multiple actions were found that match the request.

using System.Web.Http;
...

[Route("getceremonies")]
[HttpGet]
// GET api/Ceremony
public IEnumerable GetCeremonies()
{
    return db.Ceremonies.AsEnumerable();
}

[Route("getceremony")]
[HttpGet]
// GET api/Ceremony/5
public Ceremony GetCeremony(int id)
{
    Ceremony ceremony = db.Ceremonies.Find(id);
    return ceremony;
}

[Route("getfilteredceremonies")]
[HttpGet]
public IEnumerable GetFilteredCeremonies(Search filter)
{
    return filter.Ceremonies();
}