MVC4 WebAPI Multiple actions were found that match the request

Question

I have searched for a while but none of the help I've found solve my problem. I have a MVC4 WebAPI project and I get the "Multiple actions were found that match the request..." problem.

Here is my controller:

public class DataEntryController : ApiController { [HttpPost] [ActionName("GetMessageId")] public HttpResponseMessage GetMessageId(HttpRequestMessage request) { } [HttpPost] [ActionName("RequestXmlDataEntry")] public HttpResponseMessage RequestXmlDataEntry(HttpRequestMessage request) { } [HttpPost] [ActionName("SendConfirmationXmlDataEntry")] public HttpResponseMessage SendConfirmationXmlDataEntry(HttpRequestMessage request) { } [HttpPost] [ActionName("SendEvent")] public HttpResponseMessage SendEvent(HttpRequestMessage request) { } }

And here is my routes:

public static class WebApiConfig { public static void Register(HttpConfiguration config) { config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional } ); config.Routes.MapHttpRoute( name: "API Default 2", routeTemplate: "api/{controller}/{action}"); config.Routes.MapHttpRoute( name: "API Default", routeTemplate: "api/{controller}/{action}/{id}", defaults: new { id = RouteParameter.Optional }); } }

Here is how my request look like:

public static string PostRequestToRestMethod(string url, string data, IWebProxy proxy, int timeout) { byte[] byteArray = Encoding.UTF8.GetBytes(data); string responseFromServer = string.Empty; HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url); webrequest.Method = "POST"; webrequest.ContentType = "text/xml"; webrequest.ContentLength = byteArray.Length; webrequest.Timeout = timeout; if (proxy != null) webrequest.Proxy = proxy; var dataStream = webrequest.GetRequestStream(); dataStream.Write(byteArray, 0, byteArray.Length); dataStream.Close(); HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse(); using (StreamReader responseStream = new StreamReader(webresponse.GetResponseStream(), Encoding.UTF8)) { responseFromServer = responseStream.ReadToEnd(); } webresponse.Close(); return responseFromServer; }

I'm working with .Net Framework 4.0 so WebAPI 2 is out of the question for me. Any toughts?

No, I removed the inner portion of each method. Is there any other portion that could help me be more specific? — Rafael Kayser Smiderle
– Rafael Kayser Smiderle, Commented Jun 16, 2016 at 14:31
do you also have a WebApiConfig next to youre RouteConfig .. and how does youre request looks like — lordkain
– lordkain, Commented Jun 16, 2016 at 14:36
Oh I see, I've corrected the question. I moved the routes to the correct class but still the same error happened. — Rafael Kayser Smiderle
– Rafael Kayser Smiderle, Commented Jun 16, 2016 at 14:43

Aftab Ahmed · Accepted Answer · 2016-06-16 14:52:56Z

You don't need to create different routs. Your all three routes can be handled with this single route.

public static class WebApiConfig { public static void Register(HttpConfiguration config) { config.Routes.MapHttpRoute( name: "API Default", routeTemplate: "api/{controller}/{action}/{id}", defaults: new { id = RouteParameter.Optional }); } }

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