web services - Getting the "no type was found that matches the controller named" error message during Ajax Request -

i've seen lot of topics this, unfortunately believe each case different case (or of them), , love experts opinion case in particular since cannot make code work after reading through of other topics.

situation: using ajax request call in jquery webservice method have created in webapi project mvc 4 application.

my webservice controller class looks default, this:

public class additionalinfocontroller : apicontroller {     //get api/additionalinfo     public ienumerable<string> get()     {         return new string[] { "value1", "value2" };     }      //get api/additionalinfo/5     public string get(int id)     {         return "value";     }      //put api/additionalinfo/5     public void put(int id)     {         string test = "";     } } 

my ajax request jquery looks this:

function getadditionalinfo(obj) {     var request = jquery.ajax({         url: "/api/additionalinfo/get",         type: "get",         data: { id: obj.id },         datatype: "json",         async: false,         beforesend: function () {         },         complete: function () {         }     })     .done(function (a,b,c) {         alert("additional info retrieved successfully!");     })     .fail(function (a,b,c) {         alert("an error happened while trying additional info!");     }); } 

my webapiconfig file looks this:

public static class webapiconfig {     public static void register(httpconfiguration config)     {         config.routes.maphttproute(             name: "defaultapi",             routetemplate: "api/{controller}/{action}/{id}",             defaults: new { id = routeparameter.optional }         );     } } 

and last not least, problem: error message keeps appearing when browse returned data variable in .fail , written:

"{     "message":"no http resource found matches request uri      'http://localhost:59096/api/additionalinfo/get?id=1'.",     "messagedetail":"no type found matches controller named    'additionalinfo'." }" 

i appreciate if me possible. in advance!

best regards,
mad

looking @ error looks web api unable find controller 'type' additionalinfo. web api uses assemblies resolver scan through assemblies , finds out controller types. in case reason unable find 'additionalinfo' controller because has problem loading assembly having controller.

try following , see if there errors logged in eventlog. if notice errors should check if controllers present in assemblies.

• make following change in web.config view errors in eventlog

  <system.diagnostics> <trace autoflush="false" indentsize="4"> <listeners> <add name="mylistener" type="system.diagnostics.eventlogtracelistener" initializedata="webapidiagnostics" /> </listeners> </trace> </system.diagnostics>

• in webapiconfig.cs, can following:

     iassembliesresolver assembliesresolver = config.services.getassembliesresolver();      icollection<assembly> assemblies = assembliesresolver.getassemblies();      stringbuilder errorsbuilder = new stringbuilder();      foreach (assembly assembly in assemblies)     {         type[] exportedtypes = null;         if (assembly == null || assembly.isdynamic)         {             // can't call getexportedtypes on dynamic assembly             continue;         }          try         {             exportedtypes = assembly.getexportedtypes();         }         catch (reflectiontypeloadexception ex)         {             exportedtypes = ex.types;         }         catch (exception ex)         {             errorsbuilder.appendline(ex.tostring());         }     }      if (errorsbuilder.length > 0)     {         //log errors event log         trace.traceerror(errorsbuilder.tostring());     } 

  btw, of above code defaulthttpcontrollertypesresolver web api uses resolve controller types. http://aspnetwebstack.codeplex.com/sourcecontrol/latest#src/system.web.http/dispatcher/defaulthttpcontrollertyperesolver.cs

edited: 1 more scenario hit problem if controller nested inside class. bug fixed later though.