jquery - ASP.NET API Not Found If Not On Main View -

i have apicontroller in simple mvc project (.net 4.5.2, mvc 5.2.3, ef 6.1.3, api 2.2). shown here:

namespace myapplication.pm.controllers.api {     public class applicationusercontactapicontroller : apicontroller     {         private applicationdbcontext db = new applicationdbcontext();          // get: api/applicationusercontactapi/5         [responsetype(typeof(contact))]         public async task<ihttpactionresult> getcontact(guid id)         {             contact contact = await db.contacts.singleordefaultasync(c => c.applicationuserid == id);             if (contact == null)             {                 return notfound();             }              return ok(contact);         }     } }   

registering route default (was added when added api):

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

i calling api via ajax on partial view (out-of-the-box _loginpartial.cshtml) so:

<script src="~/scripts/jquery-2.1.4.min.js"></script>         <script type="text/javascript">             var uri = 'api/applicationusercontactapi';             var userid = '@user.identity.getuserid()';              $(document).ready(function () {                 $.getjson(uri + '/' + userid)                     .done(function (data) {                         $('.manageaccount').text('hello ' + data.firstname + '!');                     })                     .fail(function (jqxhr, textstatus, err) {                         alert('error: ' + err);                     });             });         </script> 

if login , on main view (start debugging), call api fine. if click on 1 of standard links (again, out-of-the-box template), "not found" message. routing issue , if so, can fix it?

try generate link helper url.action method:

var uri = '@url.action("getcontact", "applicationusercontactapi", new { httproute = "" })'; 

here's related problem: click!