OData V3 action in ASP.NET web api doesn't get trigger.

Hi All,

I am using OData V3 endpoints using asp.net with webapi 2.2. I have successfully implemented CRUD operation with it. Now, I would like to add some custom actions along with CRUD operations. I have followed the article ( http://www.asp.net/web-api/overview/odata-support-in-aspnet-web-api/odata-v3/odata-actions ) to create the action with OData V3 with web api. When I type URI: http://localhost:55351/odata/Courses(1101)/AlterCredits, it throws following error:

<m:error><m:code/><m:message xml:lang="en-US">No HTTP resource was found that matches the request URI 'http://localhost:55351/odata/Courses(1101)/AlterCredits'.</m:message><m:innererror><m:message>No routing convention was found to select an action for the OData path with template '~/entityset/key/unresolved'.</m:message><m:type/><m:stacktrace/></m:innererror></m:error>

I have also tried adding a custom route convetion for non-bindable actions. (https://aspnet.codeplex.com/SourceControl/latest#Samples/WebApi/OData/v3/ODataActionsSample/ODataActionsSample/App_Start/WebApiConfig.cs ) Not sure if I have to use this. 

Here is my code:

WebApiConfig.cs :---

namespace ODataV3Service
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            IList<IODataRoutingConvention> conventions = ODataRoutingConventions.CreateDefault(); //Do I need this?
            //conventions.Insert(0, new NonBindableActionRoutingConvention("NonBindableActions"));
            // Web API routes                        
            config.Routes.MapODataRoute("ODataRoute","odata", GetModel(), new DefaultODataPathHandler(), conventions);
        }

        private static IEdmModel GetModel()
        {
            ODataModelBuilder modelBuilder = new ODataConventionModelBuilder();
            modelBuilder.ContainerName = "CollegeContainer";
            modelBuilder.EntitySet<Course>("Courses");
            modelBuilder.EntitySet<Department>("Departments");

            //URI: ~/odata/Course/AlterCredits
            ActionConfiguration atlerCredits = modelBuilder.Entity<Course>().Collection.Action("AlterCredits");
            atlerCredits.Parameter<int>("Credit");
            atlerCredits.Returns<int>();

            return modelBuilder.GetEdmModel();
        }
    }
}

CoursesController.cs:----

[HttpPost]        
        //[ODataRoute("AlterCredits(key={key},credit={credit})")]
        public async Task<IHttpActionResult> AlterCredits([FromODataUri] int key, ODataActionParameters parameters)
        {            
            if (!ModelState.IsValid)
                return BadRequest();

            Course course = await db.Courses.FindAsync(key);
            if (course == null)
            {
                return NotFound();
            }

            int credits = course.Credits + 3;

            return Ok(credits);
        }

Global.asax:----

namespace ODataV3Service
{
    public class WebApiApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            GlobalConfiguration.Configure(WebApiConfig.Register);
        }
    }
}

I have done research online and found this link. http://stackoverflow.com/questions/24616108/web-api-and-odata-pass-multiple-parameters But this one is for OData V4. I am using OData V3 and Action.

Thanks,