CODEWITHSUNDEEP
asp.net-web-apiodata
Eric Pan
Eric Pan

Reputation: 5

OData Action Parameters is null in run time

I was trying to define a Post OData Web API action.The parameter is a number. I found an article And I followed as the article described, here is the source code:

WebApiConfig.cs

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Web API configuration and services

        // Web API routes
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

        config.MapODataServiceRoute("odata", "odata", model: GetModel());

    }

    private static Microsoft.OData.Edm.IEdmModel GetModel()
    {
        ODataConventionModelBuilder builder = new ODataConventionModelBuilder();

        builder.EntitySet<ThumbnailQueue>("ThumbnailQueues");
        builder.EntitySet<Document>("Documents");


        EntitySetConfiguration<ThumbnailQueue> thumbnailQueue = builder.EntitySet<ThumbnailQueue>("ThumbnailQueues");
        var action = thumbnailQueue.EntityType.Action("PostThumbnailQueue");
        action.Parameter<long>("DocumentSN");


        var postThumbnailQueue = thumbnailQueue.EntityType.Collection.Action("PostThumbnailQueue");
        postThumbnailQueue.Parameter<long>("DocumentSN");

        return builder.GetEdmModel();
    }
}

Web API

public class ThumbnailQueuesController : ODataController
{
    private MarketingEntities db = new MarketingEntities();

    // POST: odata/ThumbnailQueues
    [HttpPost]
    public IHttpActionResult PostThumbnailQueue(ODataActionParameters parameters)
    {
        if (parameters == null) return BadRequest();

        var documentSN = (long)parameters["DocumentSN"];

        if (db.ThumbnailQueues.Any(t => t.DocumentSN == documentSN))
        {
            return BadRequest("Record already exists");
        }

        var myThumbnailQueue = new ThumbnailQueue();
        myThumbnailQueue.DocumentSN = documentSN;
        myThumbnailQueue.Status = 1;
        db.ThumbnailQueues.Add(myThumbnailQueue);


        db.SaveChanges();

        return Ok();
    }

I used Postman to test the function

enter image description here

But in the run time, the parameter is null, so I can not get documentSN from the parameter. I have troubleshoot this porblem for hours, could anybody help me to fix this problem? Many thanks~

Upvotes: 0

Views: 2858

Answers (1)

Andriy Tolstoy
Andriy Tolstoy

Reputation: 6090

You need to use the following route for that: http://localhost:10076/odata/ThumbnailQueues/Default.PostThumbnailQueue

  • ThumbnailQueues - entity set
  • Default - default namespace
  • PostThumbnailQueue - action

Upvotes: 1

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