ASP MVC 4 Web Api wraps my json result

Question

My WebApi action returns a dynamic object built from JObject.parse(jsonString);

I have GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();

But that object is wrapped inside a default result message in the response.

According to this article returning anonymous objects is fine and should give the expected result

I am using an async controller because I have to await some ReadAsStringAsync() here the protoype of my action:

public async Task<dynamic> Pics(string flavor, int pagesize)

Expected result :

{"flavor":"","maxFeedSize":0,"mediaContent":[]}

Result I have when returning the dynamic object:

{
        "Result": {
            "flavor": "",
            "maxFeedSize": 0,
            "mediaContent": []
        },
        "Id": 1,
        "Exception": null,
        "Status": 5,
        "IsCanceled": false,
        "IsCompleted": true,
        "CreationOptions": 0,
        "AsyncState": null,
        "IsFaulted": false
    }

I'm unclear what you are asking. What is the behavior you're expecting, and what behavior are you actually getting? — Robert Harvey
– Robert Harvey, Commented Nov 27, 2012 at 1:01
By the looks of things you're getting a serialized Task<dynamic>... can you post all of your controller action code? — ten5peed
– ten5peed, Commented Nov 27, 2012 at 1:10

MiniScalope · Accepted Answer · 2012-11-27 01:29:25Z

1

As I thought and as mentioned in comments. I was returning a Task<Task<dynamic>> because of a naive method overload.

    public async Task<dynamic> Pics(string flavor, string pagesize)
    {
        return Pics(flavor, pagesize, null);
    }

Edit: I tried this because unlike MVC routes ommit a string parameter throws an error even if string is nullable

  public async Task<dynamic> Pics(string flavor, string pagesize, string startid =null)

works fine :)

edited Nov 27, 2012 at 1:29

answered Nov 27, 2012 at 1:19

MiniScalope

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1 Comment

Stephen Cleary Over a year ago

Or you could make your overload non-async (tip: listen to your compiler warnings). Like this: public Task<dynamic> Pics(string flavor, string pagesize) { return Pics(flavor, pagesize, null); }

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