Question

I am using Visual Studio 2012 RC. I am using the default routes and have the following Web API controller:

public class FooController : ApiController
{
    // GET api/foo
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }

    // GET api/foo/5
    public string Get(int id)
    {
        return "value";
    }

    // POST api/foo
    public string Post(string abc)
    {
        Console.WriteLine("value: {0}", abc);
        return "foo" + abc;
    }

    // PUT api/foo/5
    public void Put(int id, string value)
    {
    }

    // DELETE api/foo/5
    public void Delete(int id)
    {
    }
}

I wanted to do a simple test of POST in Fiddler, so I have

Request Headers

User-Agent: Fiddler

Content-Type: application/json

Request Body

{“abc”: “def”}

When I debug the request, the parameter abc comes in as null, not “def”. Is there something wrong with my Fiddler syntax?

Answer 1

(1) By default, simple types are taken from the URI. To read a simple type from the request body, add the [FromBody] attribute to the parameter.

public string Post([FromBody] string abc)

(2) ‘{“abc”: “def”}’ defines an object with a property named “abc” – to send a JSON string, the request body should just be “def”