Calling POST method from API controller

Question

I have an API controller named MyFIlesController.

In it, I have this method:

// POST api/myfiles
public void Post([FromBody]string value)
{
}

And here's how I call it with Fiddler:

POST
URL: `http://localhost:58075/api/myfiles`

-------------------------

Request Header:

User-Agent: Fiddler

Host: localhost:58075

Content-Type: application/json

Content-length: 18

-------------

Request body:
{"value": "asjkfsf"}

The method gets called, but value is null. What am I doing wrong?

Answer 1

Create a class that corresponds to your JSON:

public class Test
{
    public string value{get; set;}
    public int ID {get; set;}
}

And then change your Api-action:

// POST api/myfiles
public void Post([FromBody]Test value)
{

}

If you don't want to do that, just change the POST-body:

"somevalue"

EDIT: Added ID to the POST-payload. Now your JSON should look like this:

{"value": "someval",
"ID": 1}

Answer 2

According to the MVC document http://www.asp.net/web-api/overview/working-with-http/sending-html-form-data,-part-1, Which exactly shows the same case as yours

Go to the Sending Simple Types part.

When you sending simple value, you need to

1. Use FromBody Attribute

2. the client needs to send the value with the following format:

   =value

   Specifically, the name portion of the name/value pair must be empty for a simple type.

Anyway, for further enhancement, you'd better use a complex type (an object) to accept the parameter.