ASP.NET Core WebApi

Question

I'm trying to make a web api using the new .NET Core. But having some trouble using the the [HttpPost]. When I use postman, it doesn't return anything. Also when I put a breakpoint on the return line it's never hit.

This is my method in the controller:

    // POST api/values
    [HttpPost]
    public IEnumerable<string> Post([FromBody]string value)
    {
        return new string[] { "value1", "value2" };
    }

The GET method is working:

    // GET api/values
    [HttpGet]
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }

It returns a Json value and when I place a breakpoint it hits.

I think I have to add something somewhere else to map the post to this method, but I can't figure out what.

Update: The post request

This is the Post code generated in Postman:

POST /api/values HTTP/1.1
Host: localhost:60228
Content-Length: 0
Cache-Control: no-cache
Postman-Token: 295f7c89-f5a8-d6cd-d679-ae907b010550

firstName:jantje

please show us the Post request

Ashley John
– Ashley John

2016-11-21 13:03:14 +00:00
Commented Nov 21, 2016 at 13:03 — Ashley John
– Ashley John, Commented Nov 21, 2016 at 13:03
I've added the post request to the question

Ravenix
– Ravenix

2016-11-21 13:07:19 +00:00
Commented Nov 21, 2016 at 13:07 — Ravenix
– Ravenix, Commented Nov 21, 2016 at 13:07

Ralf Bönning · Accepted Answer · 2016-11-21 13:10:52Z

2

Try to post JSON data to your controller action and use a model class to bind the values. I assume the simple string cannot be parsed by the JSON or XML formatters that are used by ASP.NET Core by default.

So this will probably work:

[HttpPost]
public IActionResult Post([FromBody]DataModel model)
{
    return Ok();
}

public class DataModel {
     public string FirstName {get; set;}
}

with this JSON data

{
    firstName: "jantje"
}

answered Nov 21, 2016 at 13:10

Ralf Bönning

15.7k6 gold badges56 silver badges71 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Oscar Llop · Accepted Answer · 2017-06-09 10:31:13Z

0

I've found myself in the same situation and the reason was that i send text/plain request instead of application/json request.

After this change I was able to send a simple string to the HttpPost action. Before the change no breakpoint was hit too.

I've tried it with ValuesController from the WebAPI example and it runs too.

answered Jun 9, 2017 at 10:31

Oscar Llop

2012 silver badges4 bronze badges

Collectives™ on Stack Overflow

ASP.NET Core WebApi

Update: The post request

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

Update: The post request

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related