Post Parameter is always null, c# api controller

Question

public void PostImport([FromBody]string file)
{}

By debugging I have entered method and see that file is always null, used a number of different requests, one of these should work (have also tried both with capital a for Application/json)? :

C:\>curl -X POST -H "Content-Type: application/json" -d "{\"\":\"myStr\"}" http://localhost:61393/api/admin/import

and

C:\>curl -X POST -H "Content-Type: application/json" -d "{\"file\":\"myStr\"}" http://localhost:61393/api/admin/import

My routes are set up as below

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

routes.MapRoute(
  name: "Default",
  url: "{controller}/{action}/{id}",
  defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);

Try tweak curl arguments to get similar query: stackoverflow.com/a/11517468/458723. The symptoms are same. — Kirill
– Kirill, Commented Jun 5, 2014 at 11:51

Anuraj · Accepted Answer · 2014-06-05 12:05:31Z

1

Can you try this?

curl -i -H "Accept: application/json" -X POST -d "=myStr" http://localhost:61393/api/admin/import

Instead of Content type header use accept header, it should work.

answered Jun 5, 2014 at 12:05

Anuraj

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1 Comment

NimChimpsky Over a year ago

thanks. I find this very weird, why doesn't m$ support valid json ?

Srinivasan MK · Accepted Answer · 2014-06-05 11:39:57Z

0

You should send an header for xhr ("XMLHttpRequest"), only then you would be able to hit your web-api. Try adding below header and run it.

"X-Requested-With": "XMLHttpRequest"

answered Jun 5, 2014 at 11:39

Srinivasan MK

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2 Comments

Kirill Over a year ago

I'm not sure this is answer to the question. @NimChimpsky says he can stop debugger inside PostImport so request definitely reaches application.

Srinivasan MK Over a year ago

@Kirill, I agree with you. I thought in web-api there may be restriction to populate params only when it is a XHR request.

stann1 · Accepted Answer · 2014-06-05 11:42:33Z

0

Make sure your curl syntax is correct. This is the syntax from the curl manual:

curl -d "name=Rafael%20Sagula&phone=3320780" \ 
            http://www.where.com/guest.cgi

Did you try another rest client to test your application (e.g. Fiddler)?

answered Jun 5, 2014 at 11:42

stann1

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