How do I access parameters of my POST request within a controller

Question

Javascript:

$.post("/DataAPI/messageProcessor", { query: "Hello World!" }, function (data) {
  Handle(data); 
}
});

Controller:

[System.Web.Http.AcceptVerbs("Post")]
[System.Web.Http.ActionName("messageProcessor")]
public ResponseModel messageProcessor(string query)
{
  ResponseModel model=DoStuff(query);
  return model;
}

How do I access query from the controller. It always arrives as query == null. There is Request object available too but I am not sure how to navigate through its members to reach my "Hellow World!".

try to use dataType: 'json' – radu florescu Dec 17 '12 at 19:22 — radu florescu, Dec 17 '12 at 19:22

score 2 · Answer 1 · edited Dec 17 '12 at 19:18

2

You need to pass name-value pairs from the client:

$.post("/DataAPI/messageProcessor"
          , { query: "Hello World!" }
          , function (data) {} );

Check jQuery.Post for more details.

edited Dec 17 '12 at 19:18

Leigh

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answered Dec 17 '12 at 19:13

SLaks

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1,964

I tried that too. Still NULL. I modified the original question for your example. Still not working but thanks, – AstroSharp Dec 17 '12 at 19:15
use the dataType: 'json' as param – radu florescu Dec 17 '12 at 19:21

Behnam Esmaili · Answer 2 · 2012-12-17T19:36:29.797

1

try this :

$.post("/DataAPI/messageProcessor", { 'query' : 'Hello World!' }, function (data) {
     Handle(data); 
   }
});

edited Dec 17 '12 at 19:36

answered Dec 17 '12 at 19:15

Behnam Esmaili

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that's no different from the original one I posted `$.post(...,"Hello World!", ...). – AstroSharp Dec 17 '12 at 19:21
i have surrounded key & value with quots. – Behnam Esmaili Dec 17 '12 at 19:26
@AstroSharp have you checked developer tool to see what is posting to server? – Behnam Esmaili Dec 17 '12 at 19:41
Request URL:http://10.200.1.223/DataAPI/messageProcessor Request Method:POST Status Code:200 OK Form Data: Hello World! – AstroSharp Dec 17 '12 at 19:44
1

let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/21283/discussion-between-behnam-esmaili-and-astrosharp) – Behnam Esmaili Dec 17 '12 at 19:46

score 1 · Accepted Answer · answered Dec 17 '12 at 21:27

1

Thanks to a coworker. Solution is as following:

public class QueryClass 
{
public string query { get; set; }
}

public ResponseModel messageProcessor(QueryClass query)
{
  ResponseModel model=DoStuff(query.query);
  return model;
}

answered Dec 17 '12 at 21:27

AstroSharp

1,872
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1

Doesn't surprise me that this works, but I'm still surprised that the solutions posted by others did NOT work. – Eric Petroelje Dec 17 '12 at 21:33
Yes. you are just passing a string to controller and it must get retrieve when you specified datatype as 'string'. If you pass some JSON object, you must need to specify datatype as 'object'. Not sure how this works. But can try this approach if i come across your issue!. – RGR Dec 18 '12 at 04:55
Sorry, but I still don't understand why this work and others don't. ASP.NET MVC allows you to receive a simple string, an int, a complex type, a complex type plus simple parameters, etc. It is smart enough to map the query string or form body into any parameters or object properties from want you want to receive. I'm completely sure that a $.post('/MyController/Action1', { query : 'do stuff'}) will definitely invoke MyController.Action1(String data) – João Simões Dec 18 '12 at 09:20
I meant MyController.Action1(String query) – João Simões Dec 18 '12 at 10:15

How do I access parameters of my POST request within a controller

3 Answers3

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