Javascript null value sent erroneously to method

Question

Javascript code:

var x = null;
var action_data = {x:x};
$.get(
  '~/MyController/MyAction',
  action_data,
  function(result){
    //do_something
  }
);

Controller action:

public class MyController: Controller{
  ...
  public ActionResult MyAction(string x)
  {
    //here, x is the string 'null';

  }
}

Can someone explain to me why the string "null" is sent to the action instead of the value null? Thanks

because u set var x = null; it is passed as string

Zaheer Ahmed
– Zaheer Ahmed

2013-12-12 09:07:02 +00:00
Commented Dec 12, 2013 at 9:07 — Zaheer Ahmed
– Zaheer Ahmed, Commented Dec 12, 2013 at 9:07

Zaheer Ahmed · Accepted Answer · 2013-12-12 09:13:43Z

1

because u passed data null which converted to string and set to your action:

var x = null;
x="any thing"; // you need to change x value to be sent here
var action_data = {x:x};
$.get(
  '~/MyController/MyAction',
  action_data,
  function(result){
    //do_something
  }
);

if you want to pass null:

var x;
var action_data = {x:x};
$.get(
   '~/MyController/MyAction',
   action_data,
   function(result){
     //do_something
   }
 );

edited Dec 12, 2013 at 9:13

answered Dec 12, 2013 at 9:08

Zaheer Ahmed

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1 Comment

Silviu Preda Over a year ago

I actually want the value to be null in some cases. So in my method, i want (x == null) to be true

Silviu Preda · Accepted Answer · 2013-12-12 09:12:54Z

0

Ok, so thanks to Ahmed, i came up with the solution:

var x; //without the null initialization

does the trick ;)

answered Dec 12, 2013 at 9:12

Silviu Preda

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