function return json and want to call another function

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I have a function which is return the JSON object, i am calling this function into another function.
in second function didn't read the first json object and getting undefined error in javascript.

JavaScript

var var1={};

function function1()
{
//calling weservice retuning the json data successfully 
return data;
};

function function2()
{
var var1= function1();

alert("show username :" +var1.UseName);  //now here i am getting the undefiend error in alert box
}

Posted 7-May-14 2:34am

Unareshraju

Updated 7-May-14 2:36am

Kornfeld Eliyahu Peter

v2

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Kornfeld Eliyahu Peter 7-May-14 8:38am

Undefined on UserName?

Unareshraju 8-May-14 0:08am

yes exactly getting same error on UserName as undefined

Vi(ky 7-May-14 8:40am

make sure your json data is correct

Unareshraju 8-May-14 0:06am

function returns the json data correctly

Kornfeld Eliyahu Peter 8-May-14 1:52am

Can you show us a sample JSON data function1 returns?

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Nitij · Answer 1 · 2014-05-07T19:59:00

The problem with your code seems to be related with async operation delay. When you call function1() and expect to get the result in var1 then you will get the result only after the successful completion of your web service call in function1().
However your alert() is being called before any data is actually returned from the async call and hence you get undefined error.

So the solution is to call the alert() when your async operation has been completed successfully. For example use jQuery to call your web service and assign success and failure callbacks appropriately:

$.ajax({
    type: "POST",
    url: 'Web Service Url',
    data: JSON.stringify(Data),
    contentType: 'application/json; charset=utf-8',
    dataType: 'json',
    success: function (result) { alert("show username :" + result.UserName); },
    error: function (e) { }
});

I hope you are understanding this correctly. :)