how to set session and application variable in javascript

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hi......

I want to get and set application and session varible values in javascript.I am able get varible value.I got a soln on one website for setting value of application and session variables.when i am used it got an error.Is there any other way.
My code is
//get variable
var userId = '<%=Application("userId")%>';

//set varible

XML

var myvar = "Hey Buddy";
'<%Application["userId"] = "' + myvar +'"; %>' ;

while set varible value i got an error:
BC30545: Property access must assign to the property or use its value.

if i use the following code

XML

var myvar = "Hey Buddy";
'<%Application("userId") = "' + myvar +'"; %>' ;
alert('<%=Application("userId")%>');

i got an error Character is not valid

Provide a soln.

[Edit]Tag added[/Edit]

Posted 20-Oct-12 1:20am

Vijay Walunj,Navi mumbai

Updated 20-Oct-12 2:32am

Thomas Daniels

v2

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Sanjay K. Gupta · Answer 1 · 2012-10-20T03:01:00

1. take a ScriptManager
2. set it property EnablePageMethods as true
4. write a public static method and mark it attribute as [WebMethod]
5. call above static method from javascript.

C#

[System.Web.Services.WebMethod]
    public static void ChangeSession(string value)
    {
        HttpContext.Current.Session["yourSessionKey"] = value;
    }

in javascript

HTML

<input type="button" value="change session" onclick="ChangeSession('yourNewSessionValue');" />

Dineshshp · Answer 2 · 2012-10-20T01:59:00

Session & Application Are Server Object Which Creates / Modifies & Deletes On Server Only. You Can Get Them In JavaScript Like This :-

var name = '<%= Session["MyName"] %>';

But You Can Not Set Them Because Javascript Runs On Client-End And Can't Effect Server Variable(s).

If U Want To Do This You Should To Create A "XmlHttpRequest" Requset Who Can Send Your Request On Server Via JavaScript And U Can Creates / Modify & Delete Server Variable(s) On Server.

how to set session and application variable in javascript

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