How can I set session variables with JavaScript

I would like to set a couple of session variables when I click an image on the page. The session variables will be equal to textboxes on the same page as the image: Here is the tag for the image.

<a onclick="window.open('../../Process.aspx','cal','width=490,height=420,left=500,top=180,scrollbars=no')"

href="javascript:;"><img alt="Process" src="../../images/register.gif" style="border-top-style: none; border-right-style: none; border-left-style: none; border-bottom-style: none" id="IMG1" onclick="return IMG1_onclick()" /></a>

function IMG1_onclick() {

Session("Amount") = Me.txtAmount.Text

Session("Zip") =Me.txtZip.Text

}

</script>

Re: How can I set session variables with JavaScript

cant unless you use ajax.

http://www.jguru.com/faq/view.jsp?EID=1300197

Re: How can I set session variables with JavaScript

No, sessions can't be accessed by javascript directly. It's stored on server, while javascript is running on client.
But can be done indirectly, e.g., store it in a hidden filed, submit it to the server, and retrieve and assign the values in hidden filed to session.
Hope it helps.

Re: How can I set session variables with JavaScript

Is it possible to pass the values of a couple of textboxes from one form to another without using querystring, session, ajax, or java?

What Ineed is when a page opens it invisiably gets the value of a couple of textboxes from the previous page.

I appreciate any suggestions.

Re: How can I set session variables with JavaScript

There is a new feature called cross page postback in asp.net 2.0, it may meet your need.
Working with Cross Page Posting Using ASP.NET 2.0

Re: How can I set session variables with JavaScript

Hi Jack,

I discovered that client and server side got communicated better than what I was originally thinking, by using Response and Request object, web app maintences client and server data integrity very well. I do verified that on server side when you want to read client data, e.g. a cookie, you can use Request.Cookie; and vise versa when you want to set a client side cookie, use Response.Cookie.

So i dare this assumption to session, and did following client side trying in Javasript, amazingly found, it succeeded.

<%Session["tbActionItem" + "1"] = "abc"; %>

However, I am stocked when I use:

<%Session["tbActionItem" + "(i + 1)"] = "abc"; %> // i is a var in the javascript.

So my question is how to involve a javascript variable in a inbed session index?

Anyone get answer?

Re: How can I set session variables with JavaScript

here you go

var myvar = "Hey Buddy";

'<%Session["temp"] = "' + myvar +'"; %>' ;

alert('<%=Session["temp"] %>');

Happy Programming...!

Re: How can I set session variables with JavaScript

MuhammadHassan
var myvar = "Hey Buddy";
'<%Session["temp"] = "' + myvar +'"; %>' ;

alert('<%=Session["temp"] %>');

Does this really work? the javascript is executing on the client side.

Re: How can I set session variables with JavaScript

yeeeh it works for me why dont you run it. Make sure to Mark as answer if it works for you too.

Thank you

Re: How can I set session variables with JavaScript

no realy it is not working like a session it is just working like normal variable.

i need to set session value in one js method and use it on body load of the next page

i am doing this on master page for making tab selected for current page

Re: How can I set session variables with JavaScript

Hi rajender,

I am facing the same problem..if u have the code please give me..

Regards

Sahaya Arul Sekar.K

Re: How can I set session variables with JavaScript

i dont know how it works for you!

i am also using the same code but i am getting the variable as string not the actual value.

Any help is appreciated

Re: How can I set session variables with JavaScript

Yes, you can totally do it.

Here's the recipe for success:

Add an ASP.NET AJAX ScriptManager to your page.
Create a simple ASMX Web service using Visual Studio.
Uncomment the Attribute directly above the class definition that reads [System.Web.Script.Services.ScriptService] to enable ASP.NET AJAX to see your web methods.
Create a method to get or update data in your session, and make sure the Attribute above the web method reads [WebMethod(EnableSession = true)] so you can have access to the session via your web service method.
Add a <Services> section to your ScriptManager.
In the <Services> section add a <ServiceReference> element with the Path attribute set to the path of your .asmx page.

OK, so that enables the ability to access your session from the client side!

But here's the really awesome part... if you include a reference to the web service in your .js file like so:

///<reference path="~/MyService.asmx" />

...you will get IntelliSense in the JavaScript for your web service methods! it's very cool!

So then you just call your web service methods like you would any other JavaScript function. It's totally easy and almost magical. It's one of my favorite features of ASP.NET AJAX.

Hope this helps!

EDIT: Oh I should mention that not only can you do it, you will actually love doing it after you get used to the process!

Re: How can I set session variables with JavaScript

Hey evankstone,

thats awesome, it worked.

thats what i call a reply on forums.

thanks a lot.

Re: How can I set session variables with JavaScript

Great!!! I'm really glad it worked for you!

Re: How can I set session variables with JavaScript

Am following the same code, but when I access the webservice function inside my .js file, its returning "undefined" .How will I include a reference to the web service in the .js file so I can debug? Please lemme know

Re: How can I set session variables with JavaScript

I see that this thread is three years old and that we're probably just discussion this of academic interest, but really the answer was posted in 2007 by Raymond Wen: Cross page posting. The need for Ajax only arise if there is a requirement that the values are stored instantly upon editing, and not only on navigating to the next page. OP does not say anything about this.

Re: How can I set session variables with JavaScript

Hi!

i tried this.........

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
    <script type="text/javascript">

    function OpenReconcile(referenceNumber) {
        alert('<%=Session["temp"] %>');


        var myvar = "Divyesh";
        '<%Session["temp"] = "' + myvar + '"; %>';

        alert('<%=Session["temp"] %>');

    }
</script>

</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
        <div/>
        <asp:Button ID="Button1" runat="server" Text="Button JavaScricpt" OnClientClick="OpenReconcile('referenceNumber'); return false;" />
        <asp:Button ID="Button2" runat="server" Text="Button Only Text" OnClick="button2click" />
        <asp:Button ID="Button3" runat="server" Text="Button Set Session" OnClick="button3Click" />
    </div>
    </form>
</body>
</html>

Code behind..........

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication1
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void button2click(object sender, EventArgs e)
        {
            TextBox1.Text = Session["temp"].ToString();
        }

        protected void button3Click(object sender, EventArgs e)
        {
            TextBox2.Text = Session["temp"].ToString();
            Session["temp"] = "Mitesh";
            TextBox1.Text = Session["temp"].ToString();
        }
    }
}

I tried this because I wanted to access session variable set from client side in to my code behind, but it didnt work. I dont know what am I doing wrong? but I was able to set session vriable in code behind and access it on client side, but the session variable set on client side, shoe me as - ' + myvar + ' I dont know why?

can you please reply me back with the solution?

Thanks in advance.

Re: How can I set session variables with JavaScript

There is no impossible, anything can be done

i set session from javascript by very semple way !

step 1

create transitional file to call any function on server

let's

1- create file with tis name ( trnsitional_file.php ) you can change it to any name but my example like this

copy this code into it and save

code--------------------------start of phpt code

<?php

session_start();
$_SESSION['js_var'] =$_GET['js_var'];
?>
session value is = <?php echo $_SESSION['js_var']; ?>

<html>
<head>
<script type="text/javascript">

function SET_SESSION(SESSION_VALUE){
var url = '<iframe src="trnsitional_file.php?js_var='+SESSION_VALUE+'"></iframe>';
document.getElementById("invisible_div").innerHTML=url;
}

SET_SESSION("am SESSION value");
</script>
</head>

<body >
<input type="button" value="SET SET SESSION" onClick='SET_SESSION("NEW SESSION ONCLICK")'>

<div id="invisible_div" style="width:600px; height:200px; visibility:visible"></div>

<script type="text/javascript">
SET_SESSION("ANY THING");
</script>

</body>
</html>

code--------------------------end of php code


2-create anther html file in any name or just copy function to you file

copy this javascript to your file don't forget to create DIV in your body you can make it hidden.

code--------------------------start of javascript code



code-------------------------- end of js code
you can use this function any where 

sorry for my english!
Engineer Yahya Al-Salmani Saudi Ariba

Re: How can I set session variables with JavaScript

I simply use

<%Session["aux1_7"]="7";%>;

I use this within a Javascript method (it will work anywhere in Javascript).

Make sure that both semicolons are there (one for C# the other for Javascript).

The reason this works is because anything between the "<%" and "%>" runs at the server

thus creating a session variable in this case.