JavaScript - How to Set values to Session in Javascript

Hi,

         I want to set the Dropdown selected value in Session. I have done in Code behind. But for some condition i have to Do in Client Side Itself. i tried the following. but i did't solution yet.

<%Session["Test"] = "Welcome Mamu";%>

var session_value='<%=Session["Test"]%>';

alert(session_value);

The above work fine. Note that i have assign Static value(Welcome Mamu). but for Dynamatic,

var strTest=document.getElementById('DropDownList1').value;

<%Session["Test"] = "'+ strTest +'";%>

var session_value='<%=Session["Test"]%>';

alert(session_value);

It is Working fine in Client Side. But i Server Side(Code Behind), the Session["Test"] value is

'+ strTest +'.

Is any other way to assign values to Session?

 in the ASPX generated page and assign the value of your session variable to one of the element's attributes. The element attribute can then be retrieved from within a JavaScript function.

E.g. (Assuming VBScript) If you have a form on your page, add the following to the ASP code which generates the page:

Response.Write("<input type='hidden' name='fred' value='" & Session("VariableName") & "'>")

In your JavaScript function, find the form element with the name == "fred" and retrieve the value.

hey,

you can do it the in the code behind , its more better:

To it this way:

Session["item"]=Dropdownlist1.Selecteditem.Tostring();

u r right u can use in client side as

client_side_var = "<%=session("var")%>"

in server side

Session["Test"]  =  strTest;

Hi Rajesh Kallakuri,

            thanks for ur reply. but i have to assign in Client side itself. i mean, i have to assign Dropdownlist selected value in the session.

Hi alice johnson ,

            thanks for ur reply. but i have to assign in Client side itself. i mean, i have to assign Dropdownlist selected value in the session.

Hi A K ,

      thanks for ur reply. but i have to assign in Client side itself. i mean, i have to assign Dropdownlist selected value in the session.

You cannot directly set a session variable via JavaScript.

HTTP is a stateless protocol. Each command is executed independently, without any knowledge of the commands that came before it. The Javascript will execute only after the page has rendered and loaded completely.

This line takes effect only AFTER the page has loaded -
var strTest=document.getElementById('DropDownList1').value;

whereas this line would have executed WHILE the page was getting rendered-
<%Session["Test"] = "'+ strTest +'";%>

Due to the different times at which the lines get executed, you will not be able to achieve the functionality you are looking for.

You would have to persist the value that you want to be store inside a Session within a cookie or hidden variable or querystring & fetch it in the next page after it is submitted.

Alternatively, you can use AJAX - http://aselai.blogspot.com/2008/07/set-aspnet-session-variables-with.html

<%--<%Session["SanWardNo"]=txtSanwardNo.Text;%>--%>

where txtSanwardno is a serverside text box