Define session variable in c# get it from javascript

Question

I'm saving string that represents the URL in a session variable from my code behind like this:

        String mois = Request.QueryString["mois"].ToString();
        String m = mois;


        String moisnom = Request.QueryString["moisnom"].ToString();
        String annee = Request.QueryString["annee"].ToString();
        String dt = Request.QueryString["date"].ToString();
        String user = Request.QueryString["user"].ToString();
        String where = "jour.aspx?mois=" + mois + "&moisnom=" + moisnom + "&annee=" + annee + "&date=" + dt + "&user=" + user + "&cp=all" + "&usl=" + Request.QueryString["usl"].ToString();
        Session["togo"] = where;

And then I try to get it like this in JavaScript like this:

    var togo = '<%=Session["togo"]%>';
    //  i also tried this var togo ='@Session["togo"]'; 
    var newPage = togo; // this should contain a string with the url to go to

But when I use it it uses it as a string here is what my URL looks like:

http://localhost:50311/<%=Session["togo"]%>
 or
http://localhost:50311/@Session["togo"]

How else can I access the session variable or what am I doing wrong please?

 EDIT: 
like you suggested i already tried using the hidden field like this 

     yes  i tried that but then i had this problem here is the definition of the hidden field  

             <input type="hidden" value="aa" id="myHiddenVar" runat="server"/>

then i tried giving it the value i need on click

            String where = "jour.aspx?mois=" + mois + "&moisnom=" + moisnom + "&annee=" + annee + "&date=" + dt + "&user=" + user + "&cp=all" + "&usl=" + Request.QueryString["usl"].ToString();
        myHiddenVar.Value= where;

and this is how i tried getting it from the js file

       var togo = $('#myHiddenVar').val();
       var newPage = togo;

but it takes the default value meaning "aa" as in value="aa" i gues cause the script is executed before the assignment of the variable any way how to reverse that order ?

Is that javascript in a separate js file? The asp.net specific syntax (<% .. %>) does not work there, only in files (aspx, ascx, cshtml) that are processed by the asp.net engine. — Hans Keﬆing
– Hans Keﬆing, Commented Dec 15, 2015 at 11:23
yes its in a js file do u know any links on how to get the session variables from a js file fuction please ? — Oussema Oz
– Oussema Oz, Commented Dec 15, 2015 at 11:25
if it is in different js file than you cant access it <%xyz%> i.e scriplet tags only work on aspx page... — Sameer
– Sameer, Commented Dec 15, 2015 at 11:41
just remove the value parameter from your aspx page...dont assign anything!! assign value from code behind... — Sameer
– Sameer, Commented Dec 15, 2015 at 11:57
Yeah now it will work!! Just edit value attribute of hidden tag Value="0 " .Even you can remove value attribute — Devesh Pandey
– Devesh Pandey, Commented Dec 15, 2015 at 12:01

Devesh Pandey · Accepted Answer · 2015-12-15 11:41:20Z

1

After Session["togo"] = where; save this Session["togo"] in hidden variable

hiddenVariable= Session["togo"];

Now in JS access that hiddenvariable: suppose ID of hiddenvariable is "hdnxyz"

var togo = $('#hdnxyz').val();

var newPage = togo;

answered Dec 15, 2015 at 11:41

Devesh Pandey

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4 Comments

Devesh Pandey Over a year ago

Yeah now it will work!! Just edit value attribute of hidden tag Value="0 " .Even you can remove value attribute

Oussema Oz Over a year ago

yes it worked but it takes the value assigned by default not the ne i want

Devesh Pandey Over a year ago

Dont assign the default value to it ,okay?

Devesh Pandey Over a year ago

okay then make JS function and inside that function do ur stuff of accesing the hideenvarible

Sameer · Accepted Answer · 2015-12-15 11:43:07Z

1

first of all session resides on server!!!!!!

If it is in different js file than you cant access it <%xyz%> i.e scriplet tags only work on aspx page...

so there is no way to access the session variable on client side..

instead assign your sessio9n value to a hidden variable and then access it using javascript

answered Dec 15, 2015 at 11:43

Sameer

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Comments

Nodiink · Accepted Answer · 2015-12-15 13:07:38Z

0

Write Session element in a asp:HiddenField and then read from it with your js code.

edited Dec 15, 2015 at 13:07

answered Dec 15, 2015 at 11:41

Nodiink

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