How to assign values from form to Javascript session variables

Question

I am trying to create Javascript Session variables that will read information from one form and pass these variables to another form.

I can assign strings to these Session variables but i cannot assign values from Form elements to these variables

function SetUserName() 
{       
     <% var text1= "Charles";%>
     <%Session["UserName"] =text1;%>
     var session_value='<%=Session["UserName"]%>';
}
</script>

This is the Javascript on the first page which works and on a button click i call another page where i can display this Session Variable.

function LoadUserName()
{
    var username = '<%= Session["UserName"] %>';
    alert(username);
}

This gets called on load of second page. How can i pass values from HTML elements to the Session Variable?

For Example Say i have a Text Box

 <asp:TextBox ID="Address_Box" runat="server"  TextMode="MultiLine"
             MaxLength="200" ></asp:TextBox>

How can I send the text from this box to the session variable?

javascript directly can not "directly" set backend session variable. — Sandeeproop
– Sandeeproop, Commented Jun 5, 2014 at 9:31
Not knowing something doesn't get downvote - I corrected. He's here because he doesn't know — Ali Habibzadeh
– Ali Habibzadeh, Commented Jun 5, 2014 at 9:34
You can use cookies or HTML5 local storage for storing form values. But notice that such data are stored on client's machine which can be wiped away ! — Rahul Gupta
– Rahul Gupta, Commented Jun 5, 2014 at 9:35
Thnks Xgreen, But is it not possible to assign a HTML element value to these variable instead of "Charles". Till now it works fine... — MarsOne
– MarsOne, Commented Jun 5, 2014 at 9:35

Hans Keﬆing · Accepted Answer · 2014-06-05 10:19:50Z

1

Your code:

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

does not "access the ASP.Net session from javascript".

With this code you do generate (during the processing of the request) some text that will be sent to the browser. This text contains the string that results from the expression Session["UserName"].

Once this text arrives at the browser it is interpreted as javascript. This javascript has no knowledge of any session values or the fact that it was (partly) generated.

You need to find some way to send data from the browser back to the server (using postback or ajax, for instance) before it can be stored in Session.

answered Jun 5, 2014 at 10:19

Hans Keﬆing

39.6k10 gold badges84 silver badges119 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

matt_lethargic · Accepted Answer · 2014-06-05 10:10:41Z

1

You would have to put this somewhere in your c# code.

Session["UserName"] = Address_Box.Text;

For a more complete answer I'd have to see more of your code. For a better solution you'd have to explain what you're trying to achieve

answered Jun 5, 2014 at 10:10

matt_lethargic

2,8161 gold badge21 silver badges33 bronze badges

Collectives™ on Stack Overflow

How to assign values from form to Javascript session variables

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related