assign the selected value of dropdown list to a session variable

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I'm creating the dropdown list dynamically. I want to assign the selected value of dropdown list to a session variable in javascript.

I'm having a javascript fn. as follows:
How to attain this task. Please help

C#

function assignSession()
       {var valDropdown = document.getElementById("countName").value;

               <% Response.Session["cId"+valDropdown); %>
       }

Posted 28-Jun-13 9:21am

sunpop

Updated 28-Jun-13 19:46pm

v3

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2 solutions

Solution 1

Create SelectedIndexChanged Event for dropdownlist now in codebehind

C#

Protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
     Session["value"] = DropDownList1.SelectedValue;
}

Posted 28-Jun-13 9:28am

Asp_Learner

v2

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sunpop 29-Jun-13 1:07am

But, I'm creating the dropdown list dynamically. I want to assign the selected value of dropdown list to a session variable in JAVASCRIPT

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_Amy · Accepted Answer · 2013-06-28T20:03:00

No, it's not possible. JavaScript is client-side scripting, and Session variables are stored server-side. The ASP.Net will always execute before the JavaScript. For more details you can check:
ASP.NET Application and Page Life Cycle[^]
ASP.NET Page Life Cycle Overview[^]

To prevent entire page PostBack you can use Asp.Net Update Panel[^]. Keep your dynamic created controls in Update Panel.

Or you can Call a Web Service using Javascript[^] and assign the session variable in that.

--Amit