[Solved] Set Session value on client side code using jQuery in ASP.Net

Please refer below article

Not possible to assign session values directly through javascript. I found alternative ways. Call the code behind function and assign the session values. Javascript Function:

 function InitializeRequest(path) {
      // call server side method
         PageMethods.SetDownloadPath(path);
 }

Code Behind Function:

[System.Web.Services.WebMethod]
public static string SetDownloadPath(string strpath)
{
        Page objp = new Page();
        objp.Session["strDwnPath"] = strpath; 
        return strpath;
}

Must enable page methods set to true

<asp:ScriptManager EnablePageMethods="true" ID="MainSM" runat="server" ScriptMode="Release" LoadScriptsBeforeUI="true"></asp:ScriptManager>