I am using the following article to keep my session alive in my asp.net application.
But when I checked the session variable value using alert in javascript I didn't find anything. alert('<%=Session["Heartbeat"]%>');
Actually In my webpage there is no postback. All the work I am doing from Jquery Ajax. When there is any postback only then the solution of that article works. But I want to keep my session alive without any postback.
Please help guys.....
alert('<%=Session["Heartbeat"]%>'); will not work without fully postback, because <%=Session["Heartbeat"]%> is a server-side code.
In order for Session to keep alive, all you need is just a simple Ajax call to server.
Easiest way to implement ASHX generic handler, and call it via Ajax. For example,
<%@ WebHandler Language="C#" CodeBehind="Ping.ashx.cs" Class="PROJECT_NAMESPACE.Ping" %>
public class Ping : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
context.Response.Write("Ping");
}
public bool IsReusable { get { return false; }}
}
Please try this example :-
<script language="javascript" type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<script language="javascript" type="text/javascript">
function KeepSession() {
// A request to server
$.post("http://servername:port/appName/SessionCheck.aspx");
//now schedule this process to happen in some time interval, in this example its 1 min
setInterval(KeepSession, 60000);
}
// First time call of function
KeepSession();
</script>
