I now have a version of this user control functioning in a C# master page scenario. Hope that this helps someone out...
LogoutTimer.ascx.cs
LogoutTimer.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="LogoutTimer.ascx.cs" Inherits="LogoutTimer" %>
<%@ Register Namespace="Telerik.Web.UI" TagPrefix="telerik" Assembly="Telerik.Web.UI" %>
<script type="text/javascript">
function sm_timer(sessionLength, redirectUrl) {
var timeleft = sessionLength;
var prm = Sys.WebForms.PageRequestManager.getInstance();
if (prm != null) {
prm.add_endRequest(function () {
timeleft = sessionLength;
});
}
var modalVisible = false;
var displayElements = $('.sm_logoutTimer');
function updateDisplay() {
if (displayElements != null) {
var m = Math.floor(timeleft / 60);
var s = timeleft % 60;
document.getElementById("sm_logoutTimer").innerHTML = m.toString() + ':' + (s <= 9 ? '0' : '') + s.toString()
}
}
function logout_callback(arg) {
$.get(location.href);
modalVisible = false;
timeleft = sessionLength;
}
function checkPrompt() {
if (timeleft <= 120 && !modalVisible) {
modalVisible = true;
radconfirm('', logout_callback, 280, 140);
displayElements = $('u');
}
}
function logout() {
document.location.href = redirectUrl;
}
function tick() {
if (timeleft <= 0) {
logout();
} else {
updateDisplay();
checkPrompt();
setTimeout(tick, 1000);
}
timeleft--;
}
setTimeout(tick, 1000);
}
</script>
<telerik:RadWindowManager runat="server" ID="windowManager" Behaviors="Move" Style="z-index: 200001">
<AlertTemplate>
</AlertTemplate>
<PromptTemplate>
</PromptTemplate>
<ConfirmTemplate>
<div class="rwDialogPopup radconfirm">
<div class="rwDialogText">
You will be logged out due to inactivity soon.<br />
Time until logged out:
<div id="sm_logoutTimer">
</div>
</div>
<div>
<a onclick="$find('{0}').close(true);" class="rwPopupButton" href="javascript:void(0);"><span class="rwOuterSpan"><span class="rwInnerSpan">Stay Logged In</span></span></a>
</div>
</div>
</ConfirmTemplate>
</telerik:RadWindowManager>
On the master page include the following: