How to update bit column of database true or false base of timer.

You could find this problem solved in the source code of my next article: MVC Basic Site: Step 4 – jqGrid Integration in MVC 4.0 using AJAX, JSON, jQuery, LINQ, and Serialization[^]

You should look on the next parts:

1. In AccountController the method OnWindowClosing() that is invoked from onBeforeUnload and onKeyDown window events, and used to do user session finalization tasks when the browser window is closing.

2.In the main layout view _Layout.cshtml the javscript section from the bottom of the file:

function onWindowClosing() {
            if (window.event.clientX < 0 || window.event.clientY < 0) {
                $.ajax({
                    type: "POST",
                    url: "/Account/OnWindowClosing"
                });
            }
        };

        function onKeydown(evt) {
            if (evt != undefined && evt.altKey && evt.keyCode == 115) //Alt + F4 
            {
                $.ajax({
                    type: "POST",
                    url: "/Account/OnWindowClosing"
                });
            }
        };

        window.onbeforeunload = onWindowClosing;
        window.document.onkeydown = onKeydown;