關窗 onbeforeunload 關掉 ajax async 偷 post

[rusli]

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        $.ajaxSetup({ async: false });
        window.onbeforeunload = null;
        window.onbeforeunload = function (e) {
            if (!e) e = window.event;

            $.get('@Url.Action("CancelProcess", "Excel")');

            //e.cancelBubble is supported by IE - this will kill the bubbling process.
            e.cancelBubble = true;

            //e.stopPropagation works only in Firefox.
            if (e.stopPropagation) {
                e.stopPropagation();
                e.preventDefault();
            }
        };