使用jQuery在UpdatePanel中开始和结束请求

with(Sys.WebForms.PageRequestManager.getInstance()  ) {
       add_beginRequest(onBeginRequest);
       add_endRequest(onEndRequest);
}

function onBeginRequest(sender, args) {
       $.blockUI();
}

function onEndRequest(sender, args) {

        $(document).ready(function () {
            // Put your code here
        });

        var prm = Sys.WebForms.PageRequestManager.getInstance();
        prm.add_endRequest(function () {
           // Put your code here
        });

        prm.add_beginRequest(function () {
           // Put your code here
        });