Why doesn't the pop up close when opened from inside an UpdatePanel

问题

JQuery (inside the head function in my webform):

function DoThisEM() {
    centerPopupEM();
    loadPopupEM();
}

function DoThatEM() {
    disablePopupEM();
}
var popupStatusEM = 0;
//loading popup with jQuery magic!
function loadPopupEM() {
    //loads popup only if it is disabled
    if (popupStatusEM == 0) {
        $("#backgroundPopupEM").css({
            "opacity": "0.7"
        });
        $("#backgroundPopupEM").fadeIn("slow");
        $("#popupContactEM").fadeIn("slow");
        popupStatusEM = 1;
    }
}
//disabling popup with jQuery magic!
function disablePopupEM() {
    //disables popup only if it is enabled
    if (popupStatusEM == 1) {
        $("#backgroundPopupEM").fadeOut("slow");
        $("#popupContactEM").fadeOut("slow");
        popupStatusEM = 0;
    }
}
//centering popup
function centerPopupEM() {
    //request data for centering
    var windowWidth = document.documentElement.clientWidth;
    var windowHeight = document.documentElement.clientHeight;
    var popupHeight = $("#popupContactEM").height();
    var popupWidth = $("#popupContactEM").width();
    //centering
    $("#popupContactEM").css({
        "position": "absolute",
        "top": windowHeight / 2 - popupHeight / 2,
        "left": windowWidth / 2 - popupWidth / 2
    });
    //only need force for IE6

    $("#backgroundPopupEM").css({
        "height": windowHeight
    });
}

$("body").on('click', "#popupContactCloseEM", function (e) {
    //e.preventDefault();
    alert('popupContactCloseEM');
    disablePopupEM();
});
$("body").on('click', "#backgroundPopupEM", function (e) {
    //e.preventDefault();
    alert('backgroundPopupEM');
    disablePopupEM();
});

GridView:

Popup (when clicked on any of the edit icon:

I am not sure why but when I click on the x or the background around the popup, the disablePopupEM function is not called to close it. I even added a test alert and I am not seeing that either.

Please help me resolve the issue.

回答1:

For me that sounds very similar to this: You assign click handlers to elements which do not yet exist because the DOM did not finish loading yet (e.g. the JavaScript is initialized before your HTML).

I would try to attach the click handlers inside the $(document).ready() funtion, which will be called once the DOM is fully loaded - then the elements are available and they will be attached with your handler.

$(document).ready(function() {
    $("body").on('click', "#popupContactCloseEM", function (e) {
        //e.preventDefault();
        alert('popupContactCloseEM');
        disablePopupEM();
    });
    $("body").on('click', "#backgroundPopupEM", function (e) {
        //e.preventDefault();
        alert('backgroundPopupEM');
        disablePopupEM();
    });
});

As you see, you only need to surround it by that ready function.

来源：https://stackoverflow.com/questions/28908376/why-doesnt-the-pop-up-close-when-opened-from-inside-an-updatepanel

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