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我在我的 asp.net 网站中使用 jquery。它在我的本地系统中运行良好。但是当我在服务器上发布它时它不起作用。我的jQuery代码如下，

    $("#<%=btnSubmit.ClientID %>").click(function (ev) {
    ev.preventDefault();
    $(this).attr("disabled", true);
    if ($("#<%=ddlLetterType.ClientID %>").val() == "-1") {
        alert("Please select a letter.");
        $("#<%=ddlLetterType.ClientID %>").focus();
        $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
        return false;
    } else if ($("#<%=ddlLetterType.ClientID %>").val() == "1") {
        if ($("#<%=ddlEmbassyCountry.ClientID %>").val() == "-1") {
            alert("Please select an Embassy Country.");
            $("#<%=ddlEmbassyCountry.ClientID %>").focus();
            $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
            return false;
        } else if ($("#<%=ddlTravelCountry.ClientID %>").val() == "-1") {
            alert("Please select a Travel Country.");
            $("#<%=ddlTravelCountry.ClientID %>").focus();
            $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
            return false;
        } else if ($("#<%=txtEmbassyAddress.ClientID %>").val() == "") {
            alert("Please enter embassy address.");
            $("#<%=txtEmbassyAddress.ClientID %>").focus();
            $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
            return false;
        } else if ($("#<%=txtPassportNo.ClientID %>").val() == "") {
            alert("Please enter passport no.");
            $("#<%=txtPassportNo.ClientID %>").focus();
            $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
            return false;
        } else if ($("#<%=txtPlaceOfMeeting.ClientID %>").val() == "") {
            alert("Please enter place of meeting.");
            $("#<%=txtPlaceOfMeeting.ClientID %>").focus();
            $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
            return false;
        } else if ($("#<%=txtStartDate.ClientID %>").val() == "") {
            alert("Please enter start date.");
            $("#<%=txtStartDate.ClientID %>").focus();
            $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
            return false;
        } else if ($("#<%=txtEndDate.ClientID %>").val() == "") {
            alert("Please enter end date.");
            $("#<%=txtEndDate.ClientID %>").focus();
            $("#<%=btnSubmit.ClientID %>").attr("disabled", false);
            return false;
        } else {
            var parameter = {
                request_no: $("#<%=lblRequestNo.ClientID %>").text(),
                initiator_user_id: $("#<%=hInitiatorUserId.ClientID %>").val(),
                initiatingDate: $("#<%=lblRequestdate.ClientID %>").text(),
                embassy_country_id: $("#<%=ddlEmbassyCountry.ClientID %>").val(),
                embassy_address: $("#<%=txtEmbassyAddress.ClientID %>").val(),
                nationality: $("#<%=lblNationality.ClientID %>").text(),
                passport_no: $("#<%=txtPassportNo.ClientID %>").val(),
                company: $("#<%=lblCompanyName.ClientID %>").text(),
                designation: $("#<%=lblDesignation.ClientID %>").text(),
                joining_date: $("#<%=lblJoiningDate.ClientID %>").text(),
                travel_country_id: $("#<%=ddlTravelCountry.ClientID %>").val(),
                place_of_meeting: $("#<%=txtPlaceOfMeeting.ClientID %>").val(),
                travel_start_date: $("#<%=txtStartDate.ClientID %>").val(),
                travel_end_date: $("#<%=txtEndDate.ClientID %>").val(),
                letter_filename: $("#<%=lblRequestNo.ClientID %>").text() + "_business_letter",
                status: '2',
                hr_letter_type_id: $("#<%=ddlLetterType.ClientID %>").val()
            };
            $.ajax({
                type: "POST",
                url: "<%=ResolveUrl("~/HRLetterService.asmx") %>/RegisterHRLetterBusinessData",
                data: JSON.stringify(parameter),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) {
                    __doPostBack('<%=btnSubmit.ClientID.Replace("_", "$") %>', '');
                },
                error: function (msg) {
                    alert("Error in saving the request. Please contact your administrator by sending the screen shot to unify.admin@unilever.com");
                    $(this).attr("disabled", false);
                    return false;
                }
            });
        }
        }
.
.
.
.

我没有发布所有代码，因为代码很好并且没有错误。但唯一的问题是 if 语句。if 和 else if 语句被执行，但 else 部分没有被执行。可能是什么问题？请你帮助我好吗？提前致谢。

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1 回答 1

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您的代码未包含在ready事件回调中。如果您的代码按原样放置在 head 中，它将在 html 存在之前触发，并且永远不会绑定到它正在寻找的元素，因为它们还不存在。

   $(function(){ // shorthand for $(document).ready(){

       /* html exists, run your code here*/

   })

如果这不能解决问题，请使用浏览器控制台检查抛出的错误

于 2012-06-23T05:09:56.953 回答