AJAX POST无法使用jQuery 1.9.0或更高版本

Question

以下是我在ASPX端使用AJAX调用静态web方法的以下代码。它曾经与 jQuery 1.2.0 一起使用，但我需要更新我的 jQuery 2.1.1 ，现在ajax代码甚至不执行，因为代码永远不会属于＆＃39;失败＆＃39;节

请问有人向我推进正确的方向吗？我有一种感觉，我可能会跳过使用较新版本jQuery的引用？

            <%@ Register Assembly="System.Web.Ajax" Namespace="System.Web.UI" TagPrefix="asp" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
    <link href="../Design/jQueryCSS/bootstrap-select.css" rel="Stylesheet" type="text/css" />
    <script type="text/javascript" src="../Design/scripts/jquery-2.1.1.js"></script>
    <script  type="text/javascript" src="../Design/scripts/bootstrap-select.js"></script>
    <script type="text/javascript" src="../Design/scripts/bootstrap.js"></script>
    <link href="../Design/jQueryCSS/bootstrap.css" rel="Stylesheet" type="text/css" />
    <script src="../Design/scripts/jquery.columnfilters.js" type="text/javascript"></script>
    <script type="text/javascript" src="../Design/scripts/ToolBox.js"></script>


        <script type="text/javascript">
        $(document).ready(function () {
        var rtID = $('#<%=ddlRequestType.ClientID%>');
        //console.log(rtID[0].value);
        var temp = searchFields(rtID[0].value);
        console.log(temp);

        });

    function searchFields(rtID) {

        $.ajax({
            type: "POST",
            url: "Reports.aspx/Search",
            data: JSON.stringify({requestTypeID: rtID}),
            //data: 'requestTypeID: "' + rtID + '" }',
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (response) {
                /*if (response.d == true) {
                    console.log(response.data);
                }*/
                alert("hi");
            },
            failure: function (response) {
                console.log(response.data);
            }
        });
 </script>

错误：

是的，我确认了requestTypeID值： - ）

Answer 1

尝试发送JSON对象而不是String：

$.ajax({
        type: "POST",
        url: "Reports.aspx/Search",
        data: {requestTypeID: rtID}, //Here
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (response) {
            /*if (response.d == true) {
                console.log(response.data);
            }*/
            alert("hi");
        },
        failure: function (response) {
            console.log(response.data);
        }
    });