自动完成功能无法正常工作jQuery

Question

我有一个文本框，当用户键入至少2个字符时，该文本框需要自动完成，但是，它根本无法正常工作。我在另一种形式中具有几乎完全相同的代码，并且工作正常。任何输入将不胜感激！我没有发布C＃，因为如您所见，我在console.log列表中确保ajax发布成功（成功）。此外，jquery和jquery-ui脚本在此应用程序的主页中声明。

var shipTo = $('#txtShipTo')
var shipFrom = $('#txtShipFrom')
var addressList = []

$(document).ready(function () {
    $.ajax({
        type: 'POST',
        url: 'Shipping.aspx/fillList',
        contentType: 'application/json; charset=utf-8',
        success: function (r) {
            $.each(r.d, function (index, value) {
                addressList.push(value)
            })
            console.log(addressList)
        },
        error: function (result) {
            alert("Fail")
        }
    })
})

shipFrom.autocomplete({
    minLength: 2,
    source: addressList,
})

<%@ Page Title="Shipping Request" Language="C#" MasterPageFile="~/Base.master" AutoEventWireup="true" CodeFile="Shipping.aspx.cs" Inherits="Shipping" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
    <link href="StyleSheet1.css" rel="stylesheet" />
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <div class="container" id="fromContainer">
        <div class="row">
            <div class="col-lg-5 col" id="shipFromDiv">
                <label for = "txtShipFrom">Shipped From</label>
                <asp:TextBox ID="txtShipFrom" runat="server" class="form-control" placeholder="Begin typing..." aria-label=""></asp:TextBox>
                <label for = "txtAddress1">Address 1</label>
                <asp:TextBox ID="txtAddress1" runat="server" class="form-control" disabled></asp:TextBox>
                <label for = "txtAddress2">Address 2</label>
                <asp:TextBox ID="txtAddress2" runat="server" class="form-control" disabled></asp:TextBox>
                <div class="row">
                    <div class="col-lg-6 col-5">
                        <label for = "txtCity">City</label>
                        <asp:TextBox ID="txtCity" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                    <div class="col-lg-2 col-3">
                        <label for = "txtState">State</label>
                        <asp:TextBox ID="txtState" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                    <div class="col-lg-4 col-4">
                        <label for = "txtZip">Zip</label>
                        <asp:TextBox ID="txtZip" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                </div>
                <div class="row">
                    <div class="col-lg-8 col">
                        <label for = "txtCountry">Country</label>
                        <asp:TextBox ID="txtCountry" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                    <div class="col-lg-4 col">
                        <label for = "txtCode">Code</label>
                        <asp:TextBox ID="txtCode" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                </div>
            </div>
            <div class="col-lg-6 col" id="shipToDiv">
                <label for = "txtShipTo">Shipped To</label>
                <asp:TextBox ID="txtShipTo" runat="server" class="form-control" placeholder="Begin typing..."></asp:TextBox>
                <label for = "txtAddress3">Address 1</label>
                <asp:TextBox ID="txtAddress3" runat="server" class="form-control" disabled></asp:TextBox>
                <label for = "txtAddress4">Address 2</label>
                <asp:TextBox ID="txtAddress4" runat="server" class="form-control" disabled></asp:TextBox>
                <div class="row">
                    <div class="col-lg-6 col">
                        <label for = "txtCity">City</label>
                        <asp:TextBox ID="TextBox1" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                    <div class="col-lg-2 col">
                        <label for = "txtState">State</label>
                        <asp:TextBox ID="TextBox2" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                    <div class="col-lg-4 col">
                        <label for = "txtZip">Zip</label>
                        <asp:TextBox ID="TextBox3" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                </div>
                <div class="row">
                    <div class="col-lg-8 col">
                        <label for = "txtCountry">Country</label>
                        <asp:TextBox ID="TextBox4" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                    <div class="col-lg-4 col">
                        <label for = "txtCode">Code</label>
                        <asp:TextBox ID="TextBox5" runat="server" class="form-control" disabled></asp:TextBox>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <script src="JavaScript2.js"></script>
</asp:Content>