jquery用户界面对话框没有为我打开

HTML:

<button type="button" class="btn btn-success" style="margin-bottom:14px" id="btnAdd" onclick="modaladdedit('URLToMyController')"><i class="fa fa-plus"> Add New</i></button>

头号标签:

<link rel="stylesheet" href="/Content/themes/base/jquery-ui.min.css" />            
<script src="/Scripts/jquery-3.3.1.js"></script>
<script src="/Scripts/bootstrap.min.js"></script>
<link rel="stylesheet" href="/Content/bootstrap.min.css">
<link rel="stylesheet" href="/Content/font-awesome.min.css">
<link rel="stylesheet" href="/Content/ionicons.min.css">
<link rel="stylesheet" href="/admin-lte/css/AdminLTE.min.css">
<link rel="stylesheet" href="/admin-lte/css/skins/skin-black-light.min.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600,700,300italic,400italic,600italic">        
<link href="/Content/jquery.dataTables.min.css" rel="stylesheet"/>
<link href="/Content/datatablefooteredit.css" rel="stylesheet"/>
<script src="/Scripts/jquery-ui-1.12.1.min.js"></script>
<script src="/Scripts/jquery.dataTables.min.js"></script>
<script src="/Scripts/dataTables.bootstrap.min.js"></script>

后 </body> :

<script src="/Scripts/jquery.slimscroll.min.js"></script>
<script src="/Scripts/fastclick.js"></script>
<script src="/admin-lte/js/adminlte.min.js"></script>
<script src="/admin-lte/js/demo.js"></script>

后脚本 </身体& :

$(document).ready(function () {
    $('.sidebar-menu').tree()
});

 var Popup, table;
 $(document).ready(function () {
// Some code here...
});

// Popup Modal Window
        function modaladdedit(url){            
            var formDiv= $('</div>');    
            $.get(url)
            .done(function(response){
                  formDiv.html(response);    
                  Popup= formDiv.dialog({
                    autoOpen: true,
                    resizable: false,
                    position: 'center',
                    modal: true,
                    title: 'Add/Edit Email Data',
                    height: 500,
                    width: 600,
                    close: function (){
                                Popup.dialog('destroy').remove();
                            }
                 });                    
            });

当我点击按钮时,对话框窗口不会弹出,控制台也不会出现任何错误。 我什么都试过了,什么都没用。我尝试更改CSS和JS文件的顺序,但没有真正起作用。 任何帮助都将不胜感激。

谢谢您!