このプラグイン ( http://plugins.krajee.com/file-input ) を基本的なファイルのアップロードに使用していますが、設計に関して頭痛の種になっています。何が悪いのかわからない。必要なすべての js および css ファイルがあるようです。
<link href="/Content/themes/base/jquery-ui.css" rel="stylesheet"/>
<link href="/Content/bootstrap.css" rel="stylesheet"/>
<link href="/Content/themes/base/accordion.css" rel="stylesheet"/>
<link href="/Content/themes/base/all.css" rel="stylesheet"/>
<link href="/Content/themes/base/autocomplete.css" rel="stylesheet"/>
<link href="/Content/themes/base/base.css" rel="stylesheet"/>
<link href="/Content/themes/base/button.css" rel="stylesheet"/>
<link href="/Content/themes/base/core.css" rel="stylesheet"/>
<link href="/Content/themes/base/datepicker.css" rel="stylesheet"/>
<link href="/Content/themes/base/dialog.css" rel="stylesheet"/>
<link href="/Content/themes/base/draggable.css" rel="stylesheet"/>
<link href="/Content/themes/base/menu.css" rel="stylesheet"/>
<link href="/Content/themes/base/progressbar.css" rel="stylesheet"/>
<link href="/Content/themes/base/resizable.css" rel="stylesheet"/>
<link href="/Content/themes/base/selectable.css" rel="stylesheet"/>
<link href="/Content/themes/base/selectmenu.css" rel="stylesheet"/>
<link href="/Content/themes/base/slider.css" rel="stylesheet"/>
<link href="/Content/themes/base/sortable.css" rel="stylesheet"/>
<link href="/Content/themes/base/spinner.css" rel="stylesheet"/>
<link href="/Content/themes/base/tabs.css" rel="stylesheet"/>
<link href="/Content/themes/base/theme.css" rel="stylesheet"/>
<link href="/Content/themes/base/tooltip.css" rel="stylesheet"/>
<link href="/Content/site.css" rel="stylesheet"/>
<script src="/Scripts/modernizr-2.6.2.js"></script>
<script src="/Scripts/jquery-2.1.4.js"></script>
<script src="/Scripts/jquery-ui-1.12.1.js"></script>
<script src="/Scripts/cldr.js"></script>
<script src="/Scripts/cldr/event.js"></script>
<script src="/Scripts/cldr/supplemental.js"></script>
<script src="/Scripts/cldr/unresolved.js"></script>
<script src="/Scripts/globalize.js"></script>
<script src="/Scripts/globalize/message.js"></script>
<script src="/Scripts/globalize/number.js"></script>
<script src="/Scripts/globalize/plural.js"></script>
<script src="/Scripts/globalize/date.js"></script>
<script src="/Scripts/globalize/currency.js"></script>
<script src="/Scripts/globalize/relative-time.js"></script>
<script src="/Scripts/globalize/unit.js"></script>
<script src="/Scripts/bootbox.js"></script>
<script src="/Content/bootstrap-fileinput/css/fileinput.min.css"></script>
<script src="/Content/bootstrap-fileinput/themes/gly/theme.js"></script>
<script src="/Scripts/plugins/canvas-to-blob.min.js"></script>
<script src="/Scripts/plugins/purify.min.js"></script>
<script src="/Scripts/fileinput.min.js"></script>
<script src="/Scripts/plugins/sortable.min.js"></script>