使用layui上传文件

    <div class="layui-upload">
        <label class="layui-form-label" style="width:110px;">批量导入:</label>
        <button type="button" class="layui-btn layui-btn-normal" id="test8">选择文件</button>
        <button type="button" class="layui-btn" id="test9">开始上传</button>
    </div>

　　<script type="text/javascript">
        layui.use('upload', function () {
            var $ = layui.jquery,upload = layui.upload;
            upload.render({
                elem: '#test8',
                url: '/UnbindMarking/upload',
                accept: 'file',
                acceptMime: 'application/vnd.ms-excel,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
                auto: false,
                bindAction: '#test9',
                done: function (res) {
                    console.log(res);
                },
                error: function (index, upload) {
                    console.log(index+upload);
                }
            });
        })
    </script>

　　　　public string upload()
        {
            HttpRequest request = System.Web.HttpContext.Current.Request;
            if (request.Files.Count == 0)
            {
                return "{\"result\":\"false\",\"msg\":\"上传的文件不能为空！\"}";
            }
            var file = request.Files[0];
            var filePath = System.Web.HttpContext.Current.Server.MapPath("~/Files/");
            if (!Directory.Exists(filePath))
            {
                Directory.CreateDirectory(filePath);
            }
            file.SaveAs(filePath + file.FileName);
            return "{\"result\":\"true\",\"msg\":\"文件上传成功！\"}";
        }