Layui upload多图片上传， 传参后台接受不到

Layui upload动态传参，后台接收不到，解决方法

这里参数动态($(#).val())拿去不到，除非写死，必须要用before从新赋值

 layui.config({
        base: '/Assets/layui/' //静态资源所在路径
    }).extend({
        index: 'lib/index' //主入口模块
    }).use(['index', 'upload'], function () {
        var $ = layui.jquery
            , upload = layui.upload;

        var Title;
        var KeyWork;
        var Description;
        var PicImage_Id;

         
        //多文件列表示例
        var demoListView = $('#test-upload-demoList')
            , uploadListIns = upload.render({
                elem: '#test-upload-testList'
                , url: '/FileUpload'
                , data: { PicImage_Id:$("#Id").val(),Title: Title, KeyWork: KeyWork,Description:Description }    //额外传输的参数, 这里参数动态($(#).val())拿去不到，除非写死，必须要用before从新赋值
                , accept: 'file'
                , multiple: true
                , auto: false
                , bindAction: '#test-upload-testListAction'
                , choose: function (obj) {
                    var files = this.files = obj.pushFile(); //将每次选择的文件追加到文件队列
                    //读取本地文件
                    obj.preview(function (index, file, result) {
                        var tr = $(['<tr id="upload-' + index + '">'
                            , '<td>' + file.name + '</td>'
                            , '<td>' + (file.size / 1014).toFixed(1) + 'kb</td>'
                            , '<td>等待上传</td>'
                            , '<td>'
                            , '<button class="layui-btn layui-btn-mini test-upload-demo-reload layui-hide">重传</button>'
                            , '<button class="layui-btn layui-btn-mini layui-btn-danger test-upload-demo-delete">删除</button>'
                            , '</td>'
                            , '</tr>'].join(''));

                        //单个重传
                        tr.find('.test-upload-demo-reload').on('click', function () {
                            obj.upload(index, file);
                        });

                        //删除
                        tr.find('.test-upload-demo-delete').on('click', function () {
                            delete files[index]; //删除对应的文件
                            tr.remove();
                            uploadListIns.config.elem.next()[0].value = ''; //清空 input file 值，以免删除后出现同名文件不可选
                        });

                        demoListView.append(tr);
                    });
                }, before: function (obj) {
                    this.data.Title = $("#Title").val();
                    this.data.KeyWork = $("#KeyWork").val();
                    this.data.Description = $("#Description").val();
                   
                }
                , done: function (res, index, upload) {
                    debugger;
                    if (res.code == 200) { //上传成功
                        var tr = demoListView.find('tr#upload-' + index),
                            tds = tr.children();
                        tds.eq(2).html('<span style="color: #5FB878;">上传成功</span>');
                        tds.eq(3).html(''); //清空操作
                        return delete this.files[index]; //删除文件队列已经上传成功的文件
                    }
                    this.error(index, upload);
                }
                , error: function (index, upload) {
                    debugger;
                    var tr = demoListView.find('tr#upload-' + index)
                        , tds = tr.children();
                    tds.eq(2).html('<span style="color: #FF5722;">上传失败</span>');
                    tds.eq(3).find('.test-upload-demo-reload').removeClass('layui-hide'); //显示重传
                }
            });
    });

 暂时就找到这样解决，如你有更好方法，欢迎留言交流。