layui文件上传需要编写动态URL的时候需要重载方法

var uploadInst = upload.render({
            elem: '#WebButton'
            /* , url: url //此处配置你自己的上传接口即可*/
            , auto: true
            , accept: 'file'
            //,multiple: true
           // , bindAction: '#test9'
            , done: function (res) {
                layer.msg(res.msg);
                console.log(res)
            }
        });
       let url ;
        btn.addEventListener('click', function () {
            let select = document.querySelector('#WebSelect');
            url = '/Home/Contraband?id=' + select.value + '';
            //重载文件上传url
            uploadInst.reload({
                url: url
            });
        });