asp.net – 通过Button控制Fire AsyncFileUpload

我使用ASP.NET AJAX工具包中的AsyncfileUpload并通过JQuery隐藏它.并在其旁边放置一个按钮.甚至当我单击此按钮并选择一个文件我想要触发AsycnFileUpload并上传文件.

我编写了大部分代码,但是当我选择文件时出现Javascript错误.

(错误：访问被拒绝;

PLACE：setTimeout(function(){
????????????????????????mainForm.submit(); //这里错误;
????????????????????????uploader._waitTimer = setTimeout(function(){uploader._wait()},100);
????????????????????},0);

<asp:Button ID="btnFileUpload" runat="server" Text="Add" onclientclick="FileUploadClick(); return false;"/>
<ajaxToolkit:AsyncFileUpload  runat="server" ID="AsyncFileUpload1" Width="400px" UploaderStyle="Modern" UploadingBackColor="#CCFFFF"/>

这是我的Javascript(我看到了控件生成的标记,并获得了文件输入
通过附加“_ct102”键入

function FileUploadClick() {
            var fileUploadControl = document.getElementById('<%= AsyncFileUpload1.ClientID %>' + '_ctl02')
            fileUploadControl.click();
            //fileUploadControl.setActive();                
        }