隐藏/显示的AsyncFileUpload控制不火服务器端UploadedComplete事件 [英] Hidden/Shown AsyncFileUpload Control Doesn't Fire Server-Side UploadedComplete Event

问题描述

我最近遇到的ASP.Net Ajax控件工具包的最新版本（3.0.40412）发布AsyncFileUpload控制来了。似乎有一个隐藏的控制程序是否使用它的时候透露，如＆LT是一个问题; DIV＆gt;在的visible = false 标记。

I recently came across the AsyncFileUpload control in the latest (3.0.40412) release of the ASP.Net Ajax Control Toolkit. There appears to be an issue when using it in a hidden control that is later revealed, such as a <div> tag with visible=false.

示例：

页code -

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="act" %>
.
.
.
<act:ToolkitScriptManager runat="server" ID="ScriptManager1" />
<asp:UpdatePanel runat="server" ID="upnlFileUpload">
    <ContentTemplate>
        <asp:Button runat="server" ID="btnShowUpload" Text="Show Upload" />
        <div runat="server" id="divUpload" visible="false">
            <act:AsyncFileUpload runat="server" id="ctlFileUpload" />
        </div>
    </ContentTemplate>
</asp:UpdatePanel>

服务器端code -

Server-side Code -

Protected Sub ctlFileUpload_UploadedComplete(ByVal sender As Object, ByVal e As AjaxControlToolkit.AsyncFileUploadEventArgs) Handles ctlFileUpload.UploadedComplete

End Sub

Protected Sub btnShowUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnShowUpload.Click
    divUpload.Visible = True
End Sub

我对UploadedComplete事件断点但它永远不会触发。但是，如果你把AsyncFileUpload控制输出的＆LT; D​​IV＆GT; ，使得它在初始页面可见呈现，控制工程如预期。

I have a breakpoint on the UploadedComplete event but it never fires. However, if you take the AsyncFileUpload control out of the <div>, making it visible at initial page render, the control works as expected.

所以，这是AsynchUploadControl中的一个bug，还是我没有把握的一个基本概念（这经常发生）？

So, is this a bug within the AsynchUploadControl, or am I not grasping a fundamental concept (which happens regularly)?

推荐答案

首先，确保你的标签具有以下attribuytes - ENCTYPE =的multipart / form-data的方法=后第二，你必须有一个可见的DIV内一种无形的DIV AsyncFileUpload。看到这两个线程。

First, make sure your tag has the following attribuytes - enctype="multipart/form-data" method="post" Secondly, you have to have the AsyncFileUpload in an invisible DIV within a visible DIV. See these two threads on it.

http://forums.asp.net/t/1489399.aspx

http://forums.asp.net/t/1479689.aspx？的PageIndex = 2

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