FileUpload.hasFile永远是假 [英] FileUpload.hasFile is always False

问题描述

我有一个文件上传控件（它不是内部的的UpdatePanel ）和 hasFile 属性始终是假。

I have a FileUpload control (and it's not inside an UpdatePanel) and its hasFile property is always False.

   <asp:FileUpload ID="certificateUploader" runat="server"/>

任何想法？

推荐答案

添加触发器为您的UpdatePanel

Add a trigger for your UpdatePanel

<Triggers>
   <asp:PostBackTrigger ControlID="btnCertificateUpload" />
</Triggers>

这将迫使回传被点击上传按钮时。

This will force a postback when the upload button is clicked.

此外，添加下面一行到Page_Load

Also add the line below to the Page_Load

Page.Form.Attributes.Add("enctype", "multipart/form-data");

这篇关于FileUpload.hasFile永远是假的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！