在回发时将文本框控件中FileUpload的完整文件路径分配回FileUpload [英] Assign full file path of FileUpload in textbox control back to FileUpload on postback

问题描述

我在UpdatePanel中有一个FileUpload控件，当用户选择文件时，完整文件路径将存储在hiddenfield中，并且在回发期间，我想将hiddenfield中的完整文件路径分配回FileUpload控制文本框，有可能实现吗?

I have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?

推荐答案

这是不可能的，因为您无法为FileUpload控件分配文件路径.浏览器不允许这样做，因为这会带来安全风险.

That is not possible because you cannot assign a file path to the FileUpload control. Browsers don't allow that because it would be a security risk.

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