文件从文件上传控制中丢失 [英] File getting lost from fileupload control

问题描述

你好，

我有一个使用文件上传控件的asp.net表单.我选择要上传的文件，但是每次单击任何导致回发的复选框，按钮时，所选文件都会从文件上传控件中丢失/删除.每次选中复选框或回发后，我都必须从fileuploader中重新选择文件.请帮助我摆脱这个问题.

谢谢，
问候，
gauri

解决方案

看看维护回发中的文件上传控制

Hello,

I have a asp.net form on which i am using fileupload control. I choose a file to be uploaded but each time if i click on any check box,button which causes postback, the chosen file gets lost/removed from the fileupload control.Every time after checking check box or postback i have to reselect file from fileuploader. Please help me to get rid of this problem.

thankyou,
regards,
gauri

解决方案

Have a look at This[^]

hope it helps :)

When there is a postback I think it takes the existing file path as a preload and takes it off.For security reasons, you cannot pre-load the name of a file into the FileUpload control.

Following link will provide the solution.
Maintain File Upload Control on Postbacks

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