ASP.NET File Uploader with Overwrite Message

This ASP.NET application is a file uploader dialog box that can be called from classic ASP. It is designed for use in an intranet site. The file uploader displays an overwrite warning as a popup or a warning message. The overwritten file is archived with a time stamp appended to the filename. Checking if the file already exists turned out to be the biggest obstacle. The FileExists Java function uses an ActiveX control that causes browser security warnings. The workaround was to access a code-behind routine by calling AJAX Web Services.





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