This property contains the MIME Content Type of the file, which is useful in determining the contents of the file.

It has been our experience that Netscape Navigator version 4 returns creative and diverse Content Types, depending on the file being uploaded. Internet Explorer typically returns the lowest common denominator, which is "application/octet-stream".

If there is more than one file being uploaded in a single page, only the first one will be displayed.

To examine the Content Type of multiple files in a single upload, there is an equivalent property for each file object, i.e., fileUpload.Form("File1").ContentType.