Hi,

You can set the uploader's AllowedExtension to filter the file type so that user won't be able to upload files that you do not want.

The uploader does not perform any kind of checking on the files, it does provide you the necessary support so that you can perform whatever kind of checking you would want though. You can handle the uploader's FileUploaded event and then perform any checking you wish to do there. If the file looks OK, then you can "take" it by adding your DB record, moving it to somewhere else; or if the file doesn't look OK, you would simply reject it by deleting it.

Your "crude" workaround works for wave file but may not work for mp3 or aac. Those are sophistically compressed files. When those files are compressed, there is a "target bit rate" setting but the actual bit rate varies. In order to precisely validate those files, you can take a look of DirectX filters. DirectX has a managed interface so it is not very difficult to use. Obviously those are far out the scope of the uploader so it is not able to include such functionalities.

On the other hand, wave file is very simple. You can find plenty of source code on the Internet to read the wave file header to get the sample rate, format, etc.

Thanks