ASP.NET - Limit file upload available file types

Question

I have added a file upload to my asp.net website. However, I want to limit the file types that user can select. For example, I only the user to select mp3 files. How can I a

Answer 1

As stated above, it's not possible out of the box.

The simpler solution that I've found: use a RegularExpressionValidator to check the file extension. No need for JavaScript or external libraries. Of course, it only checks the extension, not the file content (you must use server-side code and inspect the bytes), and does not change anything to the file list displayed in the folder browser.