winforms - How to create customized open file dialog in C#

Question

How can one create a user control that has the same functionality (along with some extended features) of OpenFileDialog in C#? I've followed this, but I could not find a solution for my problem.

My requirement is to add an extra button in the dialog. If that button gets clicked then the parent should be notified in the same manner as the ok and cancel buttons do.

Answer 1

The OpenFileDialog is a sealed class, and as such can't be inherited or extended. Your best bet would be to write your own open file dialog.

On the other hand, the FileDialog class isn't sealed, so you could inherit from that and make the necessary customizations. See http://www.codeproject.com/KB/dialog/OpenFileDialogEx.aspx for more information