Filter File extension With FileUpload

Question

I am writing an asp.net web app which involves the use of the FileUpload control.

Right now, this particular FileUpload control only expects .z

Answer 1

It's possible on client-side! But, remember to do the server-side validation.

This two links show it: http://aspalliance.com/1614_Adding_Filter_Action_to_FileUpload_Control_of_ASPNET_20.all http://www.codeshode.com/2011/07/validate-file-extension-for-aspnet.html