AJAX Control Toolkit AsyncFileUpload control

I was using AJAX Control Toolkit AsyncFileUpload control just now and hit an error "The file attached is invalid".

Fortunately, the error was easy to solve, just needed to add the following attribute
on the Async Upload Control

clientIdMode="AutoID"

Got the tip from the link below ^_^
ASP Net Forums

Using AJAX Control Toolkit

I wanted to use the AJAX Control Toolkit ComboBox in one of my webforms today.

This link is useful if you don't know how to add the AJAX Control Toolkit to your normal ASP.NET toolbox.


This link is useful if you want a 10 second guide on inserting a combo box.