The Situation: You have a DevExpress ASPxGridLookup control on your page and need to update its contents when some event occurs (such as a parent drop-down value changes). The problem is that the ASPxGridLookup control does not implement an OnCallback event. A Solution: First of all, this is not my solution. I found it on … Continue reading How To Perform a Callback on an ASPxGridLookup Control