ClientID & UniqueID
ClientID and UniqueID are definitely different. In the simplest sense, ClientID is used for client-side, UniqueID is used for server-side. However, there are more subtle differences between them. ClientID: Used with id attribute of rendered HTML tag Uses underscore as separator (e.g. ParentPanel_ChildControl) MSDN ClientID reference <%=%>, combined with $get or $find, can be used … Continued