I am wondering if there is any way to iterate through all the controls created by Ajax call using server code. I need to go through them and add attributes to those controls.
My suggestion is to use ArrayList/HashTable or other collection/dictionary to store the ids of the initiator and updated controls valid for a particular ajax manager setting. This can be done intercepting the AjaxSettingCreated event of RadAjaxManager.
Thus later, inside the corresponding event handler, you will be able to determine the updated controls for a given ajax setting and perform some custom operation over this set of controls only.
For your further convenience I am attaching a sample web site which illustrates the approach.