Easy way to AJAX WebControls
"I've got a web application that I'm trying to optimize. Some of the controls are hidden in dialog-style DIVs. So, I'd like to have them load in via AJAX only when the user wants to see them. This is fine for controls that are mostly literal-based (various menus and widgets), but when I have what I call ""dirty"" controls - ones that write extensive information to the ViewState, put tons of CSS or script on the page, require lots of references, etc - these are seemingly impossible to move ""out of page"", especially considering how ASP.NET will react on postback.
I was considering some kind of step where I override Render, find markers for the bits I want to move out and put AJAX placeholders in there, but not only does the server overhead seem extreme, it also feels like a complete hack. Besides, the key element here is the dialog boxes that contain forms with validation controls on them, and I can't imagine how I would move the controls and their required scripts.
In my fevered imagination, I want to do this:
Sadly, I know this is a dream.
How close can I really get to a quick-and-easy AJAXification without causing too much load on the server?"