如何将控件异步添加到asp.net页？

Question

I'm looking to optimize pages within our application so they perform better. I want to dynamically add controls (Textbox, Button, Custom Control, etc) to a page using AJAX to minimize postbacks done. I'm looking for an alternative to using an UpdatePanel (nothing wrong with them, they're just not built for performance).

The trick though is that the ViewState will need to be updated with the new controls added, so I can't see WebServices or static Page Method calls fitting in well here.

Answer 1

Ajax calls cannot update viewstate as that is created in code behind.

Maybe if you manage to access the viewstate server side you could send it back in the ajax call and store it in the viewstate field but you risk loosing anything that was not touched in the callback, I have never delved that deep into viewstate.