For a slick UI, I am deciding between using a client side library (JQuery or ExtJS) or go with the AJAX Control toolkit. I understand that the widgets supported by ExtJS rich library does not match what’s there in the toolkit.
What are the pros of cons of using one over the other?
I’d choose AJAX Control Tool Kit + PageMethods (avoid UpdatePanel, it’s easy to use at the beginning but it can be a real nightmare ) + JQuery to parse/display the result of the page methods.
PageMethods are really easy to use.
But do not use ajax control toolkit ‘s controls, it’s easy to do the basic stuff , but when you want to be more specific, you’re fighting against the toolkit (sometime you have bug with IE but not with FF it’s really fun).