It'll be slow to process on the server, then slow to load for the client. Bad idea. If you have that much stuff to load, make it multiple pages and maintain the data with session state. If not that, then I'd suggest making each "page" its' own panel (ditching a MultiView), and using JavaScript or some such to control the visibility of them, making them behave like you want. Panels are easy to render on the server, minimizing post-backs and getting rid of the MultiView will make the DOM markup smaller, which means it'll load faster, and JS will make the page respond much faster.