Does viewstate expire?

Question

Let\'s say you have a aspx page that does not rely on session, but does rely on viewstate for persistance between postbacks.

If a user is accessing this page, and l

Answer 1

Sorry to relive this old thread, but new information is available now:

Yes, ViewStates expire. I come from 19 hours researching about a problem of ViewStates losing its values between long time interval postbacks. It took me a while reading MSDN documents and Stackoverflow answers saying it was basically impossible to happen unless a custom ViewState storage implementation was employed, which, now I know, it's not true.

My problem was taking place in a SharePoint 2013 environment. The service known as Distributed Cache (a.k.a. AppFabric) does the caching of the ViewState and has a Time to Live associated to it. You can find more information here: http://blogs.msdn.com/b/besidethepoint/archive/2013/03/27/appfabric-caching-and-sharepoint-1.aspx

The interesting bit of information can be found in this phrase: "To improve page performance, beginning in SharePoint 2013 SharePoint caches ViewState data server-side rather than transferring it back and forth to clients."

I hope this information helps somebody so desperate as I was 19 hours ago.