asp.net 2.0 restore entire viewstate

I'm maintaining a legacy ASP.Net 2.0 webforms applica开发者_开发百科tion, I'll spare the details to avoid complicating the question. I just want to ask if anyone knows of a way to efficiently restore an entire viewstate. I can provide more details if necessary, but I'm hoping for something general. I was hoping I could use the Page.LoadPageStateFromPersistenceMedium(), but that appears to be a protected method. Some reading on MSDN seems to indicate I have to use a custom class that inherits from the PageStatePersister Class and use it's methods to restore an entire state. Just wanted to get some input from more experienced developers. Thanks.

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there are different approaches for this, we used it once in the past for .NET 2 and worked well.

web.config:

<configuration>
   <system.web>
    <pages pageBaseType="PagePersisterBasePage" />
   </system.web>
</configuration>

page:

public class PagePersisterBasePage : Page
{
    public PagePersisterBasePage()   {
    }
    protected override PageStatePersister PageStatePersister {
        get {
            return new SessionPageStatePersister(this);
        }
    }
} 

just as an example, for full article, worth reading it all, go here: ASP.NET 2.0 Page State Persister

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Good article here: http://www.codeproject.com/Articles/7655/Persisting-the-state-of-a-web-page

This restores the ViewState, resets all controls and talks about restoring request.form()