title: Can I avoid having an UpdatePanel that kills viewstate?
body: <p>I selection page that has a gridview that presents the user with a list of data items that they can click on to "drill into" - redirecting them to the data maintenance page.</p>
  
  <p>Because the list can get long, we have a series of check boxes and drop-down lists at the top that act as filters.</p>
  
  <p>We just implemented an UpdatePanel with an UpdatePanelAnimationExtender so that when the page made long trips back to the databse, they would get a nice "Processing..." pop up.</p>
  
  <p>Problem is, this seems to break the viewstate on the drop-down lists and check boxes.  Now, when they go to the 'detail page' and hit the BACK button to get back to the 'selection' page - the selected values in the checkboxes and drop-downlists are back to their initial defaults.  The lists are still populated, but they 'forgot' what they had when the user clicked to the data maintenance page.</p>
  
  <p>I took out the .aspx code for the UpdatePanel and the animation extended and retested and everything worked perfectly.  So, apparently, the UpdatePanel and/or the AnimationExtender doesn't play nice with the viewstate.</p>
  
  <p>Is there a way I can stop the UpdatePanel's actions from, in effect, zeroing out the '.SelectedValue" properties?</p>