Home » ASP.NET » How to expand CollapsiblePanelExtender in code behind? How to expand CollapsiblePanelExtender in code behind? CollapsiblePanelExtender1.ClientState = "false"; CollapsiblePanelExtender1.Collapsed = false; Posted on Monday, March 10, 2008 by Viktar Karpach | Comments (5) | Add Comment Comments Re:How to expand CollapsiblePanelExtender in code behind? Hai Posted on 7/25/2008 12:38:33 AM by Mohan # Re:How to expand CollapsiblePanelExtender in code behind? Thank you Posted on 3/1/2010 1:19:56 PM by skm # Re:How to expand CollapsiblePanelExtender in code behind? Me.CollapsiblePanelExtender1.Collapsed = True Me.CollapsiblePanelExtender1.ClientState = "True" Posted on 6/9/2010 12:44:48 PM by badre # Re:How to expand CollapsiblePanelExtender in code behind? thanks.it worked prompt. Posted on 7/1/2010 3:10:10 AM by Deepan # Re:How to expand CollapsiblePanelExtender in code behind? Show!!!Thanx Posted on 12/16/2011 5:52:09 AM by Lourenço - Brazil # New Comment Your Name: Email (for internal use only): Comment: Code above: