nside the update panel i placed lot of panel.
now i want to show the panel ., please give me a solutuion.,
Panel is a server side control that can be accessed directly on server side using it's ID.
Thus for:
<asp:Panel ID="Panel1" runat="server">
Do:
Panel1.Visible = true;
Panel1.Visible = false;
To add on - it does not matter if it is in or out of Update Panel. Update panel is just a region defined for partial update if needed.