Present items in a hierarchical tree structure with the C1TreeExtender control. The C1TreeExtender control supports expand/collapse animations, stylish themes, and drag-and-drop functionality.
C1TreeExtender Markup
The following markup creates C1TreeExtender control. Set the TargetControlID property to attach the extender to a control.
<cc1:C1TreeExtender ID="Panel1_C1TreeExtender" runat="server"
TargetControlID="Panel1">
</cc1:C1TreeExtender>