<asp:TreeView  ID="TreeView1" runat="server"
   DataSourceID="SiteMapDataSource1" ExpandDepth="0">
      <DataBindings>
         <asp:TreeNodeBinding DataMember="SiteMapNode" NavigateUrlField="URL"
         PopulateOnDemand="true" TextField="Title" />
      </DataBindings>
</asp:TreeView>
