I would want a tree view the loads automatically when i click on the main item of its node example. If i have select student it should automatically displayed all the subcategories down wards

<asp:TreeView ID="TreeView1" runat="server">
    <Nodes>
        <asp:TreeNode Text="Transport List" Value="Transport List">
            <asp:TreeNode Text="List" Value="List"></asp:TreeNode>
        </asp:TreeNode>
        <asp:TreeNode Text="New Node" Value="New Node"></asp:TreeNode>
    </Nodes>
 </asp:TreeView>