multi level gridview

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C#

ASP.NET

Gridview

hi guys,
i have a question:
i have to make a multilevel nested gridview, that means i dont know how often i have to create a new childgridview in my parent gridview(headers are always the same).
My probem is how can i make this dynamically?
I tryed(Multilevel Nested Master/Detail Data Display Using GridView[^] ) a lot.

<asp:GridView ID="GridView1" runat="server"  AutoGenerateColumns="False"
        OnRowDataBound="GridOnRowDataBound" ForeColor="#333333" Height="214px"
        Width="555px">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <a href="javascript:switchViews('div<%# Eval("ID") %>', 'one');">
                        <img id="imgdiv<%# Eval("ID") %>" alt="Click to show/hide orders" border="0" src="plus.png" />
                    </a>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField ="ID" HeaderText="ID:"/>
            <asp:BoundField DataField="Firstname" HeaderText="Firstname:"/>
            <asp:BoundField DataField="LastName" HeaderText="Lastname:"/>
            <asp:BoundField DataField="Parent" HeaderText="Parent:"/>
            <asp:TemplateField>
                <ItemTemplate>
                ...

protected void GridOnRowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {             
                GridView gv = (GridView)(e.Row.FindControl("GridView2"));     
                gv.DataSource =buffer2; //objectlist
                gv.DataBind();
            }
        }

may someone can give me a good advice how to solve it.
thanks alot