<asp:datagrid id="Datos" runat="server" Width="168px" AutoGenerateColumns="False" CssClass="datagrid">
<SelectedItemStyle CssClass="DataGridSelectedItem"></SelectedItemStyle>
<AlternatingItemStyle CssClass="DataGridAlternatedItem"></AlternatingItemStyle>
<ItemStyle CssClass="DataGridItem"></ItemStyle>
<HeaderStyle CssClass="DataGridHeader"></HeaderStyle>
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<!-- tus controles -->
<asp:ImageButton Runat="server" id="imgTempo" ImageUrl="imagen.gif" CommandName="Prueba"></asp:ImageButton>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:datagrid>
Salu2