Hi ,
Check this
<div>
<asp:DropDownList ID="DropDownList1" runat="server" AppendDataBoundItems="True"
ValidationGroup="ss" DataSourceID="SqlDataSource1" DataTextField="name"
DataValueField="productID">
<asp:ListItem Text="---select---" Value="0" ></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
SelectCommand="SELECT [productID], [name] FROM [Product]">
</asp:SqlDataSource>
</div>
Best Regards
M.Mitwalli