не вижу проблем, вот даже попробовал
<%@ Page language="c#" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<script runat="server">
private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
ddlTest.Items.Insert(0, new ListItem("Hello", "12"));
ddlTest.Items.Insert(0, new ListItem("GoodBye", "12"));
ddlTest.Items.Insert(0, new ListItem("Merci", "12"));
}
ddlTest.SelectedIndex = 2;
}
</script>
</HEAD>
<body>
<form runat=server>
<asp:DropDownList id="ddlTest" style="Z-INDEX: 101; LEFT: 96px; POSITION: absolute; TOP: 104px" runat="server"></asp:DropDownList>
</form>
</body>
</HTML>
