Easiest is to add a placeholder control to the ItemTemplate, as ItemTemplate has no ID.
<asp:TemplateField>
<ItemTemplate>
<asp:PlaceHolder ID="emails" runat="server"></asp:PlaceHolder>
</ItemTemplate>
</asp:TemplateField>
and then in RowDataBound event
if (e.Row.RowType == DataControlRowType.DataRow)
{
PlaceHolder emails = e.Row.FindControl("emails") as PlaceHolder;
if (emails != null)
{
LinkButton lbEmail = new LinkButton();
lbEmail.Text = "your text";
lbEmail.Click += new EventHandler(SendEmail);
emails.Controls.Add(lbEmail);
}
}
Of course, the example is simplified. You can easily extend it to your needs.