<asp:TemplateField HeaderText="" SortExpression="">
  <ItemTemplate>       
    <asp:LinkButton ID="cmdElimina" runat="server" ToolTip="Elimina" OnClientClick="return confirm('Eliminare il record selezionato?')"
      CommandName="Elimina" CommandArgument='<%#Eval("ID")%>'>
      <i class="fa fa-times"></i>
    </asp:LinkButton>
  </ItemTemplate>
</asp:TemplateField>