阴囊注水打气:DataList里面的ImageButton对应的CommandName无响应

<asp:datalist id="DataList1" style="Z-INDEX: 101; LEFT: 256px; POSITION: absolute; TOP: 16px"
runat="server" RepeatColumns="1" Width="456px">
<ItemTemplate>
<table style="WIDTH: 472px; HEIGHT: 141px" height="141" cellspacing="0" cellpadding="0"
width="472" bgcolor="#99ccff" border="0">

<tr>
<td align="center" height="15">
<asp:Button ID="btngou" runat="server" Text="购买" BorderColor="Silver" BackColor="Gainsboro"
BorderWidth="1px" CommandName="select"></asp:Button>
 </td>
<td align="left">
<asp:Button ID="btnfavorite" runat="server" Text="加入收藏夹" BorderColor="Silver" BackColor="Gainsboro"
BorderWidth="1px"></asp:Button>
 
<div>
<asp:ImageButton ID="ImageButton1" runat="server" CommandName="delete"></asp:ImageButton>
</div></td>
</tr>
</table>
</ItemTemplate>
</asp:datalist>