请各位大侠帮忙看看我这个怎么实现里面checkbox单选
<asp:DataList ID="dl_news" runat="server" RepeatColumns="1" Width="300" OnItemDataBound="dl_news_ItemDataBound">
<itemtemplate>
<table style="width:300px; margin-bottom:20px; border-top:1px solid #993300;" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="30" style="width:100px;"> </td>
<td width="370" align="left" style="line-height:35px;"><%#Eval("x_name").ToString()%></td>
</tr>
<tr>
<td> </td>
<td align="left">
<asp:Label id="labTypeID" runat="server" Visible="false" Text='<%#Eval("x_id").ToString()%>'></asp:Label>
<asp:DataList ID="dl_news2" runat="server" RepeatColumns="1" Width="300">
<itemtemplate>
<table style="width:200px; line-height:25px;" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<asp:Label id="child_Item" runat="server" Visible=False Text='<%#Eval("Nid").ToString()%>'></asp:Label>
<asp:CheckBox ID="Check_Item" runat="server" />
<asp:Label id="L_text" runat="server" Visible=true Text='<%#Eval("投票选项").ToString()%>'></asp:Label>
</td>
</tr>
</table>
</itemtemplate>
</asp:DataList>
</td>
</tr>
</table>
</itemtemplate>
</asp:DataList>
里面一个distlist是绑定投票选项的,请各位大侠帮忙看看我这个怎么实现里面checkbox单,我在网上找也没有找到合适的案例,绑定出的数据要实现分别单选。