Repeater嵌套绑定Repeater

private void RpTypeBind()
         {//GetQuestionTypeAndCount() 返回一个datatable
            this.rptypelist.DataSource = LiftQuestionCtr.GetQuestionTypeAndCount();                   
             this.rptypelist.DataBind();
         }
                protected void rptypelist_ItemDataBound(object sender, RepeaterItemEventArgs e)
         {

//判断里层repeater处于外层repeater的哪个位置（ AlternatingItemTemplate，FooterTemplate，

//HeaderTemplate，，ItemTemplate，SeparatorTemplate）
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
             {
                 Repeater rep = e.Item.FindControl("rpquestionlist") as Repeater;//找到里层的repeater对象
                DataRowView rowv = (DataRowView)e.Item.DataItem;//找到分类Repeater关联的数据项 
                int typeid = Convert.ToInt32(rowv["qtid"]); //获取填充子类的id  
                rep.DataSource = LiftQuestionCtr.GetSomeQuestionsByTypeid(typeid, 2);
                 rep.DataBind();
             }
         }
/<table border="0" cellpadding="0" cellspacing="0" style="margin-bottom: 5px" width="100%">
     <asp:Repeater runat="server" ID="rptypelist" OnItemDataBound="rptypelist_ItemDataBound">
         <ItemTemplate>
             <tr>
                 <td class="fb">
                       <a href="Lists.aspx?Qtid=<%#Eval("qtid") %>"><%#Eval("qtypename") %></a> <span id="askCount_15"
                         class="date2">[<%#Eval("typecount")%>]</span>
                 </td>
             </tr>
             <tr>
                 <td>
                     <div id="askTop2_15" class="ask_list">
                         <asp:Repeater runat="server" ID="rpquestionlist">
                             <ItemTemplate>
                                 <a href="Question.aspx?qid=<%#Eval("liftquestionid")%>">
                                     <%#Eval("questiontitle")%></a><br />
                             </ItemTemplate>
                         </asp:Repeater>
                     </div>
                 </td>
             </tr>
         </ItemTemplate>
     </asp:Repeater>
</table>