DataList嵌套

弄了一天，终于搞定
正确代码如下：
aspx代码如下：  最主要的是看子DataList的DataSource事件的绑定
<asp:DataList id="provincelist" runat="server" Width="770px">
    <ItemTemplate>
     <table width="770">
      <tr>
       <td height="31"><table width="100%" border="0" cellspacing="0" cellpadding="0">
         <tr>
          <td width="2%" height="30"><div align="right"><img src="images/c_04_ico.gif" width="24" height="24" /></div>
          </td>
          <td width="98%" class="la13">&nbsp;<a href='prolist.aspx?pro_id=<%# DataBinder.Eval(Container.DataItem,"provinceid") %>' class="la13" target=_blank>
            <%# DataBinder.Eval(Container.DataItem,"provincename") %>
           </a>
          </td>
         </tr>
        </table>
       </td>
      </tr>
      <tr>
       <td height="27">
       <asp:DataList id="citylist" runat="server" DataSource='<%# Getprovinceid(Convert.ToInt32(DataBinder.Eval(Container.DataItem, "provinceid"))) %>' RepeatColumns="50" RepeatDirection="Horizontal"
       RepeatLayout="Flow" Width="98%">
       <ItemTemplate>
       ·<a href='province_1_18.html' title='澳门市大堂区' class="h"><%# DataBinder.Eval(Container.DataItem,"cityname") %></a> &nbsp;&nbsp;
       </ItemTemplate>
       </asp:DataList>
       </td>
      </tr>
     </table>
    </ItemTemplate>
   </asp:DataList>

后台代码：
  public DataView Getprovinceid(int provinceid)
  {
   DataSet qDs = qDAO.liebiaolist("add_city","cityid",provinceid,"provinceid");
   return qDs.Tables[0].DefaultView;
  }