“System.Web.UI.WebControls.ListViewItem”不包含“DataItem”的定义
 <asp:ListView ID="listView" runat="server" OnItemDataBound="nav_1_Bound">
        <LayoutTemplate>
                <asp:PlaceHolder ID="itemPlaceHolder" runat="server"></asp:PlaceHolder>
        </LayoutTemplate>
        <ItemTemplate>
           <div class="newTownBrowse_header">活动总标题：<%#Eval("title") %></div>
           <asp:Repeater ID="nav_2" runat="server">
                                            <ItemTemplate>
                                                <div class="newTownBrowse_box">
                                                          <dl class="newTownBrowse_item">
                                                          <dt><div class="newTownBrowse_item_img"><img src='<%#Eval("source") %>' alt="" width="185" height="211"></div></dt>
                                                          <dd><a href="../xcylCont.aspx?id=<%#Eval("id") %>&uid=<%#Eval("uid") %>&tab=15"><%#Eval("title") %></a></dd>
                                                          </dl>