这个怎么做？

user_build.aspx页面
<%@ Page Language="C#" MasterPageFile="~/users/MasterPage.master" AutoEventWireup="true"
    CodeFile="user_build.aspx.cs" Inherits="users_user_build" Title="Untitled Page" %><asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">    
    <div style="width: 246px; height: 100px" id="DIV1">
        <asp:DataList ID="dlbuild" runat="server" Width="242px" Height="452px">
            <ItemTemplate>
                <table>
                     <tr>
                         <td align="left">
                             <span style="font-size: 12px; line-height: 20px;">建筑名称：</span> <span style="font-size: 12px;
                                 line-height: 20px;">
                                 <%# Eval("city_name")%>
                             </span>
                             <br />
                             <span style="font-size: 12px; line-height: 20px;">建筑所在城市：</span> <span style="font-size: 12px;
                                 line-height: 20px;">
                                 <%# Eval("name")%>
                             </span>
                             <br />
                             <span style="font-size: 12px; line-height: 20px;">建筑状态：</span> <span style="font-size: 12px;
                                 line-height: 20px;">
                                <%# getchange(Convert.ToInt32(Eval("build_states")))%> 查看
                             </span>
                             <br />
                             <span style="font-size: 12px; line-height: 20px;">建筑数量：</span> <span style="font-size: 12px;
                                 line-height: 20px;">
                                 <%# Eval("buildnumber")%>
                             </span>  
                         </td>
                </tr>
            </table>
        </ItemTemplate>
        <SeparatorTemplate>
            <hr />
        </SeparatorTemplate>
    </asp:DataList><asp:Label ID="lblCurrentPage" runat="server"></asp:Label><asp:LinkButton
    ID="btnBack" runat="server" BackColor="White" OnClick="btnBack_Click" Text=" 后 退 "></asp:LinkButton>
        &nbsp;&nbsp; &nbsp;<asp:LinkButton ID="btnAdvance" runat="server" BackColor="White"
            OnClick="btnAdvance_Click" Text=" 前 进 "></asp:LinkButton></div>
</asp:Content>