aspx问题。。。帮个忙啊

我总监让我做个页面显示把aspx.cs文件删了。然后在页面是写pageLoad事件读取想要的东西。例如!--#include file="_pager.aspx"-->
<!--#include file="_html.aspx"-->
<script runat="server" language="C#">
    protected string contents = String.Empty; //联系方式
    protected void Page_Load(object sender, EventArgs e)
    {
        Init();
        using (ASDhtDataBase db = new ASDhtDataBase(false))
        {
            DataRowObject contact = db.SqlExecDataRow("select * from [page] where id='help_tour'");
            if (contact != null) contents = contact["value"];
            
        }
    }
</script>
<div id="doc">
    <!--#include file="_header.aspx"-->
        <div id="bdw" class="bdw">
            <div id="bd" class="cf">
                <div id="learn">
                    <!--#include file="_help.aspx"-->
                    <div id="content" class="about clear">
                        <div class="box">
                            <div class="box-content">
                                <div class="head">
                                    <h2>
                                        玩转<%=system["abbreviation"] %></h2>
                                </div>
                                <div class="sect">
                                     <%=contents %>
                                </div>
                            </div>
                        </div>
                    </div>
                         <!--#include file="_sidebar.aspx"--> 
                </div>
            </div>
            <!-- bd end -->
        </div>
        <!-- bdw end -->
             <!--#include file="_footer.aspx"-->
    </div>
<!--#include file="_end.aspx"-->这样的但是我郁闷了为什么不在cs文件里写呢我查了下那个include是asp中的用法是吧到底是啥个意思么。。哪位高手能解答下