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这里例子结合了DataList的分页和嵌套,还有点击显示相对内容的关联。
HTML代码:
<%@ Page language="c#" Codebehind="DataListNews.aspx.cs" AutoEventWireup="false" Inherits="DataListNesting.DataListNews" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
 <HEAD>
  <title>DataList嵌套,分页,点击标题显示内容</title>
  <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
  <meta content="C#" name="CODE_LANGUAGE">
  <meta content="JavaScript" name="vs_defaultClientScript">
  <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
  <style>BODY { FONT-SIZE: 12px }
 A:link { TEXT-DECORATION: none }
 A:visited { TEXT-DECORATION: none }
  </style>
  <script language="JavaScript">
   scores = new Array(20);
   var numTotal=0;
   NS4 = (document.layers) ? 1 : 0;
   IE4 = (document.all) ? 1 : 0;
   ver4 = (NS4 || IE4) ? 1 : 0;

/*if (ver4) {
   with (document) {
       write("<STYLE TYPE='text/css'>");
       if (NS4) {
           write(".parent {position:absolute; visibility:visible}");
           write(".child {position:absolute; visibility:visible}");
           write(".regular {position:absolute; visibility:visible}")
       }
       else {
           write(".child {display:none}")
       }
       write("</STYLE>");
   }
}*/

  function getIndex(el)
  {
   ind = null;
   for (i=0; i<document.layers.length; i++)
   {
    whichEl = document.layers[i];
    if (whichEl.id == el) {
     ind = i;
     break;
    }
   }
   return ind;
  }

  function arrange()
  {
   nextY = document.layers[firstInd].pageY+document.layers[firstInd].document.height;
   for (i=firstInd+1; i<document.layers.length; i++)
   {
    whichEl = document.layers[i];
    if (whichEl.visibility != "hide")
    {
     whichEl.pageY = nextY;
     nextY += whichEl.document.height;
    }
   }
  }

  function initIt()
  {
   if (!ver4) return;
   if (NS4)
   {
    for (i=0; i<document.layers.length; i++)
    {
     whichEl = document.layers[i];
     if (whichEl.id.indexOf("Child") != -1) whichEl.visibility = "hide";
    }
    arrange();
   }
   else
   {
    divColl = document.all.tags("DIV");
    for (i=0; i<divColl.length; i++)
    {
     whichEl = divColl(i);
     if (whichEl.className == "child") whichEl.style.display = "none";
    }
   }
  }

  function expandIt(el)
  {
   if (!ver4) return;
   if (IE4)
   {
    whichEl1 = eval(el + "Child");
    for(i=0;i<=numTotal-1;i++)
    {
      whichEl = eval(scores[i] + "Child");
      if(whichEl!=whichEl1)
      {
        whichEl.style.display = "none";
      }
    }
    whichEl1 = eval(el + "Child");
    if (whichEl1.style.display == "none")
    {
     whichEl1.style.display = "block";
    }
    else
    {
     whichEl1.style.display = "none";
    }
   }
   else
   {
    whichEl = eval("document." + el + "Child");
    for(i=0;i<=numTotal-1;i++)
    {
      whichEl = eval("document." + scores[i] + "Child");
      if(whichEl!=whichEl1)
      {
        whichEl.visibility = "hide";
      }
    }
    if (whichEl.visibility == "hide")
    {
     whichEl.visibility = "show";
    }
    else
    {
     whichEl.visibility = "hide";
    }
    arrange();
   }
  }
  onload = initIt;
  </script>
 </HEAD>
 <body MS_POSITIONING="GridLayout">
  <form id="Form1" method="post" runat="server">
   <table align="center" border="1" width="90%" style="BORDER-COLLAPSE: collapse" borderColor="#cccccc">
    <tr>
     <td align="center" height="30"><font style="FONT-WEIGHT: bold; FONT-SIZE: 11pt">DataList嵌套,分页,点击标题显示内容</font></td>
    </tr>
    <TR>
     <TD style="HEIGHT: 15px" align="center"><font style="FONT-SIZE: 10pt">共</font>
      <asp:label id="lbTotalPage" runat="server"></asp:label><font style="FONT-SIZE: 10pt">页/共</font>
      <asp:label id="lbTotalCount" runat="server"></asp:label><font style="FONT-SIZE: 10pt">记录&nbsp;
       当前</font>
      <asp:label id="lbCurrentPage" runat="server"></asp:label><font style="FONT-SIZE: 10pt">页</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      <font style="FONT-SIZE: 10pt">跳转到</font>
      <asp:dropdownlist id="ddlPage" runat="server" Width="65px" AutoPostBack="True"></asp:dropdownlist><font style="FONT-SIZE: 10pt">页</font></TD>
    </TR>
    <tr>
     <td align="center">
      <asp:DataList id="dlParent" runat="server" DataKeyField="ClassId" Width="70%">
       <AlternatingItemStyle Font-Size="X-Small"></AlternatingItemStyle>
       <ItemStyle Font-Size="X-Small" HorizontalAlign="Center"></ItemStyle>
       <ItemTemplate>
        <DIV id="KB1Parent" style="MARGIN-BOTTOM: 0px"><A id="aurl" onclick="expandIt('KB1');return false" href="javascript:void(0);" runat="server"><FONT style="FONT-SIZE: 14px"><%# DataBinder.Eval(Container.DataItem,"ClassName") %>
           <asp:Label id="lbCount" runat="server"></asp:Label></FONT></A></DIV>
        <DIV class="child" id="KBChild" runat="server">
         <asp:DataList id="dlChild" runat="server" ShowHeader="False" ShowFooter="False" RepeatDirection="Horizontal"
          RepeatColumns="3">
          <ItemTemplate>
           &nbsp;&nbsp;<a target=_blank href='<%# "ShowInfo.aspx?Id=" + DataBinder.Eval(Container.DataItem,"Id") %>'><FONT style="FONT-SIZE: 12px"><%# DataBinder.Eval(Container.DataItem,"Name") %></FONT></a>&nbsp;&nbsp;
          </ItemTemplate>
         </asp:DataList></DIV>
       </ItemTemplate>
      </asp:DataList>
     </td>
    </tr>
    <tr>
     <TD height="30" align="center">
      <asp:linkbutton id="FirstPage" runat="server" CssClass="pageLinks" CommandName="First" Text="[First Page]"
       OnCommand="NavigationLink_Click">
       <font style="FONT-SIZE: 10pt">第一页</font></asp:linkbutton>&nbsp;&nbsp;&nbsp;
      <asp:linkbutton id="PreviousPage" runat="server" CssClass="pageLinks" CommandName="Prev" Text="[Previous Page]"
       OnCommand="NavigationLink_Click">
       <font style="FONT-SIZE: 10pt">上一页</font></asp:linkbutton>&nbsp;&nbsp;&nbsp;
      <asp:linkbutton id="NextPage" runat="server" CssClass="pageLinks" CommandName="Next" Text="[Next Page]"
       OnCommand="NavigationLink_Click">
       <font style="FONT-SIZE: 10pt">下一页</font></asp:linkbutton>&nbsp;&nbsp;&nbsp;
      <asp:LinkButton id="LastPage" runat="server" CssClass="pageLinks" CommandName="Last" Text="[Last Page]"
       OnCommand="NavigationLink_Click">
       <font style="FONT-SIZE: 10pt">末一页</font></asp:LinkButton></TD>
    </tr>
   </table>
  </form>
 </body>
</HTML>

CS代码:

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace DataListNesting
{
 /// <summary>
 /// DataListNews 的摘要说明。
 /// </summary>
 public class DataListNews : System.Web.UI.Page
 {
  protected System.Web.UI.WebControls.Label lbTotalPage;
  protected System.Web.UI.WebControls.Label lbTotalCount;
  protected System.Web.UI.WebControls.Label lbCurrentPage;
  protected System.Web.UI.WebControls.DropDownList ddlPage;
  protected System.Web.UI.WebControls.DataList dlParent;
  protected System.Web.UI.WebControls.LinkButton FirstPage;
  protected System.Web.UI.WebControls.LinkButton PreviousPage;
  protected System.Web.UI.WebControls.LinkButton NextPage;
  protected System.Web.UI.WebControls.LinkButton LastPage;
  private Int32 CurrentPageNumber=1;
  private int PageSize=5;
  private string strConn="server=localhost;uid=sa;pwd=;database=AspNetTest";
  private void Page_Load(object sender, System.EventArgs e)
  {
   if(!IsPostBack)
   {
    BindData();
   }
  }

  #region Web 窗体设计器生成的代码
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
  
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.dlParent.ItemDataBound += new System.Web.UI.WebControls.DataListItemEventHandler(this.dlParent_ItemDataBound);
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion

  private DataSet BindParent(int PageSize,int CurrentPageNumber)
  {
   SqlConnection Conn=new SqlConnection(strConn);
   SqlCommand Cmd=new SqlCommand();
   Cmd.Connection=Conn;
   Cmd.CommandType=CommandType.StoredProcedure;
   Cmd.CommandText="BindNews";
   SqlParameter pramsPageSize=new SqlParameter();
   pramsPageSize.ParameterName="@PageSize";
   pramsPageSize.Value=PageSize;

   SqlParameter pramsCurrent=new SqlParameter();
   pramsCurrent.ParameterName="@PageIndex";
   pramsCurrent.Value=CurrentPageNumber;

   SqlParameter pramsDocount=new SqlParameter();
   pramsDocount.ParameterName="@Docount";
   pramsDocount.Value=false;

   Cmd.Parameters.Add(pramsCurrent);
   Cmd.Parameters.Add(pramsDocount);
   Cmd.Parameters.Add(pramsPageSize);
   SqlDataAdapter da=new SqlDataAdapter();
   da.SelectCommand=Cmd;
   DataSet ds=new DataSet();
   Conn.Open();
   da.Fill(ds);
   Conn.Close();
   ViewState["Count"]=ds.Tables[0].Rows.Count.ToString();
   return ds;
  }

  private void dlParent_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)
  {
   if(e.Item.ItemIndex!=-1)
   {
    int ClassID=int.Parse(dlParent.DataKeys[e.Item.ItemIndex].ToString());
    DataSet ds=BindChild(ClassID);
    Label lb=(Label)e.Item.FindControl("lbCount");
    lb.Text=" (" + ds.Tables[0].Rows.Count.ToString() + ") ";
    DataList list=(DataList)e.Item.FindControl("dlChild");
    list.DataSource=ds.Tables[0].DefaultView;
    list.DataBind();
    HtmlAnchor hr=(HtmlAnchor)e.Item.FindControl("aurl");
    HtmlGenericControl dv=(HtmlGenericControl)e.Item.FindControl("KBChild");
    hr.ID="KB";
    string ss="expandIt('dlParent__ctl"+e.Item.ItemIndex+"_"+hr.ID+"')";
    hr.Attributes.Add("onclick",ss.ToString());
    dv.ID=hr.ID+"Child";
    string scripts="<script>numTotal=" + int.Parse(ViewState["Count"].ToString()) +";";
    for(int i=0;i<int.Parse(ViewState["Count"].ToString());i++)
    {
     scripts +="scores[" + i + "]='dlParent__ctl" + i + "_" + hr.ID + "';";
    }
    scripts +="</script>";
    Page.RegisterStartupScript("scripts",scripts.ToString());
   }
  }

  private DataSet BindChild(int ClassID)
  {
   SqlConnection Conn=new SqlConnection(strConn);
   SqlCommand Cmd=new SqlCommand("select * from NewsInfo where ClassID="+ClassID+"",Conn);
   SqlDataAdapter da=new SqlDataAdapter();
   da.SelectCommand=Cmd;
   DataSet ds=new DataSet();
   Conn.Open();
   da.Fill(ds);
   Conn.Close();
   return ds;
  }


  protected void NavigationLink_Click ( Object sender, CommandEventArgs e )//此事件为HTML代码里注册(事件为OnCommand)
  {
   switch ( e.CommandName )//根据设置的CommandName属性判断
   {
    case "First":
     CurrentPageNumber = 1;
     break;
    case "Last":
     CurrentPageNumber = Int32.Parse ( lbTotalPage.Text );
     break;
    case "Next":
     CurrentPageNumber = Int32.Parse ( lbCurrentPage.Text ) + 1;
     break;
    case "Prev":
     CurrentPageNumber = Int32.Parse ( lbCurrentPage.Text ) - 1;
     break;
   }
   BindData();
   
  }

  public Int32 GetPCount()
  {
   SqlConnection Conn=new SqlConnection(strConn);
   SqlCommand Cmd=new SqlCommand();
   Cmd.Connection=Conn;
   Cmd.CommandType=CommandType.StoredProcedure;
   Cmd.CommandText="BindNews";
   SqlParameter pramsPageSize=new SqlParameter();
   pramsPageSize.ParameterName="@PageSize";
   pramsPageSize.Value=1;

   SqlParameter pramsCurrent=new SqlParameter();
   pramsCurrent.ParameterName="@PageIndex";
   pramsCurrent.Value=1;

   SqlParameter pramsDocount=new SqlParameter();
   pramsDocount.ParameterName="@Docount";
   pramsDocount.Value=false;

   Cmd.Parameters.Add(pramsCurrent);
   Cmd.Parameters.Add(pramsDocount);
   Cmd.Parameters.Add(pramsPageSize);
   Conn.Open();
   Int32 Tcount=Int32.Parse(Cmd.ExecuteScalar().ToString());
   Conn.Close();
   return Tcount;
  }

  public void BindData()
  {
   lbCurrentPage.Text = CurrentPageNumber.ToString();
   
   //绑定DATAGRID
   DataSet ds=BindParent(PageSize,CurrentPageNumber);
   dlParent.DataSource=ds.Tables[0].DefaultView;
   dlParent.DataBind();

   Double TotalPages = 1;//初始化,总页数为1
   Double ModePages=0;//取模余数(判断总页数是否要加1)
  
   Int32 TotalRecords = GetPCount();//调用上面的得到总记录数的方法
   TotalPages = TotalRecords / PageSize;//得到总页数(总记录数除以每页的记录数)
   ModePages=TotalRecords%PageSize;//得到取模的余数(总记录数取模每页的记录数)
   if(ModePages>0)//如果取模数不等于0,则把总页数加1
   {
    TotalPages+=1;
   }
   if(ModePages==0)//如果取模数等于0,不做任何事(也可以不用判断)
   {
   }
   if(TotalPages==0)
   {
    TotalPages=1;
   }
   lbTotalPage.Text = TotalPages.ToString();//显示页面上的总页数
   lbTotalCount.Text=TotalRecords.ToString();//显示页面上的总记录数

   //以下为判断点击的按钮(第一页,上一页,下一页,末一页)是否可以用
   if ( CurrentPageNumber == 1 )
   {
    PreviousPage.Enabled = false;
    FirstPage.Enabled=false;
    if ( TotalPages > 1 )
    {
     NextPage.Enabled = true;
     LastPage.Enabled=true;
    }
    else
    {
     NextPage.Enabled = false;
     LastPage.Enabled=false;
    }
   }
   else
   {
    PreviousPage.Enabled = true;
    FirstPage.Enabled=true;

    if ( CurrentPageNumber == TotalPages )
    {
     NextPage.Enabled = false;
     LastPage.Enabled=false;
    }
    else
    {
     NextPage.Enabled = true;
     LastPage.Enabled=true;
    }
   }

   ddlPage.Items.Clear();//清楚跳转的页数(如果不清除,里面的记录将会循环增加)
   int PCount=int.Parse(lbTotalPage.Text);//得到总页数,为了循环
   if(PCount==0)
   {
    PCount=1;
   }
   for(int i=1;i<=PCount;i++)
   {
    ddlPage.Items.Add(i.ToString());
   }
   ddlPage.Items.FindByText(CurrentPageNumber.ToString()).Selected=true;//把当前页显示在列表框的第一个
   
  }

  private void ddlPage_SelectedIndexChanged(object sender, System.EventArgs e)
  {
   int PageSize=int.Parse(ddlPage.SelectedValue.ToString());
   int PageCount=Int32.Parse(lbTotalPage.Text.Trim().ToString());
   if(PageSize<1)
   {
    CurrentPageNumber=1;
   }
   else if(PageSize>PageCount)
   {
    CurrentPageNumber=PageCount;
   }
   else
   {
    CurrentPageNumber=PageSize;
   }
   BindData();
  }
 }
}


注意:在CS文件里开始设置PageSize为每页显示的记录,例子里设置的是5条,可以按照自己的要求修改,
下载例子里有一个DataBase文件夹,里面有数据库ACCESS,你可以导入到SQL中,然后运行文本文件里的分页存储过程,然后修改一下CS文件里的连接字符串即可运行 ,有什么不足的地方请大家指教。
例子下载:/Files/sunnystar365/DataListNesting.rar


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