优秀的百万级数据分页代码

*/ --------------------------------------------------------------------------------------
*/ 出自： 建站学  http://www.jzxue.com
*/ 作者： 天涯听雨    E-mail：qcfy2005@163.com    QQ：809252803
*/ 时间： 2007-10-6  编程论坛首发
*/ 声明： 尊重作者劳动，转载请保留本段文字
*/ --------------------------------------------------------------------------------------


<%
'名称：百万数据进行分页
'作者：天涯听雨 
'时间：2007年10月6日
'平台：Win2000+IIS5.0+Sql2000
'附言：第一次写就运用简单一些，大家不要骂……

'----------------------------------------------------------连接数据库
Response.Buffer = True
Dim SqlLocalName,SqlUsername,SqlPassword,SqlDatabaseName
Dim ConnStr,Conn

'''''''''''''''''''''''''''''' SQL数据库 ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
SqlLocalName   ="(local)"       '连接IP  [ 本地用 (local) 外地用IP ]
SqlUsername    ="sa"             '数据库用户名 
SqlPassword    ="XXXXXX"         '用户密码 
SqlDatabaseName="News2008"       '数据库名
ConnStr = "Provider=Sqloledb;User ID=" & SqlUsername & "; Password=" & SqlPassword & "; Initial Catalog = " & SqlDatabaseName & "; Data Source=" & SqlLocalName & ";"
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
On Error Resume Next
Set Conn=Server.CreateObject("ADODB.Connection")
Conn.open ConnStr

If Err Then
   err.Clear
   Set Conn = Nothing
   Response.Write "<div style='font-size:14px;color=#ff0000' align='center'>数据库连接出错，请检查数据库连接字串</div>"
   Response.End
End If
'----------------------------------------------------------连接数据库完成

'定义变量
'TblName-表名；FldName-排列字段名；FieldName-需读取的字段名；PageSizeX-分页大小；PageCountX-总页数；PageNo-当前页;OrderType-排序方式；StrWhere-条件语句
'StrSql-总执行语句；FieldCount-总记录数；StrTmp,StrOrder-临时变量

Dim TblName,FldName,FieldName,PageSizeX,PageCountX,PageNo,OrderType,StrWhere
Dim StrSql,FieldCount,StrTmp,StrOrder,TopField

'进行赋值
PageNo=trim(Request.Querystring("PageNo"))
if isnumeric(PageNo) or PageNo="" then  '如果没有Page值，进行初始化值
   PageNo=abs(PageNo)
   if PageNo=0 then PageNo=1
else
   PageNo=1
end if

TblName = "TableNews"
FldName = "ID"    '说明，排序字段值在数据库不能有重复  :  建议是主键
FieldName="ID,Title,AddTime"
PageSizeX=30
OrderType=1 '0-为降序 1-升序
StrWhere=" (Code='0101') and (Hits>100) " '注意: 一个条件就用()双括号括起来 第一个不用and

TopField=(PageNo-1)*PageSizeX  'TOP多少条

if OrderType=0 then
   StrTmp   = "<(Select min"
   StrOrder = " Order BY ["&FldName&"] desc"
else
    StrTmp   = ">(Select max"
    StrOrder = " Order BY ["&FldName&"] asc"
end if

'定义sql语句
StrSql="Select Top "&Clng(PageSizeX)&" "& FieldName &" From "&TblName&" "

if PageNo=1 then  '如果是第一页时，执行如下代码查库速度快
   if StrWhere<>"" then
      StrSql=StrSql&" Where "&StrWhere & StrOrder&""
   else
      StrSql=StrSql & StrOrder
   end if
else
   if StrWhere<>"" then
      StrSql=StrSql&" Where "& FldName & StrTmp&"("&FldName&") From (Select top "& Clng(TopField)&" "&FldName &" From  "&TblName&" Where "& StrWhere & StrOrder &") as tblTmp) and "& StrWhere & StrOrder&""
   else
      StrSql=StrSql&" Where "& FldName & StrTmp&"("&FldName&") From (Select top "& Clng(TopField)&" "&FldName &" From  "&TblName & StrOrder &") as tblTmp) "&StrOrder&""
   end if 
end if

Set rs=Conn.exeCute(StrSql) '执行查询

if rs.bof and rs.eof then
   Conn.Close : set Conn=nothing
   response.write "<script LANGUAGE='javascript'>alert('当前没有找到任何记录，请返回重新操作！');history.go(-1);</script>"
   response.end
end if

if StrWhere<>"" then '求总记录数
   FieldCount=Conn.exeCute("Select Count("&FldName&") From "&TblName&" Where "&StrWhere&"")(0)
else
   FieldCount=Conn.exeCute("Select Count("&FldName&") From "&TblName&"")(0)
end if

if (FieldCount mod nPageSize)>0 then '求总页数 PageCountX
    PageCountX=((FieldCount - (FieldCount mod PageSizeX))/ PageSizeX)+1
else
    PageCountX= (FieldCount / PageSizeX)
end if

'显示数据 
do while not rs.eof
   response.write""&rs("Title")&"&nbsp;&nbsp;&nbsp;添加时间："&rs("AddTime")&"<br/>"
rs.movenext
loop

'进行关闭和释放相关资源
rs.Close
Conn.Close : Set Conn=nothing

'显示分页
if PageNo<=1 then
   Response.Write "<font color='#FF0000'>[首页] [上一页]</font>"
else
   Response.Write"[<a href='?PageNo=1' target='_self' title='首页'><font color='#FF0000'>首页</font></a>] "
   Response.Write"[<a href='?PageNo="&(PageNo-1)&"' target='_self' title='上一页'><font color='#FF0000'>上一页</font></a>] "
end if

if PageNo>=PageCountX then
    Response.Write "<font color='#FF0000'>[下一页] [尾页]</font>"
else
    Response.Write"[<a href='?PageNo="&(PageNo+1)&"'  target='_self' title='下一页'><font color='#FF0000'>下一页</font></a>] "
    Response.Write"[<a href='?PageNo="&PageCountX&"' target='_self' title='尾页'><font color='#FF0000'>尾页</font></a>]"
end if

Response.Write"[页次 第<font color=red>"&PageNo&"</font>页/共<font color=red>" & PageCountX &"</font>页]"
Response.Write" [共<font color=red>"&FieldCount&"</font>条 <font color=red>"& PageSizeX & "</font>条/页]"
Response.Write" 转到：<select name='page' size='1' onchange=""javascript:window.location = '?PageNo='+this.options[this.selectedIndex].value;"">"

for i=1 to PageCountX
    Response.Write"<option value="&i&""
    if PageNo=i then Response.Write" selected"
    Response.Write(">第-"&i&"-页</option>")
next
Response.Write"</selected>"
%>