优秀的百万级数据分页存储过程代码

原帖及回复：http://bbs.bc-cn.net/dispbbs.asp?boardid=10&id=180627

*/ --------------------------------------------------------------------------------------
*/ 出自： 编程中国 http://www.bc-cn.net
*/ 作者： 天涯听雨 E-mail：qcfy2005#163.com
*/ 时间： 2007-10-25 编程论坛首发
*/ 声明： 尊重作者劳动，转载请保留本段文字
*/ --------------------------------------------------------------------------------------

<%
'平台：Win2000+IIS5.0+Sql2000
'附言：升级上一次版本，上一次版为SQL版本，没有利用上存储过程
'上一版本 :[原创]优秀的百万级数据分页代码——(忙乎了半天)(http://bbs.bc-cn.net/dispbbs.asp?BoardID=10&ID=175543)

'----------------------------------------以下代码为网页代码

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="NewsTable" '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

'本类进行实例化代码，不将所有可能性条件分页考虑进去。本类仅作参考
'--------------------------------------------------------------------------------------------

'PageNo-当前页;PageSizeX-分页大小;PageCountX-总页数;FieldCount-总记录数;StrWhere-查询条件
Dim PageNo,PageSizeX,PageCountX,FieldCount,StrWhere

'进行赋值
PageNo=trim(Request.Querystring("PageNo"))

PageSizeX=30 '定义分页大小
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

StrWhere="(ClassCode=0101 and Hits>20)" '注意，此处注意字符的长度

set recom = server.createobject("adodb.command")
recom.activeconnection = Conn
recom.commandtype = 4

recom.commandtext = "News_Class"
recom.Parameters.Append recom.CreateParameter("@StrWhere",202,1,100,StrWhere)
recom.Parameters.Append recom.CreateParameter("@PageSize",3,1,,PageSizeX)
recom.Parameters.Append recom.CreateParameter("@PageIndex",3,1,,PageNo)

set rs = recom.execute ()

if rs.eof then
set rs=nothing : set recom=nothing : 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

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

'取得记录总数，计算页数
set rs = rs.NextRecordset
if rs("countx") > 0 then
FieldCount=rs("countx")
else
FieldCount=0
end if

if (FieldCount mod PageSizeX)>0 then
PageCountX=((FieldCount - (FieldCount mod PageSizeX))/ PageSizeX)+1
else
PageCountX= (FieldCount / PageSizeX)
end if

'进行关闭和释放相关资源
set rs=nothing : set recom=nothing : 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" & "<input id=zhuanpage name=zhuanpage size=2 value="&PageNo&">" & "页<input type=submit value=""Go"" onclick=""gotoPage()"">"
Response.Write"</td></tr></table>"
Response.Write"<script>function gotoPage(){var pg=document.getElementById('zhuanpage').value;if(isNaN(pg)||pg>"&PageCountX&"||pg<0){window.alert('请正确输入页码,只能为正整数!且不能大于"&PageCountX&"');return false;}else{window.location.href='?PageNo='+document.getElementById('zhuanpage').value+'';return true;}}</script>"
%>

'--------------------------------------------------------以下代码为存储过程代码
CREATE procedure News_Class

--资讯新闻百万级分页
(
@StrWhere varchar(100),
@PageSize int,
@PageIndex int
)

AS

declare @strSQL varchar(2000) -- 主语句
declare @strCountSQL varchar(2000) -- 总记录主语句
declare @strTmp varchar(1000) -- 临时变量

Set @strTmp =" Select top " + str(@PageSize) + " Title,AddTime from Tb_News " --此处注意，需几个字段读几个字段

if @StrWhere<>''
Begin

Set @strSQL=@strTmp + " where ID < (select min(ID) from (select top " + str((@PageIndex-1)*@PageSize)+" ID from Tb_News Where "+@StrWhere+" order by ID desc) as tblTmp ) and "+@StrWhere+" order by ID desc"

set @strCountSQL="select count(ID) as countx from Tb_News Where "+@StrWhere+" "

End

else
Begin

Set @strSQL=@strTmp + " where ID < (select min(ID) from (select top " + str((@PageIndex-1)*@PageSize)+" ID from Tb_News order by ID desc) as tblTmp ) order by ID desc"

set @strCountSQL="select count(ID) as countx from Tb_News "

End

if @PageIndex = 1
if @StrWhere<>''
Begin

Set @strSQL=@strTmp +" Where "+@StrWhere+" order by ID desc"

End
else
Begin

Set @strSQL=@strTmp +" order by ID desc"

End

exec (@strSQL)

exec (@strCountSQL)
GO