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asp分頁(yè)的一個(gè)類

asp分頁(yè)的一個(gè)類
在50,000條記錄下測(cè)試過(guò)，速度比ado的那個(gè)要快多了

%

'************************************************************************************
'具體用法
Dim strDbPath
Dim connstr
Dim mp
Set mp = New MyPage
strDbPath = "fenye/db.mdb"
connstr  = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
connstr  = connstr  Server.MapPath(strDbPath)
Set conn  = Server.CreateObject("Adodb.Connection")
conn.open connstr
set rs = mp.Execute("select * from table1",conn,29)
while not rs.eof
    response.write rs("aaaa")"br>"
    rs.MoveNext
wend
mp.pageDispaly()
'************************************************************************************
Class MyPage
    private MyPage_Conn,MyPage_StrSql,MyPage_TotalStrSql,MyPage_RS,MyPage_TotalRS
    private MyPage_PageSize
    private MyPage_PageAbsolute,MyPage_PageTotal,MyPage_RecordTotal
    private MyPage_Url
    public property let conn(strConn)
    set MyPage_Conn = strConn
    end property

    public property let PageSize(intPageSize)
        MyPage_PageSize = Cint(intPageSize)
    end property

    public function PageExecute(strSql)
        MyPage_PageAbsolute = MyPage_PageAbsoluteRequest()
        MyPage_TotalStrSql = FormatMyPage_TotalStrSql(strSql)
        set MyPage_TotalRS = MyPage_Conn.execute(MyPage_TotalStrSql)
        MyPage_RecordTotal = MyPage_TotalRS("total")
        MyPage_PageTotal = Cint(MyPage_RecordTotal/MyPage_PageSize)
        MyPage_StrSql = FormatMyPage_StrSql(strSql)
        set MyPage_RS = MyPage_Conn.execute(MyPage_StrSql)
        dim i
        i = 0
        while not MyPage_RS.eof and  i(MyPage_PageAbsolute-1)*MyPage_PageSize
            i = i + 1
            MyPage_RS.MoveNext
        wend
        set PageExecute = MyPage_RS
    end function

    public function Execute(strSql,strConn,intPageSize)
        conn = strConn
        PageSize = intPageSize
        set Execute = PageExecute(strSql)
    end function

    public function pageDispaly()
        MyPage_Url = ReadMyPage_Url
        firstPageTag = "font face=webdings>9/font>"  '|
        LastPageTag = "font face=webdings>:/font>"  '>>|
        previewPageTag = "font face=webdings>7/font>"  '
        nextPageTag = "font face=webdings>8/font>"  '>>
        dim strAnd
        if instr(MyPage_Url,"?")=0 then
            strAnd = "?"
        else
            strAnd = ""
        end if
        response.write "table width=100%  border=0 cellspacing=0 cellpadding=0>"
        response.write "tr>"
        response.write "td align=left>"
        response.write  "頁(yè)次:"MyPage_PageAbsolute"/"MyPage_PageTotal"頁(yè)nbsp"
        response.write  "主題數(shù):"MyPage_RecordTotal
        response.write "/td>"
        response.write "td align=right>"
        response.write  "分頁(yè):"
        if MyPage_PageAbsolute>10 then
            response.write  "a href='"MyPage_UrlstrAnd"MyPage_PageNo=1'>"firstPageTag"/a>"
            response.write  "a href='"MyPage_UrlstrAnd"MyPage_PageNo="(MyPage_PageAbsolute-10)"'>"previewPageTag"/a>"
        else
            response.write  firstPageTag
            response.write  previewPageTag
        end if
        response.write "nbsp"
        dim CurrentStartPage,i
        i = 1
        CurrentStartPage=(Cint(MyPage_PageAbsolute)\10)*10+1
        if Cint(MyPage_PageAbsolute) mod 10=0 then
            CurrentStartPage = CurrentStartPage - 10
        end if
        while i11 and CurrentStartPageMyPage_PageTotal+1
            if CurrentStartPage  10 then
                FormatCurrentStartPage = "0"  CurrentStartPage
            else
                FormatCurrentStartPage = CurrentStartPage
            end if
            response.write  "a href='"MyPage_UrlstrAnd"MyPage_PageNo="CurrentStartPage"'>"FormatCurrentStartPage"/a>nbsp"
            i = i + 1
            CurrentStartPage = CurrentStartPage + 1
        wend
        if MyPage_PageAbsolute(MyPage_PageTotal-10) then
            response.write  "a href='"MyPage_UrlstrAnd"MyPage_PageNo="(MyPage_PageAbsolute+10)"'>"nextPageTag"/a>"
            response.write  "a href='"MyPage_UrlstrAnd"MyPage_PageNo="MyPage_PageTotal"'>"LastPageTag"/a>"
        else
            response.write  nextPageTag
            response.write  LastPageTag
        end if
        response.write  ""
        response.write "/td>"
        response.write "/tr>"
        response.write "/table>"
    end function

    public function GetPageNo()
        GetPageNo = cint(MyPage_PageAbsolute)
    end function

    public function GetPageCount()
        GetPageCount = cint(MyPage_PageTotal)
    end function

    public function GetPageNoName()
        GetPageNoName = "MyPage_PageNo"
    end function

    public function GetPageSize()
        GetPageSize = MyPage_PageSize
    end function

    public function GetRecordTotal()
        GetRecordTotal = MyPage_RecordTotal
    end function



    private function FormatMyPage_TotalStrSql(strSql)
        FormatMyPage_TotalStrSql = "select count(*) as total "
        FormatMyPage_TotalStrSql = FormatMyPage_TotalStrSql  Mid(strSql,instr(strSql,"from"))
        FormatMyPage_TotalStrSql = Mid(FormatMyPage_TotalStrSql,1,instr(FormatMyPage_TotalStrSql"order by","order by")-1)
    end function

    private function FormatMyPage_StrSql(strSql)
        FormatMyPage_StrSql = replace(strSql,"select","select top "(MyPage_PageAbsolute*Cint(MyPage_PageSize)))
    end function

    private function MyPage_PageAbsoluteRequest()
        if request("MyPage_PageNo")="" then
            MyPage_PageAbsoluteRequest = 1
        else
            if IsNumeric(request("MyPage_PageNo")) then
                MyPage_PageAbsoluteRequest = request("MyPage_PageNo")
            else
                MyPage_PageAbsoluteRequest = 1
            end if
        end if
    end function

    private function ReadMyPage_Url()
        ReadMyPage_Url = Request.ServerVariables("URL")
        if Request.QueryString>"" then
            ReadMyPage_Url = ReadMyPage_Url  "?"  Request.QueryString
        end if
        set re = new RegExp
        re.Pattern = "[|?]MyPage_PageNo=\d+?"
        re.IgnoreCase = true
        re.multiLine = true
        re.global = true
        Set Matches = re.Execute(ReadMyPage_Url)
        For Each Match in Matches
            tmpMatch = Match.Value
            ReadMyPage_Url = replace(ReadMyPage_Url,tmpMatch,"")
        next
    end function
end Class

%>

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