ASP項目中的公用翻頁模組
在大型的ASP項目中,很多的頁面都涉及到翻頁功能。如果每個頁面都寫一個翻頁的程式的話,這樣的工作即降低了工作效率,也不利於工程的模組化,不能使代碼重用。因此,把翻頁這樣的功能模組化是很有必要的。
設計方法:
1、調用該模組時,只需要傳遞記錄集和每頁顯示的記錄的條數;
2、可以點選連結進行翻頁,也可以直接輸入頁碼,斷行符號後翻頁;
3、不要考慮檔案名稱,程式的每次翻頁都能在當前頁面。
想清楚了上面3個問題,我們的公用翻頁模組就可以動手了。
<%
'+++++++++++++++++++++++++++++++++++++
'◆模組名稱: 公用翻頁模組
'◆文 件 名: TurnPage.asp
'◆傳入參數: Rs_tmp (記錄集), PageSize (每頁顯示的記錄條數)
'◆輸 出: 記錄集翻頁顯示功能
'+++++++++++++++++++++++++++++++++++++
'
Sub TurnPage(ByRef Rs_tmp,PageSize) 'Rs_tmp 記錄集 ; PageSize 每頁顯示的記錄條數;
Dim TotalPage '總頁數
Dim PageNo '當前顯示的是第幾頁
Dim RecordCount '總記錄條數
Rs_tmp.PageSize = PageSize
RecordCount = Rs_tmp.RecordCount
TotalPage = INT(RecordCount / PageSize * -1)*-1
PageNo = Request.QueryString ("PageNo")
'直接輸入頁數跳轉;
If Request.Form("PageNo")<>"" Then PageNo = Request.Form("PageNo")
'如果沒有選擇第幾頁,則預設顯示第一頁;
If PageNo = "" then PageNo = 1
If RecordCount <> 0 then
Rs_tmp.AbsolutePage = PageNo
End If
'擷取當前檔案名稱,使得每次翻頁都在當前頁面進行;
Dim fileName,postion
fileName = Request.ServerVariables("script_name")
postion = InstrRev(fileName,"/")+1
'取得當前的檔案名稱,使翻頁的連結指向當前檔案;
fileName = Mid(fileName,postion)
%>
<table border=0 width='100%'>
<tr>
<td align=left> 總頁數:<font color=#ff3333><%=TotalPage%></font>頁
當前第<font color=#ff3333><%=PageNo%></font>頁</td>
<td align="right">
<%If RecordCount = 0 or TotalPage = 1 Then
Response.Write "首頁|前頁|後頁|末頁"
Else%>
<a href="<%=fileName%>?PageNo=1">首頁|</a>
<%If PageNo - 1 = 0 Then
Response.Write "前頁|"
Else%>
<a href="<%=fileName%>?PageNo=<%=PageNo-1%>">前頁|</a>
<%End If
If PageNo+1 > TotalPage Then
Response.Write "後頁|"
Else%>
<a href="<%=fileName%>?PageNo=<%=PageNo+1%>">後頁|</a>
<%End If%>
<a href="<%=fileName%>?PageNo=<%=TotalPage%>">末頁</a>
<%End If%></td>
<td width=95>轉到第
<%If TotalPage = 1 Then%>
<input type=text name=PageNo size=3 readonly disabled style="background:#d3d3d3">
<%Else%>
<input type=text name=PageNo size=3 value="" title=請輸入頁號,然後斷行符號>
<%End If%>頁
</td>
</tr>
</table>
<%End Sub%>
當然,大家可以把翻頁的連結做成圖片按鈕,這樣的話也面就更加美觀了。
調用方法:
1、在程式開始或要使用翻頁的地方包含翻頁模組檔案;
2、定義變數:RowCount,每頁顯示的記錄條數
3、調用翻頁過程:Call TurnPage(記錄集,RowCount)
4、在Do While 迴圈輸出記錄集的條件中加上" RowCount > 0 " 條件
5、在迴圈結束 "Loop前" 加上: RowCount = RowCount - 1
'-----------------------------------------------------
調用範例:
檔案名稱:News.asp
<%
Dim Conn,Rs_News
Set Conn = server.CreateObject("ADODB.CONNECTION")
Conn.Open "cpm","cpm","cpm"
Dim Sql
Sql = "Select * from News"
Set Rs_News = Server.CreateObject("ADODB.RECORDSET")
Rs_News.Open Sql,Conn,1,3 '擷取的記錄集
'公用翻頁模組開始%>
<!--#include file=../Public/TurnPage.asp-->
<%
Dim RowCount
RowCount = 10 '每頁顯示的記錄條數
Call TurnPage(Rs_News,RowCount)
'公用翻頁模組結束%>
<table width=100%>
<tr>
<td>新聞編號</td>
<td>新聞標題</td>
<td>發布日期</td>
<tr>
<%
If Not Rs_News.eof
Do while Not Rs_News.eof and RowCount>0
%>
<tr>
<td><%=Rs_News("ID")%></td>
<td><%=Rs_News("Name")%></td>
<td><%=Rs_News("Date")%></td>
<tr>
<%
RowCount = RowCount - 1
Rs_News.MoveNext
Loop
End If
%>
<%sub list_page(TotalRec,PageSize)
'TotalTec:總記錄數
'PageSize:每頁顯示多少條記錄
TotalPage=Fix((TotalRec-1)/PageSize)+1 '得到總頁數
CurrentPage=Request("page") '獲得當前頁
if CurrentPage="" or not isInteger(CurrentPage) then
CurrentPage=1
else
CurrentPage=clng(CurrentPage)
end if
P=(CurrentPage-1) /10
response.write"<form method=GET>頁次:<b>"& CurrentPage &"</b>/<b>"& TotalPage &"</b>頁 每頁<b>"&PageSize&"</b> 總記錄:<b>"& TotalRec &"</b></td>"&_
"<td valign=middle><div align=right >分頁:"
if CurrentPage=1 then
response.write "<font face=webdings color=red>9</font>"
else
response.write "<a href='?page=1"' title=首頁><font face=webdings>9</font></a> "
end if
if p*10>0 then response.write "<a href='?page="&Cstr(p*10)&"' title=上10頁><font face=webdings>7</font></a> "
response.write "<b>"
for ii=p*10+1 to P*10+10
if ii=currentPage then
response.write "<font color=red>"+Cstr(ii)+"</font> "
else
response.write "<a href='?page="&Cstr(ii)&"'>"+Cstr(ii)+"</a> "
end if
if ii=TotalPage then exit for
next
response.write "</b>"
if ii<n then response.write "<a href='?page="&Cstr(ii)&"' title=下十頁><font face=webdings>8</font></a> "
if currentPage=TotalPage then
response.write "<font face=webdings color=red>:</font> "
else
response.write "<a href='?page="&Cstr(TotalPage)&"' title=尾頁><font face=webdings>:</font></a> "
end if
response.write "轉到:<input type=text name=Page size=3 maxlength=10 value="& currentpage &"><input type=button value=Go name=submit></form>"
end sub%>
'ASP通用翻頁函數 作者:天地小子 2005.7.7 twt326@163.com
'輸入查詢語句,資料庫名,資料庫連接,當前頁號,連結字串,列表條數,查詢條件(預設為空白)
'顯示上下頁導航連結,有下拉框顯示頁數
'這個函數是根據天地PHP通用翻頁函數1直接轉變的,其中使用了CSDN BBS上一個大蝦的SQL高效分頁方案技術
':)由於這裡沒有找到那篇文章,所以老兄請勿見怪了。配合下面的函數使用起來更方便
sub getnav(dbname,conn,tnowpage,link,pagelistnum,wherewords)
dim sql,trst,sumrows,pagesum,tmphead,showdown,selectcode,i
sql="select count(*) as recnum from "&dbname
if wherewords<>"" then sql=sql & " where " & wherewords
set trst=Server.CreateObject("adodb.recordset")
trst.open sql,conn,1,1
sumrows=trst("recnum")
pagesum=sumrows\pagelistnum+1
if sumrows mod pagelistnum=0 then pagesum=sumrows/pagelistnum
tmphead="<a href="&link&"&page="
if cint(tnowpage)<2 then
showdown="<table><form name='selform' method='post' action=''><tr><td>首頁 上頁 "
else
showdown="<table><form name='selform' method='post' action=''><tr><td>"&tmphead&"1>首頁</a> "&tmphead&(tnowpage-1)&">上頁</a> "
end if
if cint(tnowpage)<cint(pagesum) then
showdown=showdown&tmphead&(tnowpage+1)&">下頁</a> "&tmphead&pagesum&">末頁</a> "
else
showdown=showdown&"下頁 末頁 "
end if
'擷取下拉框轉向代碼
selectcode="<script language='javascript'>function gopagenav(page){ location='"&link&"&page='+page; }</script><select name='selpage' id='selpage' onChange='javascript:gopagenav(this.value);'>"
for i=1 to pagesum
selectcode=selectcode&"<option value='"&i&"'"
if cInt(i)=cint(tnowpage) then selectcode=selectcode&" selected"
selectcode=selectcode&">= "&i&" =</option>"
next
selectcode=selectcode&"</select>"
showdown=showdown&"第</td><td>"&selectcode&"</td><td>頁,共"&pagesum&"頁 總記錄數:"&sumrows&"</td></tr></form></table>"
response.write showdown
trst.close
set trst=nothing
end sub
'根據參數產生查詢語句,查詢某頁資料
'參數:當前頁,每頁顯示條數,資料表名(多個用逗號隔開),需要選擇的欄位名(用逗號隔開),查詢條件(無條件時為空白字串),ID主鍵,排序方式(ASC正序或DESC倒序)
'使用樣本
' sql=getfysql(page,pagelistnum,"tbl_message,tbl_login","tbl_message.*,tbl_login.l_user","tbl_message.m_lid=tbl_login.l_id","m_id","DESC")
' getnav "tbl_message",conn,page,"adminmessage.asp?act=",pagelistnum,addnavwords
function getfysql(tnowpage,tpagelistnum,tblname,selfields,wherewords,keyfield,sorttype)
dim fh,hs
if wherewords="" then wherewords="1=1"
fh=">":hs="max"
if sorttype="DESC" then
fh="<"
hs="min"
end if
if (tnowpage-1)*tpagelistnum=0 then
sql="select top "&tpagelistnum&" "&selfields&" from "&tblname&" where "&wherewords&" order by "&keyfield&" "&sorttype
else
sql="select top "&tpagelistnum&" "&selfields&" from "&tblname&" where "&wherewords& " and " &keyfield&fh&"(select "&hs&"("&keyfield&") from (select top "&((tnowpage-1)*tpagelistnum)&" "&keyfield&" from "&tblname&" where "&wherewords& " order by "&keyfield&" "&sorttype&") as T) order by "&keyfield&" "&sorttype
end if
getfysql=sql
end function