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dreamweaverMX已经正式发布了，Deamweaver4 + Deamweaver ULTRADEV 4 的组合使他成为当然的制做网页的首选工具，（好象做广告：） ) 好了，进入正题， 我在以前做网页的分页时候都是用自己写的服务端脚本(我从不用ADO的分页)，用了MX后发现在这里面用分页太方便了，不过代码也有点太长了，大家看下面的代码就可以知道。用过之后我发现里面recordset 的cursortype设为0分页竟然可以正常工作！这令我吃惊不少，分析了代码之后才发现MX 是用了一种挺笨的方式实现的，效率很低，所以大家还是用1吧：） 分析如下: <%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%> <!--#include file="Connections/ncarcnn.asp" --> <% Dim Recordset1 Dim Recordset1_numRows Set Recordset1 = Server.CreateObject("ADODB.Recordset") Recordset1.ActiveConnection = MM_ncarcnn_STRING Recordset1.Source = "SELECT * FROM dbo.ncarinfo" Recordset1.CursorType = 0 \\\'这里用0也可以正常运行，但是经过分析代码可以看出，用0的效率很低，建议用1 Recordset1.CursorLocation = 2 Recordset1.LockType = 1 Recordset1.Open() Recordset1_numRows = 0 %> <% \\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\'\\\' \\\'以下为分页代码 Dim Repeat1__numRows Dim Repeat1__index Repeat1__numRows = 10 Repeat1__index = 0 Recordset1_numRows = Recordset1_numRows + Repeat1__numRows %> <% \\\' *** Recordset状态, 定义状态变量 Dim Recordset1_total Dim Recordset1_first Dim Recordset1_last \\\' set the record count Recordset1_total = Recordset1.RecordCount \\\' set the number of rows displayed on this page If (Recordset1_numRows < 0) Then Recordset1_numRows = Recordset1_total Elseif (Recordset1_numRows = 0) Then Recordset1_numRows = 1 End If \\\' set the first and last displayed record Recordset1_first = 1 Recordset1_last = Recordset1_first + Recordset1_numRows - 1 \\\' if we have the correct record count, check the other stats 处理准确的rs If (Recordset1_total <> -1) Then If (Recordset1_first > Recordset1_total) Then Recordset1_first = Recordset1_total End If If (Recordset1_last > Recordset1_total) Then Recordset1_last = Recordset1_total End If If (Recordset1_numRows > Recordset1_total) Then Recordset1_numRows = Recordset1_total End If End If %> <% \\\' *** Recordset Stats: if we don\\\'t know the record count, manually count them处理错误的RS If (Recordset1_total = -1) Then \\\' count the total records by iterating through the recordset Recordset1_total=0 While (Not Recordset1.EOF) Recordset1_total = Recordset1_total + 1 Recordset1.MoveNext Wend \\\' reset the cursor to the beginning If (Recordset1.CursorType > 0) Then Recordset1.MoveFirst Else Recordset1.Requery End If \\\' set the number of rows displayed on this page If (Recordset1_numRows < 0 Or Recordset1_numRows > Recordset1_total) Then Recordset1_numRows = Recordset1_total End If \\\' set the first and last displayed record Recordset1_first = 1 Recordset1_last = Recordset1_first + Recordset1_numRows - 1 If (Recordset1_first > Recordset1_total) Then Recordset1_first = Recordset1_total End If If (Recordset1_last > Recordset1_total) Then Recordset1_last = Recordset1_total End If End If %> <% Dim MM_paramName %> <% \\\' *** Move To Record and Go To Record: declare variables Dim MM_rs Dim MM_rsCount Dim MM_size Dim MM_uniqueCol Dim MM_offset Dim MM_atTotal Dim MM_paramIsDefined Dim MM_param Dim MM_index Set MM_rs = Recordset1 MM_rsCount = Recordset1_total MM_size = Recordset1_numRows MM_uniqueCol = "" MM_paramName = "" MM_offset = 0 MM_atTotal = false MM_paramIsDefined = false If (MM_paramName <> "") Then MM_paramIsDefined = (Request.QueryString(MM_paramName) <> "") End If %> <% \\\' *** Move To Record: handle \\\'index\\\' or \\\'offset\\\' parameter if (Not MM_paramIsDefined And MM_rsCount <> 0) then \\\' use index parameter if defined, otherwise use offset parameter MM_param = Request.QueryString("index") If (MM_param = "") Then MM_param = Request.QueryString("offset") End If If (MM_param <> "") Then MM_offset = Int(MM_param) End If \\\' if we have a record count, check if we are past the end of the recordset If (MM_rsCount <> -1) Then If (MM_offset >= MM_rsCount Or MM_offset = -1) Then \\\' past end or move last If ((MM_rsCount Mod MM_size) > 0) Then \\\' last page not a full repeat region MM_offset = MM_rsCount - (MM_rsCount Mod MM_size) Else MM_offset = MM_rsCount - MM_size End If End If End If \\\' move the cursor to the selected record MM_index = 0 While ((Not MM_rs.EOF) And (MM_index < MM_offset Or MM_offset = -1)) MM_rs.MoveNext MM_index = MM_index + 1 Wend If (MM_rs.EOF) Then MM_offset = MM_index \\\' set MM_offset to the last possible record End If End If %> <% \\\' *** Move To Record: if we dont know the record count, check the display range If (MM_rsCount = -1) Then \\\' walk to the end of the display range for this page MM_index = MM_offset While (Not MM_rs.EOF And (MM_size < 0 Or MM_index < MM_offset + MM_size)) MM_rs.MoveNext MM_index = MM_index + 1 Wend \\\' if we walked off the end of the recordset, set MM_rsCount and MM_size If (MM_rs.EOF) Then MM_rsCount = MM_index If (MM_size < 0 Or MM_size > MM_rsCount) Then MM_size = MM_rsCount End If End If \\\' if we walked off the end, set the offset based on page size If (MM_rs.EOF And Not MM_paramIsDefined) Then If (MM_offset > MM_rsCount - MM_size Or MM_offset = -1) Then If ((MM_rsCount Mod MM_size) > 0) Then MM_offset = MM_rsCount - (MM_rsCount Mod MM_size) Else MM_offset = MM_rsCount - MM_size End If End If End If \\\' reset the cursor to the beginning If (MM_rs.CursorType > 0) Then MM_rs.MoveFirst Else MM_rs.Requery End If \\\' move the cursor to the selected record MM_index = 0 While (Not MM_rs.EOF And MM_index < MM_offset) MM_rs.MoveNext MM_index = MM_index + 1 Wend End If %> <% \\\' *** Move To Record: update recordset stats \\\' set the first and last displayed record Recordset1_first = MM_offset + 1 Recordset1_last = MM_offset + MM_size If (MM_rsCount <> -1) Then If (Recordset1_first > MM_rsCount) Then Recordset1_first = MM_rsCount End If If (Recordset1_last > MM_rsCount) Then Recordset1_last = MM_rsCount End If End If \\\' set the boolean used by hide region to check if we are on the last record MM_atTotal = (MM_rsCount <> -1 And MM_offset + MM_size >= MM_rsCount) %> <% \\\' *** Go To Record and Move To Record: create strings for maintaining URL and Form parameters Dim MM_keepNone Dim MM_keepURL Dim MM_keepForm Dim MM_keepBoth Dim MM_removeList Dim MM_item Dim MM_nextItem \\\' create the list of parameters which should not be maintained MM_removeList = "&index=" If (MM_paramName <> "") Then MM_removeList = MM_removeList & "&" & MM_paramName & "=" End If MM_keepURL="" MM_keepForm="" MM_keepBoth="" MM_keepNone="" \\\' add the URL parameters to the MM_keepURL string For Each MM_item In Request.QueryString MM_nextItem = "&" & MM_item & "=" If (InStr(1,MM_removeList,MM_nextItem,1) = 0) Then MM_keepURL = MM_keepURL & MM_nextItem & Server.URLencode(Request.QueryString(MM_item)) End If Next \\\' add the Form variables to the MM_keepForm string For Each MM_item In Request.Form MM_nextItem = "&" & MM_item & "=" If (InStr(1,MM_removeList,MM_nextItem,1) = 0) Then MM_keepForm = MM_keepForm & MM_nextItem & Server.URLencode(Request.Form(MM_item)) End If Next \\\' create the Form + URL string and remove the intial \\\'&\\\' from each of the strings MM_keepBoth = MM_keepURL & MM_keepForm If (MM_keepBoth <> "") Then MM_keepBoth = Right(MM_keepBoth, Len(MM_keepBoth) - 1) End If If (MM_keepURL <> "") Then MM_keepURL = Right(MM_keepURL, Len(MM_keepURL) - 1) End If If (MM_keepForm <> "") Then MM_keepForm = Right(MM_keepForm, Len(MM_keepForm) - 1) End If \\\' a utility function used for adding additional parameters to these strings Function MM_joinChar(firstItem) If (firstItem <> "") Then MM_joinChar = "&" Else MM_joinChar = "" End If End Function %> <% \\\' *** Move To Record: set the strings for the first, last, next, and previous links Dim MM_keepMove Dim MM_moveParam Dim MM_moveFirst Dim MM_moveLast Dim MM_moveNext Dim MM_movePrev Dim MM_urlStr Dim MM_paramList Dim MM_paramIndex Dim MM_nextParam MM_keepMove = MM_keepBoth MM_moveParam = "index" \\\' if the page has a repeated region, remove \\\'offset\\\' from the maintained parameters If (MM_size > 1) Then MM_moveParam = "offset" If (MM_keepMove <> "") Then MM_paramList = Split(MM_keepMove, "&") MM_keepMove = "" For MM_paramIndex = 0 To UBound(MM_paramList) MM_nextParam = Left(MM_paramList(MM_paramIndex), InStr(MM_paramList(MM_paramIndex),"=") - 1) If (StrComp(MM_nextParam,MM_moveParam,1) <> 0) Then MM_keepMove = MM_keepMove & "&" & MM_paramList(MM_paramIndex) End If Next If (MM_keepMove <> "") Then MM_keepMove = Right(MM_keepMove, Len(MM_keepMove) - 1) End If End If End If \\\' set the strings for the move to links If (MM_keepMove <> "") Then MM_keepMove = MM_keepMove & "&" End If MM_urlStr = Request.ServerVariables("URL") & "?" & MM_keepMove & MM_moveParam & "=" MM_moveFirst = MM_urlStr & "0" MM_moveLast = MM_urlStr & "-1" MM_moveNext = MM_urlStr & CStr(MM_offset + MM_size) If (MM_offset - MM_size < 0) Then MM_movePrev = MM_urlStr & "0" Else MM_movePrev = MM_urlStr & CStr(MM_offset - MM_size) End If %> <html> <head> <title>Untitled Document</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> </head> <body> <p></p> <table border="1"> <tr> <td>cpno</td> <td>cbno</td> <td>cdpt</td> <td>cid</td> <td>cbnm</td> <td>ddate</td> <td>cstate</td> <td>guid</td> </tr> <% While ((Repeat1__numRows <> 0) AND (NOT Recordset1.EOF)) %> <tr> <td><%=(Recordset1.Fields.Item("cpno").Value)%></td> <td><%=(Recordset1.Fields.Item("cbno").Value)%></td> <td><%=(Recordset1.Fields.Item("cdpt").Value)%></td> <td><%=(Recordset1.Fields.Item("cid").Value)%></td> <td><%=(Recordset1.Fields.Item("cbnm").Value)%></td> <td><%=(Recordset1.Fields.Item("ddate").Value)%></td> <td><%=(Recordset1.Fields.Item("cstate").Value)%></td> <td><%=(Recordset1.Fields.Item("guid").Value)%></td> </tr> <% Repeat1__index=Repeat1__index+1 Repeat1__numRows=Repeat1__numRows-1 Recordset1.MoveNext() Wend %> </table> <p> </p> <table border="0" width="50%" align="center"> <tr> <td width="23%" align="center"> <% If MM_offset <> 0 Then %> <a href="<%=MM_moveFirst%>"><img src="First.gif" border=0></a> <% End If \\\' end MM_offset <> 0 %> </td> <td width="31%" align="center"> <% If MM_offset <> 0 Then %> <a href="<%=MM_movePrev%>"><img src="Previous.gif" border=0></a> <% End If \\\' end MM_offset <> 0 %> </td> <td width="23%" align="center"> <% If Not MM_atTotal Then %> <a href="<%=MM_moveNext%>"><img src="Next.gif" border=0></a> <% End If \\\' end Not MM_atTotal %> </td> <td width="23%" align="center"> <% If Not MM_atTotal Then %> <a href="<%=MM_moveLast%>"><img src="Last.gif" border=0></a> <% End If \\\' end Not MM_atTotal %> </td> </tr> </table> Records <%=(Recordset1_first)%> to <%=(Recordset1_last)%> of <%=(Recordset1_total)%> </body> </html> <% Recordset1.Close() Set Recordset1 = Nothing %> 返回类别: 教程 上一教程: JMAIL.MESSAGE 下一教程: ASP中函数调用对参数的影响 您可以阅读与"DREAMWEAVERMX通用分页代码研究"相关的教程: · 一个分页代码例子 · ASP分页代码，已经写成类了，值得参考 · ASP通用分页类 · 通用分页的存储过程函数 · 创建一个ASP通用分页类 |
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