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法实现的，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 处理正确的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
