dreamweaverMX通用分页代码研究
dreamweaverMX通用分页代码研究,dreamweaverMX通用分页代码研究
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: d