当前位置: 首页 > 图文教程 > 网络编程 > ASP > dreamweaverMX通用分页代码研究

ASP
asp中常用的文件处理函数
正确处理ASP动态网页中的容错机制
asp自动生成javascript检验函数
如何避免asp的SQL的执行效率低
编译asp应用程序成为exe文件
ASP完成小偷程序机制和简略示例
ASP技巧:rs.getrows方法
ASP简单实现数字字符混合验证码
ASP技巧 挂QQ的网页源代码ASP/PHP
ASP实例:用ASP判断文件地址是否有效
ASP实例:使用ASP生成图片彩色校验码
ASP如何跳出本次进入下一次循环
ASP读取数据库中数据到数组的类
为你的ASP程序作一个负载测试
如何用ASP来获取客户端真实IP的地址
asp脚本运行超时的解决办法
ASP缓存类 【先锋缓存类】Ver2004
ASP动态包含文件的改进方法
ASP中利用application实现缓存
ASP Application 对象用户手册

ASP 中的 dreamweaverMX通用分页代码研究


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-11-03   浏览: 104 ::
收藏到网摘: n/a

  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