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一段返回随机记录的代码
发表于：2007-06-30来源：作者：点击数：
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很久没用A CC ESS了，只是看到经常碰到有人问如何返回随机记录的问题，所以就贴了上来，随便看看。 !--#include virtual=/ado vb s.inc-- % Dim objConn Dim objRst Dim str SQL Dim strConnection Dim str Dim str1 Dim cnt Dim cnt1 Dim rndMax Dim RndNumb
很久没用ACCESS了，只是看到经常碰到有人问如何返回随机记录的问题，所以就贴了上来，随便看看。
<!--#include virtual="/adovbs.inc"-->
<%
Dim objConn
Dim objRst
Dim strSQL
Dim strConnection
Dim str
Dim str1
Dim cnt
Dim cnt1
Dim rndMax
Dim RndNumber
strConnection="driver={Microsoft Aclearcase/" target="_blank" >ccess Driver (*.mdb)};dbq=" & server.mappath("/testdb.mdb")
strSQL = "SELECT id FROM tblQuestions"
set objConn = Server.CreateObject("ADODB.Connection")
Set objRst = Server.CreateObject("ADODB.Recordset")
objConn.Open strConnection
set objRst.ActiveConnection = objConn
objRst.LockType = adLockOptimistic
objRst.CursorType = adOpenKeySet
objRst.Open strSQL
objRst.MoveLast
cnt = objRst.RecordCount
cnt1 = cnt
rndMax = cnt
If CInt(Request.Form("maxNumber")) < cnt Then
cnt1 = CInt(Request.Form("maxNumber"))
End If
str = ","
str1 = ","
Do Until cnt1 = 0
Randomize
RndNumber = Int(Rnd * rndMax)
If (InStr(1, str1, "," & RndNumber & "," ) = 0) Then
str1 = str1 & RndNumber & ","
cnt1 = cnt1 - 1
objRst.MoveFirst
objRst.Move RndNumber
str = str & objRst("id") & ","
End If
Loop
objRst.Close
Set objRst = Nothing
sql = "SELECT * FROM tblQuestions WHERE (((InStr(1,‘’" & str & "‘’,(‘’,‘’ & [id] & ‘’,‘’)))<>0)) "
Set objRst = Server.CreateObject("ADODB.Recordset")
set objRst.ActiveConnection = objConn
objRst.LockType = adLockOptimistic
objRst.CursorType = adOpenKeySet
objRst.Open sql
%>
...DISPLAY THE RECORDS RETURNED...
<%
objRst.Close
Set objRst = Nothing
objConn.Close
Set objConn = Nothing
%>
