<%
sessionID=session.SessionID
timeout=5
‘
设置session保持的时间
.
Conn_String=”DRIVER={Microsoft Access Driver (*.mdb)};DBQ=” & Server.MapPath(“count.mdb”)
‘Conn_String=”activeUser”
‘
最好设置DSN=”activeuser”,因为我们需要在所有的ASP脚本中包含这个文件
.
Set ConnCount=Server.CreateObject(“ADODB.Connection”)
ConnCount.Open Conn_String
aaa=dateadd(“n”, -timeout, now())
connCount.Execute (“delete * from count where postdate < #” & aaa & “#”)
‘
在超时后删除
session.
sql0=”select sess from count where sess='” & sessionID & “‘”
‘ 保持
sessionID.
set rscheck=connCount.Execute (sql0)
if rscheck.eof then
sql=”insert into count (sess,postdate) values(‘” & sessionID & “‘, ‘” & now() & “‘)”
connCount.Execute (sql)
end if
rscheck.close
set rscheck=nothing
sql2=”select count(sess) from count”
‘ 计算
sessionID.
set rs=connCount.Execute (sql2)
count=rs(0)
rs.close
set rs=nothing
sql3=”select * from count”
set rspredel=connCount.Execute (sql3)
do until rspredel.eof
xxx=DateDiff(“n”, rspredel(“postdate”), Now())
if xxx > timeout then
count=count-1
end if
rspredel.movenext
loop
rspredel.close
set rspredel=nothing
connCount.Close
set connCount=nothing
if count=0 then
count=1
end if
%>
当前正有<%=count%>人在随风起舞流连忘返!
[1]