不用global.asa实现在线人数统计_asp技巧

<%
count online user without using Global.asa
script by Narong Khotarasakit
webmaster of ezebox.com
report bug : info@ezebox.com

sessionID = session.SessionID
timeout = 5
set how long to keep this session in minute you can increase this number

Conn_String = "DRIVER={Microsoft Access Driver (*.mdb)};DBQ=" & Server.MapPath("count.mdb")
Conn_String = "activeUser"
set your DSN = "activeuser" is a better way because you need include this file to all your asp scripts.

Set ConnCount =Server.CreateObject("ADODB.Connection")
ConnCount.Open Conn_String

delete session after timeout
aaa = dateadd("n", -timeout, now())
connCount.Execute ("delete * from count where postdate < #" & aaa & "#")

keep sessionID
sql0 = "select sess from count where sess=" & 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

count sessionID
sql2 = "select count(sess) from count"
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
%>

<%=count%> Active users