<%
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!
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