Classic ASP Discussion - session problem

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session problem

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Category: General Discussion
Forum Name: Classic ASP Discussion
Forum Description: Discussion on Active Server Pages (Classic ASP).
URL: https://forums.webwiz.net/forum_posts.asp?TID=7063
Printed Date: 29 March 2026 at 3:46pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com

Topic: session problem

Posted By: brolinuk
Subject: session problem
Date Posted: 06 November 2003 at 7:41pm

I want to identify whether user has logged in, in order to give them different authority. I know how to use queryString, but I don't like it, as some parameter will display on the URL bar.... I tried to use sessions. I defined Session("Username") in the login.asp file and use the following code to check whether it has got parameter. If it is true it means user has logged in already.

If IsNull(Session("Username")) = False then

However, the result is always to be true, even the username actually dosen't have a value. Anyboy please give me some help to solve this problem. thanks

Replies:

Posted By: MorningZ
Date Posted: 06 November 2003 at 8:27pm

try

If Trim(Session("Username")) <> "" then

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Posted By: brolinuk
Date Posted: 06 November 2003 at 9:16pm

Thanks MorningZ! It is works!

Where would I be able to find out the detailed reference of asp, such as "Trim" you used

Posted By: zaboss
Date Posted: 06 November 2003 at 11:33pm

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/vtorifunctions.asp - Here.

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Cristian Banu
http://www.soft4web.ro - Soft 4 web

Posted By: MorningZ
Date Posted: 07 November 2003 at 5:05am

i typically avoid MSDN's site like the plague... but its a good resource

better ones IMHO would be http://www.devguru.com - devguru (VBScript link, their javascript section is also excellent) and http://www.w3schools.com - w3schools (learn ASP)... also make sure to check out the http://forums.webwiz.net/forum_posts.asp?TID=55&PN=1 - "Favortie ASP Help Pages" thread that i stickied at the top of this very ASP forum

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Posted By: MorningZ
Date Posted: 07 November 2003 at 5:08am

oh yeah also... and this is just advice from me, i don't expect others to agree....

but i HATE dealing with "empty" or "NULL" so i have a function that treats them the same and i include it in a "common" page that gets included on all pages

Function CstrNull( i_val )
CstrNull = Trim(Cstr("" & i_val))
End Function

that'll return "" for anything null or empty, so most my "checks" are

If CstrNull( whatever_i_am_checking ) <> "" then
...etc etc...

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