session is nothing

[Joel Brabant]

How can I know if a user session had timed out ?

I always get an error in my asp page when I try to access
my session variable if it timed out.

Thank You.

 

[Ray at]

What error? What code? Any time you hit your asp page, there's a session,
whether it's the same one that you had five seconds prior, or a new one.

Ray at work

 

[Joel Brabant]

The error is : object required....

The session has timed out.
For sure my session("blabla") is nothing... I know that.

But howcome it crashes when I use

If session("blabla") is nothing then
...
end if

!!!

Joel Brabant
Developer
Tembec Inc.

 

[Ray at]

Are you storing OBJECTS in session variables?

Ray at work

 

[Ray at]

P.S. Is Nothing only works on variables that have been defined as object
variables. i.e.

On Error Resume Next
Dim x
response.write "x is nothing?<br>"
Response.Write x is nothing
response.write "<br>" & err.description
err.clear
response.write "<hr>"


set x = createobject("adodb.connection")
response.write "x is now an object<br>"
response.write x is nothing
response.write err.description & "<br>"
err.clear
response.write "<hr>"


response.write "x has been destroyed<br>"
set x = nothing
response.write x is nothing
response.write err.description


If this were VB code and you did:
dim x as object

It wouldn't generate the error.

Ray at work




''that will gen

 

[Bob Barrows]

The error is : object required....

The session has timed out.
For sure my session("blabla") is nothing... I know that.

But howcome it crashes when I use

If session("blabla") is nothing then
..

Because, unless you are storing an object in session("blabla"),
session("blabla") will not be an object. Only objects can be Nothing.

I usually do this:

If len(session("blabla")) = 0 then

--
HTH,
Bob Barrows - Microsoft MVP -- ASP/ASP.NET
Please reply to the newsgroup. The email account listed in my From
header is my spam trap, so I don't check it very often. You will get a
quicker response by posting to the newsgroup.

 

[Joel Brabant]

Session("oAppUser") is in fact an object that was returned by my vb code
like this:

Set oAppTDE = Server.CreateObject("AppTDE.TDEManager")
Set Session("oAppUser")=oAppTDE.Login(cstr(sUsername),cstr(sPassword))
Set oAppTDE = Nothing

Don't worry ! I know, we are not suppose to store objects in session
variables....but that object has just a couple of properties that's it.

Thank you all for your help.

Joel Brabant
Developer
Tembec Inc.

 

[Bob Barrows]

Session("oAppUser") is in fact an object that was returned by my vb
code like this:

Set oAppTDE = Server.CreateObject("AppTDE.TDEManager")
Set Session("oAppUser")=oAppTDE.Login(cstr(sUsername),cstr(sPassword))
Set oAppTDE = Nothing

Don't worry ! I know, we are not suppose to store objects in session
variables....but that object has just a couple of properties that's
it.

What the object stores is not the problem. The problem is whether or not the
object is free-threaded. If it was created in VB, then it is not
free-threaded, and storing it in Session is not recommended.

So, you need to find out if the session variable exists, and if it does
exist, it will contain an object.

The first step is to use IsObject to determine if it is an object.

If IsObject(Session("oAppUser") then
if not Session("oAppUser") is nothing then


--
HTH,
Bob Barrows - Microsoft MVP -- ASP/ASP.NET
Please reply to the newsgroup. The email account listed in my From
header is my spam trap, so I don't check it very often. You will get a
quicker response by posting to the newsgroup.