Question: Difference between strMyVar and Session("strMyVar")

[VB Programmer]

If I have a variable I want to share in my application what is the
difference between just declaring a variable (Dim strMyVar as String) and
using a session variable (Session("strMyVar"))?

When should I use a session variable and when should I just declare it like
normal?

Thanks in advance!

[S. Justin Gengo]

When a user signs on to your website a unique session id is created for
them. This session id is stored on their computer as a cookie. When you
place an object into a session variable that object remains in server memory
between trips to the client and may be "reclaimed" from one page to the
next.

When you declare a variable on a per page basis such as: Dim strMyVar as
String the object is only persisted in memory while the page is built and
then destroyed after the output is sent to the client.

You should use regular variables whenever an object does not need to persist
beyond a single request to the server. And use session variables when you
need to reference an object from one request to the server to another.

I hope this helps.

--
S. Justin Gengo, MCP
Web Developer

Free code library at:
[url]www.aboutfortunate.com[/url]

"Out of chaos comes order."
Nietzche
"VB Programmer" <growNO-SPAM@go-intech.com> wrote in message
news:ONLW3GpWDHA.2284@TK2MSFTNGP10.phx.gbl...

> If I have a variable I want to share in my application what is the
> difference between just declaring a variable (Dim strMyVar as String) and
> using a session variable (Session("strMyVar"))?
>
> When should I use a session variable and when should I just declare it

like

> normal?
>
> Thanks in advance!
>
>

[VB Programmer]

Thanks for the great response!

So would you use session variables where you needed a "global" variable?

"S. Justin Gengo" <sjgengo@aboutfortunate.com> wrote in message
news:%235WsRLpWDHA.1640@TK2MSFTNGP10.phx.gbl...

> When a user signs on to your website a unique session id is created for
> them. This session id is stored on their computer as a cookie. When you
> place an object into a session variable that object remains in server

memory

> between trips to the client and may be "reclaimed" from one page to the
> next.
>
> When you declare a variable on a per page basis such as: Dim strMyVar as
> String the object is only persisted in memory while the page is built and
> then destroyed after the output is sent to the client.
>
> You should use regular variables whenever an object does not need to

persist

> beyond a single request to the server. And use session variables when you
> need to reference an object from one request to the server to another.
>
> I hope this helps.
>
> --
> S. Justin Gengo, MCP
> Web Developer
>
> Free code library at:
> [url]www.aboutfortunate.com[/url]
>
> "Out of chaos comes order."
> Nietzche
> "VB Programmer" <growNO-SPAM@go-intech.com> wrote in message
> news:ONLW3GpWDHA.2284@TK2MSFTNGP10.phx.gbl...

> > If I have a variable I want to share in my application what is the
> > difference between just declaring a variable (Dim strMyVar as String)

and

> > using a session variable (Session("strMyVar"))?
> >
> > When should I use a session variable and when should I just declare it

> like

> > normal?
> >
> > Thanks in advance!
> >
> >

>
>

[VB Programmer]

Thanks!

Is a cookie automatically created if I use session("xxx")? Or do I have to
enable something? (I do realize that the client has to have cookies enabled
on their end.)

"S. Justin Gengo" <sjgengo@aboutfortunate.com> wrote in message
news:eieMhXpWDHA.656@tk2msftngp13.phx.gbl...

> Exactly!
>
> There are also application variables. They are also global, but they are

not

> user specific. (i.e. If you set a session variable = 2 for one user and =

1

> for another, when each session variable is recalled on a server request

each

> user's session variable reflects their individual setting. An application
> level variable is the same for everyone. If user 1 sets it = 1 and then

user

> 2 sets it = 2 when user 1 makes a new request the application variable

will

> be = 2.)
>
> --
> S. Justin Gengo, MCP
> Web Developer
>
> Free code library at:
> [url]www.aboutfortunate.com[/url]
>
> "Out of chaos comes order."
> Nietzche
> "VB Programmer" <growNO-SPAM@go-intech.com> wrote in message
> news:%230KOfSpWDHA.2352@TK2MSFTNGP12.phx.gbl...

> > Thanks for the great response!
> >
> > So would you use session variables where you needed a "global" variable?
> >
> > "S. Justin Gengo" <sjgengo@aboutfortunate.com> wrote in message
> > news:%235WsRLpWDHA.1640@TK2MSFTNGP10.phx.gbl...

> > > When a user signs on to your website a unique session id is created

for

> > > them. This session id is stored on their computer as a cookie. When

you

> > > place an object into a session variable that object remains in server

> > memory

> > > between trips to the client and may be "reclaimed" from one page to

the

> > > next.
> > >
> > > When you declare a variable on a per page basis such as: Dim strMyVar

as

> > > String the object is only persisted in memory while the page is built

> and

> > > then destroyed after the output is sent to the client.
> > >
> > > You should use regular variables whenever an object does not need to

> > persist

> > > beyond a single request to the server. And use session variables when

> you

> > > need to reference an object from one request to the server to another.
> > >
> > > I hope this helps.
> > >
> > > --
> > > S. Justin Gengo, MCP
> > > Web Developer
> > >
> > > Free code library at:
> > > [url]www.aboutfortunate.com[/url]
> > >
> > > "Out of chaos comes order."
> > > Nietzche
> > > "VB Programmer" <growNO-SPAM@go-intech.com> wrote in message
> > > news:ONLW3GpWDHA.2284@TK2MSFTNGP10.phx.gbl...
> > > > If I have a variable I want to share in my application what is the
> > > > difference between just declaring a variable (Dim strMyVar as

String)

> > and

> > > > using a session variable (Session("strMyVar"))?
> > > >
> > > > When should I use a session variable and when should I just declare

it

> > > like
> > > > normal?
> > > >
> > > > Thanks in advance!
> > > >
> > > >
> > >
> > >

> >
> >

>
>

[S. Justin Gengo]

It's created automatically.

--
S. Justin Gengo, MCP
Web Developer

Free code library at:
[url]www.aboutfortunate.com[/url]

"Out of chaos comes order."
Nietzche
"VB Programmer" <growNO-SPAM@go-intech.com> wrote in message
news:e7naoopWDHA.1812@TK2MSFTNGP11.phx.gbl...

> Thanks!
>
> Is a cookie automatically created if I use session("xxx")? Or do I have

to

> enable something? (I do realize that the client has to have cookies

enabled

> on their end.)
>
> "S. Justin Gengo" <sjgengo@aboutfortunate.com> wrote in message
> news:eieMhXpWDHA.656@tk2msftngp13.phx.gbl...

> > Exactly!
> >
> > There are also application variables. They are also global, but they are

> not

> > user specific. (i.e. If you set a session variable = 2 for one user and

=

> 1

> > for another, when each session variable is recalled on a server request

> each

> > user's session variable reflects their individual setting. An

application

> > level variable is the same for everyone. If user 1 sets it = 1 and then

> user

> > 2 sets it = 2 when user 1 makes a new request the application variable

> will

> > be = 2.)
> >
> > --
> > S. Justin Gengo, MCP
> > Web Developer
> >
> > Free code library at:
> > [url]www.aboutfortunate.com[/url]
> >
> > "Out of chaos comes order."
> > Nietzche
> > "VB Programmer" <growNO-SPAM@go-intech.com> wrote in message
> > news:%230KOfSpWDHA.2352@TK2MSFTNGP12.phx.gbl...

> > > Thanks for the great response!
> > >
> > > So would you use session variables where you needed a "global"

variable?

> > >
> > > "S. Justin Gengo" <sjgengo@aboutfortunate.com> wrote in message
> > > news:%235WsRLpWDHA.1640@TK2MSFTNGP10.phx.gbl...
> > > > When a user signs on to your website a unique session id is created

> for

> > > > them. This session id is stored on their computer as a cookie. When

> you

> > > > place an object into a session variable that object remains in

server

> > > memory
> > > > between trips to the client and may be "reclaimed" from one page to

> the

> > > > next.
> > > >
> > > > When you declare a variable on a per page basis such as: Dim

strMyVar

> as

> > > > String the object is only persisted in memory while the page is

built

> > and

> > > > then destroyed after the output is sent to the client.
> > > >
> > > > You should use regular variables whenever an object does not need to
> > > persist
> > > > beyond a single request to the server. And use session variables

when

> > you

> > > > need to reference an object from one request to the server to

another.

> > > >
> > > > I hope this helps.
> > > >
> > > > --
> > > > S. Justin Gengo, MCP
> > > > Web Developer
> > > >
> > > > Free code library at:
> > > > [url]www.aboutfortunate.com[/url]
> > > >
> > > > "Out of chaos comes order."
> > > > Nietzche
> > > > "VB Programmer" <growNO-SPAM@go-intech.com> wrote in message
> > > > news:ONLW3GpWDHA.2284@TK2MSFTNGP10.phx.gbl...
> > > > > If I have a variable I want to share in my application what is the
> > > > > difference between just declaring a variable (Dim strMyVar as

> String)

> > > and
> > > > > using a session variable (Session("strMyVar"))?
> > > > >
> > > > > When should I use a session variable and when should I just

declare

> it

> > > > like
> > > > > normal?
> > > > >
> > > > > Thanks in advance!
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >

> >
> >

>
>