VB .Net WebProject Variables

[dkalsow]

I am new to VB.Net WebProjects but have written VB.Net Projects for sometime. I am having problems with variables in my WebProjets. I dim them and I can use them but they do not keep there value. I have a timer that runs and each time the time if fired that value in the variable is back to what it was the time before, even though I have added 1 to it. Does any one have any idea why this is?

Thanks in advance.

Dale

[One Handed Man \( OHM - Terry Burns \)]

Re: VB .Net WebProject Variables

Where are you dimming this variable ?, dont forget once the page has been
rendered, the page object is unloaded on the server

Consider using the Session object to store this information in.

Session.Add(Key ,Value)


Having said all that, the right place to ask these questions in on ASPNET
newsgroup.

microsoft.publi c.dotnet.framew ork.aspnet



Regards - OHM ( Terry Burns )




"dkalsow" <dkalsow@discus sions.microsoft .com> wrote in message
news:036E73D4-EAA3-4053-AC37-C13E95A67821@mi crosoft.com...[color=blue]
> I am new to VB.Net WebProjects but have written VB.Net Projects for[/color]
sometime. I am having problems with variables in my WebProjets. I dim them
and I can use them but they do not keep there value. I have a timer that
runs and each time the time if fired that value in the variable is back to
what it was the time before, even though I have added 1 to it. Does any one
have any idea why this is?[color=blue]
>
> Thanks in advance.
>
> Dale[/color]

[Cor Ligthert]

Re: VB .Net WebProject Variables

> Having said all that, the right place to ask these questions in on ASPNET[color=blue]
> newsgroup.
>
> microsoft.publi c.dotnet.framew ork.aspnet[/color]

Why, has this to do installing the framework on the ASPNET server or has it
to do with using the VB.language in a webform application?

Cor

[One Handed Man \( OHM - Terry Burns \)]

Re: VB .Net WebProject Variables

Well, unless I have mistaken this, the OP is designing an ASP.NET
application. ServerControls reside on the IIS server, so the Framework has
to already be installed there.

Perhaps I just dont understand your question Cor.

Regards ( OHM - Terry Burns )

"Cor Ligthert" <notfirstname@p lanet.nl> wrote in message
news:%23y5sj8gU EHA.2972@TK2MSF TNGP12.phx.gbl. ..[color=blue][color=green]
> > Having said all that, the right place to ask these questions in on[/color][/color]
ASPNET[color=blue][color=green]
> > newsgroup.
> >
> > microsoft.publi c.dotnet.framew ork.aspnet[/color]
>
> Why, has this to do installing the framework on the ASPNET server or has[/color]
it[color=blue]
> to do with using the VB.language in a webform application?
>
> Cor
>
>[/color]

[Cor Ligthert]

Re: VB .Net WebProject Variables

Hi Terry,

It was in past often that when it was a little bit web, that the sentence
came in this newsgroup to have a look at aspnet. It can be because in the
German newsgroups there is as well an ASPNET entwickler (develloper)
newsgroup.

In my opinion is there not much difference when you are develloping for a
Windowservice, a windowform, a webform, a webservice, a windowclass or
whatever using Visual Studio Net.

For a Webform is the special thing as you stated in your answer, however for
the rest is beside using special controls almost nothing what is not the
same.

And therefore did you give in my opinion the right VB language answer,
although for this because it is so small was the alternative maybe the
viewstate maybe as well posible.

Therefore I think that when it has to do with the VB language this is the
right newsgroup, and now with your renewed expirience even more.

:-)

Cor

[One Handed Man \( OHM - Terry Burns \)]

Re: VB .Net WebProject Variables

Hi Cor,
Using ViewState will not work in this scenario, the reason
being that the Post will reset the ViewState even if its being changed with
a TimerClick on the server side. However, Session variables can be asjusted
by the timer.

See the following code to demonstrate. ( Assumes a Submit button present )
Note that the following code is using viewstate ( as you suggested ). Run it
this way first and see the results. Then comment out the ViewState lines and
use the session Key/Value Pairs in the Session object, and try submitting
again. You will see the counter is counting on the server while time
elapses. Submiting button will produces variable and increasing numbers
depening on the time lag.

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
'Put user code to initialize the page here
Timer1.Interval = 1000
Timer1.Start()

If Page.IsPostBack Then
'Response.Write (Session.Item(" C"))
Response.Write( ViewState("C"))
Else
'Session.Add("C ", 1)
ViewState.Add(" C", 1)
End If

End Sub

Private Sub Timer1_Elapsed( ByVal sender As System.Object, ByVal e As
System.Timers.E lapsedEventArgs ) Handles Timer1.Elapsed
'Session.Item(" C") += 1
Viewstate("C") += 1
End Sub
End Class


Hope that makes it clear.

Regards - OHM ( Terry Burns )



"Cor Ligthert" <notfirstname@p lanet.nl> wrote in message
news:enPgyohUEH A.704@TK2MSFTNG P09.phx.gbl...[color=blue]
> Hi Terry,
>
> It was in past often that when it was a little bit web, that the sentence
> came in this newsgroup to have a look at aspnet. It can be because in the
> German newsgroups there is as well an ASPNET entwickler (develloper)
> newsgroup.
>
> In my opinion is there not much difference when you are develloping for a
> Windowservice, a windowform, a webform, a webservice, a windowclass or
> whatever using Visual Studio Net.
>
> For a Webform is the special thing as you stated in your answer, however[/color]
for[color=blue]
> the rest is beside using special controls almost nothing what is not the
> same.
>
> And therefore did you give in my opinion the right VB language answer,
> although for this because it is so small was the alternative maybe the
> viewstate maybe as well posible.
>
> Therefore I think that when it has to do with the VB language this is the
> right newsgroup, and now with your renewed expirience even more.
>
> :-)
>
> Cor
>
>[/color]

[Cor Ligthert]

Re: VB .Net WebProject Variables

Hi Terry,

I changed your program, and that shows it even more, was for me it was
amazing. The system timer goes on and set the referenced object in the
session (and that can of course not in the viewstate).

I did not really look what was the problem when I wrote the first message,
however I saw something pointing on stateless and the session.

Thanks for letting me know, I did not know this.

However, this even shows more the truth from my other messages in this
thread.

:-)

Cor

\\\ beside the button it needs now 2 labels.
Private WithEvents timer1 As New System.Timers.T imer
Private Sub Page_Load(ByVal sender As System.Object, _
ByVal e As System.EventArg s) Handles MyBase.Load
'Put user code to initialize the page here
If Page.IsPostBack Then
Label1.Text = Session.Item("C ").ToString
Label2.Text = ViewState("C"). ToString
Else
timer1.Interval = 1000
timer1.Start()
Session.Add("C" , 1)
ViewState.Add(" C", 1)
End If
End Sub
Private Sub Timer1_Elapsed( ByVal sender As System.Object, _
ByVal e As System.Timers.E lapsedEventArgs ) Handles timer1.Elapsed
Session.Item("C ") = CInt(Viewstate( "C")) + 1
Viewstate.Item( "C") = CInt(Viewstate( "C")) + 1
End Sub
///