lifetime of variables

[Peter]

Hi can someone help me
I declare a variable to a certain value in the form.aspx.vb page an then
run the application, then I push a serverbutton to reload the page and give
a new value to the variable. but every time I reload the page it is set to
the first value. Does a variable not keep the value ? I thought the object
was alive until session ends.

Dim currentItem As Integer 'this is the dim section at top

Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Handles btnNext.Click
currentItem = currentItem + 1
txtData.Text = currentItem 'here it is 1 everyme i reload the page
End Sub

Peter

[Patrice Scribe]

See
http://msdn.microsoft.com/library/de...us/cpguide/htm
l/cpconcontrolexecutionlifecycle.asp for the lifecycle.

What about

txtData.Text=CLng(txtDate.Text)+1 ?

--

"Peter" <vb.@127.0.0.1> a écrit dans le message de news:
3edf0f4d$1@tnews.web.devx.com...
>
>
> Hi can someone help me
> I declare a variable to a certain value in the form.aspx.vb page an then
> run the application, then I push a serverbutton to reload the page and
give
> a new value to the variable. but every time I reload the page it is set to
> the first value. Does a variable not keep the value ? I thought the object
> was alive until session ends.
>
> Dim currentItem As Integer 'this is the dim section at top
>
> Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs)
> Handles btnNext.Click
> currentItem = currentItem + 1
> txtData.Text = currentItem 'here it is 1 everyme i reload the page
> End Sub
>
> Peter
>
>

[Peter]

Thanks but..
txtData.text is still 0 when i have reloaded the page. The only way I can
think about is using a session variable.....and it works, I have tried, but
I still wonder if that's the only way?

Peter

"Patrice Scribe" <scribe@chez.com> wrote:
>See
>http://msdn.microsoft.com/library/de...us/cpguide/htm
>l/cpconcontrolexecutionlifecycle.asp for the lifecycle.
>
>What about
>
>txtData.Text=CLng(txtDate.Text)+1 ?
>
>--
>
>"Peter" <vb.@127.0.0.1> a écrit dans le message de news:
>3edf0f4d$1@tnews.web.devx.com...
>>
>>
>> Hi can someone help me
>> I declare a variable to a certain value in the form.aspx.vb page an then
>> run the application, then I push a serverbutton to reload the page and
>give
>> a new value to the variable. but every time I reload the page it is set
to
>> the first value. Does a variable not keep the value ? I thought the object
>> was alive until session ends.
>>
>> Dim currentItem As Integer 'this is the dim section at top
>>
>> Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As
>System.EventArgs)
>> Handles btnNext.Click
>> currentItem = currentItem + 1
>> txtData.Text = currentItem 'here it is 1 everyme i reload the
page
>> End Sub
>>
>> Peter
>>
>>
>

[Phil Weber]

> The only way I can think about is using a session variable...
> and it works, I have tried, but I still wonder if that's the
> only way?

Peter: It's not the only way. You can also use ViewState, or the Cache
object, or a cookie, or a hidden form field, or a QueryString value, or a
database. But you need to save the value somewhere and pass it back with the
next request, otherwise your code has no way of knowing that the subsequent
request is related in any way to the previous one.

You may find the following articles helpful:

http://www.fawcette.com/dotnetmag/20...online/bolges/
http://www.softartisans.com/softarti...per-utley.html

--
Phil Weber

[Patrice Scribe]

On the web you start fresh with each request but ASP.NET is able to gives
the "illusion of continuity".

Check out the viewstate property of the "txtData" control. The framework
should be able to automatically save/restore the control value (of course it
can't do this automatically for plain old variables). Make sure also to
initialize the value if needed.
--

"Peter" <vb.@127.0.0.1> a écrit dans le message de news:
3edf379b$1@tnews.web.devx.com...
>
> Thanks but..
> txtData.text is still 0 when i have reloaded the page. The only way I can
> think about is using a session variable.....and it works, I have tried,
but
> I still wonder if that's the only way?
>
> Peter
>
> "Patrice Scribe" <scribe@chez.com> wrote:
> >See
>
>http://msdn.microsoft.com/library/de...-us/cpguide/ht
m
> >l/cpconcontrolexecutionlifecycle.asp for the lifecycle.
> >
> >What about
> >
> >txtData.Text=CLng(txtDate.Text)+1 ?
> >
> >--
> >
> >"Peter" <vb.@127.0.0.1> a écrit dans le message de news:
> >3edf0f4d$1@tnews.web.devx.com...
> >>
> >>
> >> Hi can someone help me
> >> I declare a variable to a certain value in the form.aspx.vb page an
then
> >> run the application, then I push a serverbutton to reload the page and
> >give
> >> a new value to the variable. but every time I reload the page it is set
> to
> >> the first value. Does a variable not keep the value ? I thought the
object
> >> was alive until session ends.
> >>
> >> Dim currentItem As Integer 'this is the dim section at top
> >>
> >> Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As
> >System.EventArgs)
> >> Handles btnNext.Click
> >> currentItem = currentItem + 1
> >> txtData.Text = currentItem 'here it is 1 everyme i reload the
> page
> >> End Sub
> >>
> >> Peter
> >>
> >>
> >
>