Re: session variable issue?

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From: Mike (Mike_at_discussions.microsoft.com)
Date: 10/11/04 

Date: Mon, 11 Oct 2004 08:27:05 -0700

they are on the same page for the reason being that I need to post back to
myself to get the users selection from the datalist, then pass only the items
selected to the detail page via a querystring. ( in which i'm also have an
issue with in .NET with this particular one.)

here is the button code snippet
For I = 0 To datalist.Items.Count - 1
            checkBox= dlScores.Items(I).FindControl("chkCars")
            carMake= dlScores.Items(I).FindControl("carmake")
            cbValue = cbValue & checkbox.Checked.ToString()
            If checkbox.Checked.ToString = True Then
                 carMake= carMake & carmake.Text.ToString() & "|"
            End If
        Next
      response.redirect("cardetails.aspx?car=" & carMake)

this is the function that loops thru the datalist and gets me all the cars
selected then pass only them to the detail page.

Is there an easier way to do this? I only want this to fire when the button
is clicked by the user. Also with the querystring if i have the string
seperated with | it will not work, even if i split the string. though it will
work if i remove the | and only select one car in the datalist

"William F. Robertson, Jr." wrote:

> Mike,
>
> Are these code snippets on the same page? If so, then it will not work this
> way. The Button click event is fired after Page_Load. So the session will
> be Nothing as it has not been set yet. Typically you would show action is
> response to a Button Click event, or you can just check the CheckBox
> directly in page load, depending on what else you have going during your
> page execution.
>
> If the code is on two different pages, how are you transfering the user to
> the other page. Response.Redirect, Server.Transfer, Execute?
>
> bill
>
> "Mike" <Mike@discussions.microsoft.com> wrote in message
> news:29FB60B4-3881-49A2-8AAB-0A00B4FD907A@microsoft.com...
> > I made the change you requested but i'm still having the same issue?
> >
> > the session varaible is coming back blank
> >
> > on the page where i'm setting the variable.
> > sub page_load
> > if page.ispostback then
> > if session("selection") = "Y" then 'this is sitll coming back as
> > nothing
> > response.write("You selected the following" & " " & cars)
> > end if
> > end if
> >
> > im the button click routine
> > if CurrentCheckBox.Checked = True Then
> > Dim cars As String
> > selectedCars= "Y"
> > Session("selection") = selectedCars
> > End If
> >
> >
> >
> > "William F. Robertson, Jr." wrote:
> >
> > > You are never assigning Session("Selection") to anything.
> > >
> > > You are setting the string "cars" to 'Y', but since never assign the
> Session
> > > it will not work the way you want. I can give a more detailed
> explaination
> > > if you need one, but for now reverse your code like so:
> > >
> > > 'do not call .ToString() on this, just use the bool value checkd
> > > if checkbox.checked = true then
> > > dim cars as string
> > > cars = "Y"
> > > Session("selection") = cars
> > > end if
> > >
> > > Then you code on the next page will work as you are hoping for it to
> work.
> > >
> > > bill
> > >
> > > "Mike" <Mike@discussions.microsoft.com> wrote in message
> > > news:3C57CB24-247E-433D-8971-D2E4E7CE3859@microsoft.com...
> > > > I have a function that is called when the user clicks the submit
> button,
> > > > during this function i also set a varaible to "Y" due to that this
> > > function
> > > > does a post back to the page then redirects. When I look for the
> session
> > > > variable in the page.isPostBack section it equals nothing, it appears
> > > that
> > > > the variable is not being passed to the post back section correctly. I
> > > have
> > > > this due to I only want this function to run if the user has something
> > > > selected in the grid.
> > > >
> > > > code:
> > > > if checkbox.checked.tostring() = true then
> > > > dim cars as string = session("selection")
> > > > cars = "Y"
> > > > end if
> > > >
> > > > in the post back
> > > > if page.isPostback
> > > > if session("selection") = "Y" then 'this equals nothing I debugged
> it
> > > and
> > > > its getting set in the function but being passed as NOTHING
> > > > run Function
> > > > end if
> > > > end if
> > > >
> > > >
> > > >
> > >
> > >
> > >
>
>
>

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