Display array values on page one at a time

Hi,

I have an ASP .net page that contains a label and a NEXT button.

I want to display in the label, array values one at a time as the next button is pushed. This is the foundation that I will build further functionality on. This seems so simple, but I can’t figure out how to do it – I am new to asp .net. I’m trying to increment a counter to go through the array, but the counter keeps getting reset to zero. I hope someone can help me. THANKS! Here is my code:

Public Class AssignRecTypePerms
Inherits System.Web.UI.Page
Dim ctr As Integer

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
Dim SCArray(,) = CType(Session.Item("SessSCArray"), Array)
lblSchoolCode.Text = SCArray(1, 0)
ctr = 0
End If
End Sub

Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNext.Click

Dim SCArray(,) = CType(Session.Item("SessSCArray"), Array)
ctr = ctr + 1
lblSchoolCode.Text = SCArray(1, ctr)

End Sub
End Class

Using class level variables is dangerous in asp. Try using a session variable:

VB Code:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
Dim SCArray(,) = CType(Session.Item("SessSCArray"), Array)
lblSchoolCode.Text = SCArray(1, 0)
session("ctr") = 0
End If
End Sub
 
Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNext.Click
 
Dim SCArray(,) = CType(Session.Item("SessSCArray"), Array)
session("ctr") = directcast(session("ctr"),int32) + 1
lblSchoolCode.Text = SCArray(1, directcast(session("ctr"),int32) )
 
End Sub

Because you've declared ctr, and ctr is not assigned the value in the session object at all. In fact, I don't see where ctr is being incremented.

Store CTR in Viewstate or Session.