Textboxes in User Controls not updating in Windows 7 PRO RRS feed

  • Question

  • I originally posted this in the Visual Basic Forum and it was suggested that I post it here as there does not seem to be an answer.


    I have a usercontrol with a few textboxes and a progressbar.

    The programme updates the textboxes and progressbar as it counts people coming through turnstiles.

    It works fine under Windows XP and Windows 7 Ultimate and Windows Vista

    However under Windows 7 Pro it does not.

    It updates OK when the programme is counting. When the programme tries to clear the textboxes back to "0" it all goes wrong.

    The progressbar goes to 0 but the textboxes remain unchanged. If I single step the programme it appears that the textbox.text value actualy changes to "0" but the textbox in the usercontrol still retains it's old value. If I the restart counting the usercontrol does not update. it appears that it has hung.

    below is the code in the usercontrol. I tried the invoke method just to try it. it may not look pretty but it works(under XP)

    There are 12 of these usercontrols on the form and they are on the form at design time and addressed via an array

    dim MyStands(12) as usStand





    To update the textboxes when the programme is counting:

    for i = 1 to noofstands




    To clear the textboxes:

    for i as integer = 1 to noofstands ' could be less than 12




    Public Class usStand
    Public Property MyCapacity As Integer
    Public Property MyStartCrowd As Integer
    Public Property Myspace As Integer
    Public Property MyAmber As Integer
    Public Property MyRed As Integer
    Public Property MyColour As Integer
    Public Property InCount As Integer
    Public Property MyName As String
    Public Property MyID As Integer
    Public Event AmberAlert(ByVal ID As Integer)
    Public Event RedAlert(ByVal ID As Integer)
    Public Event OverFlowAlert(ByVal ID As Integer)
    Public UserSize As Long
    ' Private WithEvents tmrFlash As Timers.Timer
    Private Property LastState As Integer = 0
    Private Property AmberAlerted As Boolean
    Private Property RedAlerted As Boolean
    Private Property OverflowAlerted As Boolean

    Public Sub SetColour(ByVal cn As Integer)
    _MyColour = cn
    With Me
    .BackColor = Color.FromArgb(cn)

    End With

    End Sub
    Public Sub SetName(ByVal Nm As String)
    _MyName = Nm
    Me.Label1.Text = _MyName

    End Sub
    Public Sub SetFlowRate(ByVal Value As Double)

    Me.txtFlowRate.Text = Value
    End Sub
    Public Sub SetTimeToFull(ByVal value As Double)
    ' Debug.Print("SetTimeToFull: " & MyName & " " & value)
    Me.txtTimetoFull.Text = value
    End Sub
    Public Sub SetSpace()

    Dim sp As Integer = _MyCapacity - (_InCount + _MyStartCrowd)
    txtSpace.Text = sp
    End Sub
    Private Sub CalcFlowRate()

    End Sub
    Public Sub SetCount(ByVal crowd As Integer)
    _InCount = crowd

    ProgressBar1.Value = _InCount + _MyStartCrowd
    label5.Text = _InCount + _MyStartCrowd
    Dim ls As Integer = CheckAlarm()

    Select Case ls
    Case Is = 0

    Me.label5.BackColor = Color.LightGreen
    Me.BackColor = Color.FromArgb(MyColour)
    Case Is = 1

    Me.label5.BackColor = Color.Khaki

    Case Is = 2

    Me.label5.BackColor = Color.Orange
    If Not AmberAlerted Then
    RaiseEvent AmberAlert(MyID)
    AmberAlerted = True
    End If
    Case Is = 3

    Me.label5.BackColor = Color.Red
    If Not RedAlerted Then
    RaiseEvent RedAlert(MyID)
    RedAlerted = True
    End If
    Case Is = 4
    Me.BackColor = Color.Red
    If Not OverflowAlerted Then
    RaiseEvent OverFlowAlert(MyID)
    OverflowAlerted = True
    End If

    End Select

    End Sub
    Public Sub SetCapacity(ByVal capacity As Integer)
    _MyCapacity = capacity
    Me.ProgressBar1.Maximum = capacity
    End Sub
    Public Sub SetStartCrowd(ByVal sc As Integer)
    If sc > _MyCapacity Then
    MsgBox("The value you entered for StartCrowd exceeds the capacity of the stand", MsgBoxStyle.OkOnly)
    Exit Sub
    End If
    _MyStartCrowd = sc
    ProgressBar1.Value = sc
    End Sub

    Public Sub ClearStandCounts()
    Try ' InCount = MyStartCrowd
    _InCount = 0
    Me.BackColor = Color.FromArgb(_MyColour)

    _Myspace = _MyCapacity - (_InCount + _MyStartCrowd)
    Invoke(New SetTexts(AddressOf DoSetTexts))

    ' SetSpace()
    Catch ex As Exception
    End Try
    End Sub
    Private Function CheckAlarm() As Integer
    Dim a, b, c, d As Boolean
    a = _InCount > _MyCapacity * _MyAmber / 100
    b = _InCount > _MyCapacity * _MyAmber / 100
    c = _InCount > _MyCapacity * _MyRed / 100
    d = _InCount > _MyCapacity
    Dim ca As Integer = 0
    If a Then ca = 1
    If b Then ca = 2
    If c Then ca = 3
    If d Then ca = 4
    'If InCount > MyCapacity * myAmber1Alert / 100 Then
    ' ca = 1
    'ElseIf InCount > MyCapacity * myAmber2Alert / 100 Then
    ' ca = 2
    'ElseIf InCount > MyCapacity * myRedAlert / 100 Then
    ' ca = 3
    'ElseIf InCount > MyCapacity Then
    ' ca = 4
    'End If
    Return ca
    End Function
    Public Function GetData() As Integer
    Dim i As Integer = 0

    Return i
    End Function
    Private Delegate Sub SetTexts()

    Private Sub DoSetTexts()
    Me.txtFlowRate.Text = "0"
    Me.txtSpace.Text = _Myspace
    Me.txtTimeToFull.Text = "0"
    Me.ProgressBar1.Value = _InCount + _MyStartCrowd
    Me.label5.Text = _InCount + _MyStartCrowd

    Me.label5.BackColor = Color.LightGreen

    End Sub
    End Class

    I loaded VS2010 on the PC and deleted and rebuilt the User Control from scratch,, it still failed.

    I changed the textboxes to labels and the control now works.

    Is this normal for Windows 7 PRO?



    Jim Bartlett
    Monday, August 22, 2011 9:04 AM

All replies

  • Technically all editions of Win7 has the same code base, only features are limited based on editions.

    Have you tested it on multiple Win7 PRO boxes with same result?


    This isnt really a developer forum, but hopefully someone with programming experience can review the code and help.


    Sumesh P - Microsoft Online Community Support
    Thursday, August 25, 2011 6:33 AM
  • No I have not.

    I only have one PC with 7 PRO on. I do not have a spare PC I can load 7 PRO onto as they are all inuse with XP and programmes that I know will not work with Windows 7.

    But I do know that it works fine on 7 Ultimate.

    The Pc with 7 PRO on is an Acer 430G. Acer were not much help when I asked them if there was anything odd about their PC and Windows 7. All they said was contact Microsoft.


    Jim Bartlett
    Thursday, August 25, 2011 9:26 AM
  • You can try installing Win7 onto a virtual machine on your existing PC or try reinstalling if that is feasible. It may be an issue with that particular installed instance of win7.

    Again all editions of Win7 has the same code base.


    Sumesh P - Microsoft Online Community Support
    Wednesday, August 31, 2011 9:32 AM