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Thread: Code Bug (Disposed Object?)

  1. #1

    Thread Starter
    New Member JasonMc's Avatar
    Join Date
    Sep 2010
    Posts
    7

    Code Bug (Disposed Object?)

    I am using the following codes:

    This code triggers my transport sequence. I am not having any variable sequences.

    Code:
    Private Sub lblLab_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblLab.Click
            If boolTransportActive = False Then
                lblTitle.Text = "CANNOT TRANSPORT"
                lblTitle.ForeColor = Color.Red
                Exit Sub
            ElseIf boolTransportActive = True Then
                If strCurrentLocation = "Lab" Then
                    strTransportTo = "Pet Store"
                    transport.Show()
                    Me.Close()
                ElseIf strCurrentLocation = "Pet Store" Then
                    strTransportTo = "Lab"
                    transport.Show()
                    Me.Close()
                End If
            End If
    This is the complete class for "transport".

    Code:
    Public Class transport
        
        Private Sub transport_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
            Me.Opacity = 0
            Dim sngOpacity As Single
            For sngOpacity = 0 To 1 Step 0.05
                Me.Opacity = sngOpacity
                Me.Refresh()
                System.Threading.Thread.Sleep(50)
            Next
            currentframe.Close()
    
            If strTransportTo = "Lab" Then
                lab1a.Show()
                lab1a.Opacity = 0
                For sngOpacity = 0 To 1 Step 0.05
                    lab1a.Opacity = sngOpacity
                    lab1a.Refresh()
                    System.Threading.Thread.Sleep(50)
                Next
            ElseIf strTransportTo = "Pet Store" Then
                hab1a.Show()
                hab1a.Opacity = 0
                For sngOpacity = 0 To 1 Step 0.05
                    hab1a.Opacity = sngOpacity
                    hab1a.Refresh()
                    System.Threading.Thread.Sleep(50)
                Next
            ElseIf strTransportTo = "News Station" Then
                rnn1a.Show()
                rnn1a.Opacity = 0
                For sngOpacity = 0 To 1 Step 0.05
                    rnn1a.Opacity = sngOpacity
                    rnn1a.Refresh()
                    System.Threading.Thread.Sleep(50)
                Next
            End If
            Me.Close()
        End Sub
    
    End Class

    This is the error I am receiving:

    System.ObjectDisposedException was unhandled
    Message=Cannot access a disposed object.
    Object name: 'transport'.
    ObjectName=transport
    Source=System.Windows.Forms
    StackTrace:
    at System.Windows.Forms.Control.CreateHandle()
    at System.Windows.Forms.Form.CreateHandle()
    at System.Windows.Forms.Control.get_Handle()
    at System.Windows.Forms.ContainerControl.FocusActiveControlInternal()
    at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
    at System.Windows.Forms.Control.Show()
    at WORD4WORD.transportgui.lblLab_Click(Object sender, EventArgs e) in \\Jasons-mac\seagate\MousePaw\Visual Basic Projects\WORD4WORD\WORD4WORD\transportgui.vb:line 15
    at System.Windows.Forms.Control.OnClick(EventArgs e)
    at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
    at System.Windows.Forms.Control.WndProc(Message& m)
    at System.Windows.Forms.Label.WndProc(Message& m)
    at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
    at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
    at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
    at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
    at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoCompo nentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
    at System.Windows.Forms.Application.RunDialog(Form form)
    at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
    at System.Windows.Forms.Form.ShowDialog()
    at WORD4WORD.WatchGUI.wbtnTransport_Click(Object sender, EventArgs e) in \\Jasons-mac\seagate\MousePaw\Visual Basic Projects\WORD4WORD\WORD4WORD\watchgui.vb:line 115
    at System.Windows.Forms.Control.OnClick(EventArgs e)
    at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
    at System.Windows.Forms.Control.WndProc(Message& m)
    at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
    at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
    at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
    at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
    at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoCompo nentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
    at System.Windows.Forms.Application.Run(ApplicationContext context)
    at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
    at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
    at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
    at WORD4WORD.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
    InnerException:
    What is going wrong? I reach the error at the first instance of "transport.Show()"
    Foghorn Leghorn is proof positive that roosters should not have free access to explosives.
    --
    MousePaw Games
    mousepawgames.com

  2. #2
    I'm about to be a PowerPoster! kleinma's Avatar
    Join Date
    Nov 2001
    Location
    NJ - USA (Near NYC)
    Posts
    23,373

    Re: Code Bug (Disposed Object?)

    why are you closing the form in the load event?

  3. #3

    Thread Starter
    New Member JasonMc's Avatar
    Join Date
    Sep 2010
    Posts
    7

    Re: Code Bug (Disposed Object?)

    I'm making a game. The effect I am aiming for is to fade one screen to white, and then fade that to the new screen.
    Foghorn Leghorn is proof positive that roosters should not have free access to explosives.
    --
    MousePaw Games
    mousepawgames.com

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