[RESOLVED] Form hangs under Vista 64 bits

Hi:

I have detected a problem running my application under Vista 64 bits OS.

My application is developed using VB.NT 2008 and compiled as x86

I have a main form. In this form there is an option to open other form. TThis second form must return a few values to the main form. When the user click on this 2nd form, to return values, this form hangs up (2nd form hangs up)

But for what I could have known, it continues executing the rest of code that exists after to open form. I want to say that the form dialog (2nd form) is not closed (hangs up) but it the code continues being executed, because I have seen that inserts the data in the database.

The application not returns any error and any exception.

frmWaiting (form displayed when call thread)

Code:

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This forms contains progressbar

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main form

Code:

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Dim ThreadVentas As System.Threading.Thread

 Private Sub ClosePb()
        Try
            If Me.InvokeRequired Then
                Me.Invoke(New ClosePbDelegate(AddressOf ClosePb))
            Else
                If Not frmPb Is Nothing Then
                    frmPb.Close()
                    frmPb = Nothing
                End If
                Me.loadData(condicio, condicio2)
            End If
        Catch ex As Exception

        End Try
    End Sub

Private Sub btGenDocVtas_ItemClick(ByVal sender As System.Object, ByVal e As DevExpress.XtraBars.ItemClickEventArgs)
      Try
            ThreadVentas = New System.Threading.Thread(AddressOf savedata)
            ThreadVentas.Start()
            frmPb = New frmWaiting
            frmPb.ShowDialog()
            Me.cmbBase.Focus()
        Catch ex As Exception
            gSaveError(Me.Name, ex.ToString)
        End Try
    End Sub

private sub SaveData()

 Dim f As New frmxxxx
    Try
      If f.ShowDialog = Windows.Forms.DialogResult.OK Then
        serie = f.f_serie
        doc = f.fdoc     
      Else
        If Not f Is Nothing Then
          f.Dispose()
          f = Nothing
        End If
        Exit Sub
      End If
    Catch ex As Exception   
      gSaveError(Me.Name, ex.ToString)
    Finally
      If Not f Is Nothing Then
        f.Dispose()
        f = Nothing
      End If
    End Try
'From here there are code to insert data in the database
......
.....

End Sub

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frmXXXX (2nd form)

Code:

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Dim dtseries As DataTable
-------

  Public ReadOnly Property fserie() As String
    Get
      Return Me.cmbDocVtas.SelectedItem
    End Get
  End Property
  Public ReadOnly Property fdoc() As Boolean
    Get
      Return Me.chkAp.Checked
    End Get
  End Property


Private Sub frmXXXX_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
 Me.dtseries = Nothing
End Sub

Private Sub btOk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btOk.Click
  Me.DialogResult = DialogResult.OK
End Sub

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There is something that and it works differently in systems of 64 bits? There is incorrect code? on other computers it works well,


Regards :wave:

have you tried setting breakpoints and stepping through the code to see where it's going and what it's doing?

-tg

Are you making any Cross Thread calls? Like, is SaveData() being called on a thread that's not the UI thread?

Quote:

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Originally Posted by techgnome

have you tried setting breakpoints and stepping through the code to see where it's going and what it's doing?

-tg

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this ocurrens on PC's customer. I can not install VS there:rolleyes:

but i control exceptions and not returns any error and any advice

Quote:

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Are you making any Cross Thread calls? Like, is SaveData() being called on a thread that's not the UI thread?

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Yes.

I have updated my 1st post to show thread call. User click btGenDocVtas button to start process

But I am using similar threads and runs fine. Except this.

I have found the problem following the comments of the user formlesstree4

The problem was thread. :rolleyes: