Duplicated form

[xoggoth]

Opening main form with

Dim fMain As New frmMain
fMain.Show()

Removed code from load/activate events of frmMain and only child, checked no other references but getting two copies of frmMain. Just using frmMain.show is ok, but shouldn't the original just give me just one instance?

Cheers for any ideas.

[talkro]

Have you check if in the new procedure of the frmMain class you are not showing the form as well?

[18experience]

Are you putting

Dim fMain As New frmMain
fMain.Show()

those lines in the code for frmMain itself? If so, you don't have to do that. It will automatically show the startup form of your project.

[xoggoth]

That was quick. Cheers!

Seems not. In class thingy is 'MyBase.New(). Not sure what MyBase.new is supposed to do but commenting it out makes no difference.

[talkro]

can you post your class frmMain?

[xoggoth]

Not putting that in frmMain no, it is in the button click code of the Introduction form that is defined as the start up form. Tried with the frmMain event (frmMain_load) empty and no child form at all. Same problem.

The class is what the conversion from VB6 and design mode changes have made of it. Not altered the code directly. Anyway:-

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> Partial Class frmMain
#Region "Windows Form Designer generated code "
<System.Diagnostics.DebuggerNonUserCode()> Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
End Sub
'Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> Protected Overloads Overrides Sub Dispose(ByVal Disposing As Boolean)
If Disposing Then
If Not components Is Nothing Then
components.Dispose()
End If
End If
MyBase.Dispose(Disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
Public ToolTip1 As System.Windows.Forms.ToolTip
Public dlgCommonDialog1Open As System.Windows.Forms.OpenFileDialog
Public dlgCommonDialog1Save As System.Windows.Forms.SaveFileDialog
Public dlgCommonDialog1Font As System.Windows.Forms.FontDialog
Public dlgCommonDialog1Color As System.Windows.Forms.ColorDialog
Public dlgCommonDialog1Print As System.Windows.Forms.PrintDialog
Public WithEvents mnuDataInfo As System.Windows.Forms.ToolStripMenuItem
blah blah
Public WithEvents mnuWeb As System.Windows.Forms.ToolStripMenuItem
Public WithEvents MainMenu1 As System.Windows.Forms.MenuStrip
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.components = New System.ComponentModel.Container
Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(frmMain))
Me.ToolTip1 = New System.Windows.Forms.ToolTip(Me.components)
Me.dlgCommonDialog1Open = New System.Windows.Forms.OpenFileDialog
Me.dlgCommonDialog1Save = New System.Windows.Forms.SaveFileDialog
Me.dlgCommonDialog1Font = New System.Windows.Forms.FontDialog
Me.dlgCommonDialog1Color = New System.Windows.Forms.ColorDialog
Me.dlgCommonDialog1Print = New System.Windows.Forms.PrintDialog
Me.MainMenu1 = New System.Windows.Forms.MenuStrip
Me.mnuData = New System.Windows.Forms.ToolStripMenuItem
Me.mnuDataInfo = New System.Windows.Forms.ToolStripMenuItem
blah blah
Me.mnuWeb = New System.Windows.Forms.ToolStripMenuItem
Me.ToolStrip1 = New System.Windows.Forms.ToolStrip
Me.ToolStripButton0 = New System.Windows.Forms.ToolStripButton
blah blah
Me.ToolStripButton11 = New System.Windows.Forms.ToolStripButton
Me.ToolbarBMP = New System.Windows.Forms.ImageList(Me.components)
Me.TBImages = New System.Windows.Forms.ImageList(Me.components)
Me.MainMenu1.SuspendLayout()
Me.ToolStrip1.SuspendLayout()
Me.SuspendLayout()
'
'MainMenu1
'
Me.MainMenu1.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuData, Me.mnuView, Me.mnuOptions, Me.mnuWindow, Me.mnuHelp, Me.mnuWeb})
Me.MainMenu1.Location = New System.Drawing.Point(0, 0)
Me.MainMenu1.Name = "MainMenu1"
Me.MainMenu1.Size = New System.Drawing.Size(535, 24)
Me.MainMenu1.TabIndex = 2
'
'mnuData
'
Me.mnuData.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuDataInfo, Me.mnuDataInter, Me.mnuDataPrint, Me.mnuDataCopy, Me.mnuDataExit})
Me.mnuData.MergeAction = System.Windows.Forms.MergeAction.Remove
Me.mnuData.Name = "mnuData"
Me.mnuData.Size = New System.Drawing.Size(43, 20)
Me.mnuData.Text = "Data"
'
'mnuDataInfo
'
Me.mnuDataInfo.Name = "mnuDataInfo"
Me.mnuDataInfo.Size = New System.Drawing.Size(178, 22)
Me.mnuDataInfo.Text = "Information index"
blah blah
blah blah
'mnuWeb
'
Me.mnuWeb.MergeAction = System.Windows.Forms.MergeAction.Remove
Me.mnuWeb.Name = "mnuWeb"
Me.mnuWeb.Size = New System.Drawing.Size(61, 20)
Me.mnuWeb.Text = "Website"
'
'ToolStrip1
'
Me.ToolStrip1.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.ToolStripButton0, Me.ToolStripButton1, Me.ToolStripButton2, Me.ToolStripButton3, Me.ToolStripButton4, Me.ToolStripButton5, Me.ToolStripButton6, Me.ToolStripButton7, Me.ToolStripButton8, Me.ToolStripButton9, Me.ToolStripButton10, Me.ToolStripButton11})
Me.ToolStrip1.Location = New System.Drawing.Point(0, 24)
Me.ToolStrip1.Name = "ToolStrip1"
Me.ToolStrip1.Size = New System.Drawing.Size(535, 25)
Me.ToolStrip1.TabIndex = 3
Me.ToolStrip1.Text = "ToolStrip1"
'
'ToolStripButton0
'
Me.ToolStripButton0.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
Me.ToolStripButton0.Image = CType(resources.GetObject("ToolStripButton0.Image"), System.Drawing.Image)
Me.ToolStripButton0.ImageTransparentColor = System.Drawing.Color.Magenta
Me.ToolStripButton0.Name = "ToolStripButton0"
Me.ToolStripButton0.Size = New System.Drawing.Size(23, 22)
Me.ToolStripButton0.Text = "ToolStripButton1"
blah blah
'ToolStripButton11
'
Me.ToolStripButton11.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
Me.ToolStripButton11.Image = CType(resources.GetObject("ToolStripButton11.Image"), System.Drawing.Image)
Me.ToolStripButton11.ImageTransparentColor = System.Drawing.Color.Magenta
Me.ToolStripButton11.Name = "ToolStripButton11"
Me.ToolStripButton11.Size = New System.Drawing.Size(23, 22)
Me.ToolStripButton11.Text = "ToolStripButton12"
'
'ToolbarBMP
'
Me.ToolbarBMP.ImageStream = CType(resources.GetObject("ToolbarBMP.ImageStream"), System.Windows.Forms.ImageListStreamer)
Me.ToolbarBMP.TransparentColor = System.Drawing.Color.Transparent
Me.ToolbarBMP.Images.SetKeyName(0, "tb1.bmp")
blah blah
Me.ToolbarBMP.Images.SetKeyName(25, "tb63.bmp")
'
'TBImages
'
Me.TBImages.ImageStream = CType(resources.GetObject("TBImages.ImageStream"), System.Windows.Forms.ImageListStreamer)
Me.TBImages.TransparentColor = System.Drawing.Color.Transparent
Me.TBImages.Images.SetKeyName(0, "tb1.bmp")
blah blah
Me.TBImages.Images.SetKeyName(25, "tb63.bmp")
'
'frmMain
'
Me.BackColor = System.Drawing.SystemColors.AppWorkspace
Me.ClientSize = New System.Drawing.Size(535, 276)
Me.Controls.Add(Me.ToolStrip1)
Me.Controls.Add(Me.MainMenu1)
Me.Cursor = System.Windows.Forms.Cursors.Default
Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
Me.IsMdiContainer = True
Me.Location = New System.Drawing.Point(11, 30)
Me.Name = "frmMain"
Me.RightToLeft = System.Windows.Forms.RightToLeft.No
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
Me.MainMenu1.ResumeLayout(False)
Me.MainMenu1.PerformLayout()
Me.ToolStrip1.ResumeLayout(False)
Me.ToolStrip1.PerformLayout()
Me.ResumeLayout(False)
Me.PerformLayout()

End Sub
Friend WithEvents ToolStrip1 As System.Windows.Forms.ToolStrip
Friend WithEvents ToolStripButton0 As System.Windows.Forms.ToolStripButton
blah blah
Friend WithEvents ToolStripButton11 As System.Windows.Forms.ToolStripButton
Friend WithEvents ToolbarBMP As System.Windows.Forms.ImageList
Friend WithEvents TBImages As System.Windows.Forms.ImageList
#End Region
End Class

[18experience]

Could you please post the actual click event code, too?

[xoggoth]

I thought of bounce but the close should stop that?

Private Sub Choice_4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Choice_4.Click

' Add any initialization after the InitializeComponent() call.

Dim fMain As New frmMain
fMain.Show()

' remove the intro form
Me.Close()

End Sub

[Shaggy Hiker]

Does anything else trigger the button press? That's not a likely occurence in a button, but happens plenty with some other types of controls.

One thing you might try is putting a breakpoint on the fMain.Show line. If you reach that breakpoint twice, then you just have to figure out how you got there each time. One will be a button press, the other will be an accident.

If you only reach the breakpoint once, then something else is also showing frmMain. If this is 2005, then you may be showing the instance you created, and somewhere else you may be showing the default instance.

[xoggoth]

Cheers shaggy. Immediately after the end of the frmMain_Load it does indeed go straight back to that line. Something else odd, the introduction form does not immediately show in the task bar, but if I just leave the debugger on the line one appears after about 5 seconds. Stepping on then produces the 2nd copy. Somehow I managed to get three once!

I think I may have to start a clean project not based on a VB6 conversion and do a cut n paste job. The converted code just seems to have so many complications in the classes that you don't get if you do the same thing from scratch.

****Update!! Started again with clean project with no automatic update from VB6 stuff, so problem sorted! (really messy, some of the substitutions!!) Ta to all above for the help.