Codejock Developer Community : nullreferenceexception- dockingpanel help...

Codejock Developer Community : nullreferenceexception- dockingpanel help... http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sun, 14 Jun 2026 16:42:27 +0000 Fri, 12 Feb 2010 08:21:14 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=16180 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[nullreferenceexception- dockingpanel help... : Dim Control, CtlProject As Xtr...]]> http://forum.codejock.com/forum_posts.asp?TID=16180&PID=56754&title=nullreferenceexception-dockingpanel-help#56754 Author: SuperMario
Subject: 16180
Posted: 12 February 2010 at 8:21am

Dim Control, CtlProject As XtremeCommandBars.CommandBarPopup

CtlProject =wndAxCommandBars.ActiveMenuBar.Controls.Add(XtremeCommandBars.XTPControlType.xtpControlPopup,100, "New", -1, False)

]]> Fri, 12 Feb 2010 08:21:14 +0000 http://forum.codejock.com/forum_posts.asp?TID=16180&PID=56754&title=nullreferenceexception-dockingpanel-help#56754 <![CDATA[nullreferenceexception- dockingpanel help... : dear all: i meet an an err:...]]> http://forum.codejock.com/forum_posts.asp?TID=16180&PID=56751&title=nullreferenceexception-dockingpanel-help#56751 Author: Jack.Lau
Subject: 16180
Posted: 11 February 2010 at 10:44pm

dear all:

i meet an an err: System.NullReferenceException:Objec reference not set to an instance of an object when

show a child form with dockingpanel and commandbar control in a mdi form.

step1: create a mdi form "MDIParent1" with menu item "new form"

step2: create another form "Form1"

step3: put a dockingpanel and commandbar control in form1, put another two RichTextBoxs as panels

step4: code in form1 is follows:

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Control, CtlProject As XtremeCommandBars.CommandBarControl

        CtlProject = wndAxCommandBars.ActiveMenuBar.Controls.Add(XtremeCommandBars.XTPControlType.xtpControlPopup, 100, "New", -1, False)
        With CtlProject.CommandBar.Controls
            Control = .Add(XtremeCommandBars.XTPControlType.xtpControlButton, 200, "Exit")
            Control.BeginGroup = True
            Control = .Add(XtremeCommandBars.XTPControlType.xtpControlButton, 300, "Login")
            Control.BeginGroup = True
        End With

        wndAxDockingPane.SetCommandBars(wndAxCommandBars.GetDispatch)
        wndAxDockingPane.Options.HideClient = True
        Dim panA, panB As XtremeDockingPane.Pane
        panA = wndAxDockingPane.CreatePane(1, 220, 1200, XtremeDockingPane.DockingDirection.DockLeftOf, Nothing) '
        panA.title = "This pane1"

panB = wndAxDockingPane.CreatePane(2, 220, 1200, XtremeDockingPane.DockingDirection.DockBottomOf, panA) '
panB.title = "This pane1"

End Sub

    Private Sub wndAxDockingPane_AttachPaneEvent(ByVal sender As System.Object, ByVal e As AxXtremeDockingPane._DDockingPaneEvents_AttachPaneEvent) Handles wndAxDockingPane.AttachPaneEvent
        Select Case e.item.Id
            Case 1 : e.item.Handle = RichTextBox1.Handle.ToInt32
            Case 2 : e.item.Handle = RichTextBox2.Handle.ToInt32
        End Select
    End Sub
End Class

step5: code in MDIParent1 is follows:

Imports System.Windows.Forms

Public Class MDIParent1

    Private Sub ShowNewForm(ByVal sender As Object, ByVal e As EventArgs) Handles NewToolStripMenuItem.Click, NewToolStripButton.Click
        Dim ChildForm As New Form1
        ChildForm.MdiParent = Me

        Static Dim m_ChildFormNumber As Integer
        m_ChildFormNumber += 1
        ChildForm.Text = "Doc - " & m_ChildFormNumber

ChildForm.Show()
End Sub
End Class

step5: when startwith form1, every thing runs well, includes the commandbar and dockingpanel control

step6: when start with MDIParent1 , it shows the form1 as a child form, when use the commandbar and dockingpanel control,

error occurs:

err1: with commandbar

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Control, CtlProject As XtremeCommandBars.CommandBarControl

CtlProject = wndAxCommandBars.ActiveMenuBar.Controls.Add(XtremeCommandBars.XTPControlType.xtpControlPopup, 100, "New", -1, False)

----->System.NullReferenceException:Objec reference not set to an instance of an object

err2: with dockingpanel

Dim Control, CtlProject As XtremeCommandBars.CommandBarControl

        'CtlProject = wndAxCommandBars.ActiveMenuBar.Controls.Add(XtremeCommandBars.XTPControlType.xtpControlPopup, 100, "New", -1, False)
        'With CtlProject.CommandBar.Controls
        '    Control = .Add(XtremeCommandBars.XTPControlType.xtpControlButton, 200, "Exit")
        '    Control.BeginGroup = True
        '    Control = .Add(XtremeCommandBars.XTPControlType.xtpControlButton, 300, "Login")
        '    Control.BeginGroup = True
        'End With

-------------------------------------

Visual Studio 2005 8.0.50727.42

Visual Basic Project

.net framework 2.0.50727

Codejock13.2.1 ActiveX

]]> Thu, 11 Feb 2010 22:44:53 +0000 http://forum.codejock.com/forum_posts.asp?TID=16180&PID=56751&title=nullreferenceexception-dockingpanel-help#56751