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Problem with ChildBarFrameManager in MDI-Application

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3133 Mar 4,2003 07:45 AM Mar 11,2003 01:56 PM Windows Forms 4
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Joerg Krause
Asked On March 4, 2003 07:45 AM

I've a problem with ChildBarFrameManager. I'm using the windows manager class from the featured demo project. It works successfull in my application. Today I open the project and the programm isn't longer running (compiling ok). During the MDI-child creation process the following run time error occurs: System.ArgumentException: Cannot find a ChildFrameBarManager associated with the form type: Genesis.HtmlEditorForm at Syncfusion.Windows.Forms.Tools.XPMenus.MainFrameBarManager.RegisterMdiChildTypes(Type[] formTypes) at Syncfusion.Windows.Forms.Tools.XPMenus.MainFrameBarManager.MdiChildAdded(Object sender, ControlEventArgs e) at System.Windows.Forms.ControlEventHandler.Invoke(Object sender, ControlEventArgs e) at System.Windows.Forms.Control.OnControlAdded(ControlEventArgs e) at System.Windows.Forms.ControlCollection.Add(Control value) at System.Windows.Forms.ControlCollection.Add(Control value) at System.Windows.Forms.Control.set_ParentInternal(Control value) at System.Windows.Forms.Form.set_ParentInternal(Control value) at System.Windows.Forms.Form.set_MdiParentInternal(Form value) at System.Windows.Forms.Form.set_MdiParent(Form value) at Genesis.WindowManager.AddDocument(HtmlEditorForm newForm) in d:\dokumente und einstellungen\joerg\eigene dateien\visual studio-projekte\worldsoftgenesisii\windowmanager.cs:line 211 at Genesis.WindowManager.AddDocumentFromFileName(String fileName) in d:\dokumente und einstellungen\joerg\eigene dateien\visual studio-projekte\worldsoftgenesisii\windowmanager.cs:line 204 at Genesis.WindowManager.OpenFile() in d:\dokumente und einstellungen\joerg\eigene dateien\visual studio-projekte\worldsoftgenesisii\windowmanager.cs:line 110 at Genesis.WindowManager.openBarItem_Click(Object sender, EventArgs e) in d:\dokumente und einstellungen\joerg\eigene dateien\visual studio-projekte\worldsoftgenesisii\windowmanager.cs:line 95 at Syncfusion.Windows.Forms.Tools.XPMenus.BarItem.OnItemClicked(EventArgs args) at Syncfusion.Windows.Forms.Tools.XPMenus.BarItem.PerformClick() at Syncfusion.Windows.Forms.Tools.XPMenus.BarRenderer.OnMouseUp(MouseEventArgs e) at Syncfusion.Windows.Forms.Tools.XPMenus.BarControlInternal.OnMouseUp(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at Syncfusion.Windows.Forms.Tools.XPMenus.BarControlInternal.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) == The step before the error are: // create new child form (successful) HtmlEditorForm childForm = new HtmlEditorForm(fileName); // let the new form attach to the mdi parent newForm.MdiParent = this.EditorMainForm; This statement forces the error. I've tried to debug. childForm does contain a ChildBarFrameManager. The designer shows the bar items. There are some ActiveX controls in the form, but this part of the application works in the past days with and without childBarFrameManager. == Questions: If the form has a childBarFrameManager, created with the designer and properly working in the past, what could happen here? How to debug the process of attaching a MDI child? Thanks for any idea on this subject, Joerg Krause Berlin, Germany

Joerg Krause
Replied On March 4, 2003 03:51 PM

Some additional informations: If I delete the previous used childFrameBarManager (loosing all associated Bars), the error disappears. If a new childFrameBarManager was added from the toolbar, the error reoccurs. It doesn't matter if bars associated or not. Joerg

Ramesh Praveen [Syncfusion]
Replied On March 5, 2003 07:35 AM

Joerg, This probably happens because your child form doesn't have a default constructor. Like we state in our User's Guide, all child forms (using the ChildFrameBarManager) should include a default constructor calling the InitializeComponent method (where the bar manager gets initialized). This is necessary because our framework will want to create a dummy instance of each registered child form type. So, provide a default constructor like this: public HtmlEditorForm() { InitializeComponent(); } and it should work fine. Regards, Praveen Ramesh

Joerg Krause
Replied On March 5, 2003 04:27 PM

Thank you for the response. I've read about the constructor in the help files. So I had a constructor but without InitializeComponent() in it. What it really needs was the call to InitializeComponent(); which I have removed. Maybe the info is helpful for anybody. > > public HtmlEditorForm() > { > InitializeComponent(); > } > > and it should work fine. > > Regards, > Praveen Ramesh > Joerg

Administrator [Syncfusion]
Replied On March 11, 2003 01:56 PM

Thanks for the update.

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