StrataFrame Forum » StrataFrame Application Framework - V1 » Business Objects and Data Access (How do I?) » BO translation and subclassing

BO translation and subclassing

dgsoft — Thu, 27 May 2010 10:05:09 GMT

Hi, I have an environment
Step1.
[UserControl1 (based on SF userControl)
_|___ UserControl2 (based on SF userControl)
_|_________|____ BO2
_|___BO1

Between BO1 and BO2 I have translation.

Step2.
[Form]
__|___ UserControl1
__|________|___ BO1
__|__BO0

Between BO0 and BO1 I have translation.

This combination works perfect.

Step3.
I create UserControl3 based on UserControl1 !!!
When form starts I'v got an error message now. (below)
It seems in subclassing my BO translation lost. I try to make BO as Public but it does not help.
Any idea?

[codesnippet]
BusinessLayerException
The business object [BO1] could not be located. It is most likely this object was deleted or renamed.

Source : MicroFour StrataFrame UI

Stack Trace:
bei MicroFour.StrataFrame.UI.Windows.Forms.BusinessObjectTranslator.GetBusinessObject(ContainerControl ParentControl, String BusinessObjectName)
bei MicroFour.StrataFrame.UI.Windows.Forms.BusinessObjectTranslator.TranslateBusinessObjects(BusinessObjectTranslationCollection Translations, ContainerControl SourceContainer, ContainerControl DestinationContainer)
bei MicroFour.StrataFrame.UI.Windows.Forms.UserControl.TranslateBusinessObjects()
bei MicroFour.StrataFrame.UI.Windows.Forms.UserControl.InitializeObject()
bei MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.InitializeFormLoadObjects()
bei MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.OnLoad(EventArgs e)
bei System.Windows.Forms.Form.OnCreateControl()
bei System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
bei System.Windows.Forms.Control.CreateControl()
bei System.Windows.Forms.Control.WmShowWindow(Message& m)
bei System.Windows.Forms.Control.WndProc(Message& m)
bei System.Windows.Forms.ScrollableControl.WndProc(Message& m)
bei System.Windows.Forms.ContainerControl.WndProc(Message& m)
bei System.Windows.Forms.Form.WmShowWindow(Message& m)
bei System.Windows.Forms.Form.WndProc(Message& m)
bei System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m)
bei System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m)
bei System.Windows.Forms.Nativewindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
[/codesnippet]

RE: BO translation and subclassing

Greg McGuffey — Thu, 27 May 2010 10:05:09 GMT

Glad you got it going. :D

RE: BO translation and subclassing

dgsoft — Thu, 27 May 2010 08:59:31 GMT

Hi,
I reproject logic :) It seems better to place class instance then subclass it.

Thanks
Denis

RE: BO translation and subclassing

Greg McGuffey — Mon, 24 May 2010 18:11:42 GMT

At this point, a small sample app would really help. Then I could open it and not only see what's going on, but also offer suggestions (or cry for help :blink: from Trent et all). I'd suggest you make a sample app using BOs from the StrataFrameSample, that way I'll have the data/structures already and it will keep it simple.

RE: BO translation and subclassing

dgsoft — Mon, 24 May 2010 16:53:59 GMT

Hi,
UserControl3 inherits UserControl1.

On userControl1 I made BusinessObject [b] public [/b]. I expect it will visible for the new Form for BO translation also (new form where I going to place UserControl3), but..

When I put UserControl3 on the form and try to make BO translation, in the Wizard form - I can see NO business object. Just for example, when I drop in design time some new business object to UserControl3 - its avaliable for translation in new form. But if BusinessObject comes from inherited UserControl1 - its not available.

But as I told before.. error comes from case when

UserControl3 Inherists UserControl1..
and UserControl1 has BusinessObject and translation with UserControl2 (userControl2 located in the userControl1 and has same BO).

As I thinking.. the Public Modifier initialize BusinessObject in UserControl3 more late then its using in parent UserControl1 to initialize Translation. and If I use Private BusinessObject - I can't made new translation with new form where UserContrl3 placed.

I hope I explain it good enough.. :)

RE: BO translation and subclassing

Greg McGuffey — Mon, 24 May 2010 15:03:38 GMT

If I'm following you, you likely need to make the field under the BO to be protected. That will make is available to sub-classes. You can change this in the designer, under the Design category in the property window, the Modifier property. If it's set to private, then this could be your problem. If it's already set to something else, then we'll have to dig deeper.