StrataFrame Forum » StrataFrame Application Framework - V1 » Business Objects and Data Access (How do I?) » Does BBS clone Business Object?

Does BBS clone Business Object?

dgsoft — Fri, 18 Feb 2011 11:46:20 GMT

Hi,

I wrote business logic inside BO.

For example,

BO1.pmks_relatedBO = BO2

So, for BO1 I made public property AS BO2

In Design Time - in Property Grid - for BO1 I select BO2.

Then I bild BO1 to Textboxes and Also make BO1BBS and Bind it to the Grid.

Some properties setter has custom code inside which ask some properties of BO2

When I change textbox value - I have no problem - all works as expected

When I change cell value in the Gird - I'v got an error

When I debug code - I can see my BO2 is Nothing! But in design time and runtime when I change textbox values - BO2 exist.

Then appears a question. Where is instance of BO2? Is BBS clone businessobject and work with copy of instance or?

Thanks for the help

Denis.

RE: Does BBS clone Business Object?

dgsoft — Fri, 18 Feb 2011 11:46:20 GMT

Ok. I found in source

BusinessBindingSource.vb

Private Function CreateShareAndAddBusinessObject(ByVal index As Integer) As BusinessLayer
'-- Create a new object
Dim loReturn As BusinessLayer = CType(Activator.CreateInstance(Me._BusinessObject.GetType()), BusinessLayer)

'-- Share the table
Me._BusinessObject.ShareCurrentDataTable(loReturn)

'-- Set the parent business object of the instance object
loReturn.ParentBusinessObject = _BusinessObject.ParentBusinessObject

'-- Add the object to the list
Me._BusinessObjectList.Add(index, loReturn)

'-- Return the new object
Return loReturn
End Function

HERE.. I WANNA have a HOOK like RaiseEvent CustomizeMyBusinessObject(loReturn)

and there.. in BBS.CustomizeMyBUsinessObject I can make

Public Sub CustomizeMyBusinessObject(ByVal toReturn as BusinessLayer) Handles BBS.CustomizeMyBusinessObject

Dim loBO as MyBO = TryCast(toReturn, MyBO)
loBO.myParentBO = BO2
loBO.myAnotherBO = BO3

That could be a solution for me and Now last question :)

It is possible to make without modification in StrataFrame source code? Somewhere in subclasses...

RE: Does BBS clone Business Object?

dgsoft — Fri, 18 Feb 2011 11:25:13 GMT

I debug code and found next thing...

1) When property change fired in BO which bind to the Grid using BBS - ParentBusinessObject - correct! and there 1 record inside!

So far, exist possibility to make a reference to instance of BO from another BO which located on the form!

But how?