Re: OO development question...

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"Brad Pears" <bradp@xxxxxxxxxxxxxxxxxxxxx> wrote in
news:OYT4V4ZPIHA.1756@xxxxxxxxxxxxxxxxxxxx:

I am unsure how I should develop the business classes, whether I
should have just one business class which includes collection
properties to house the two 1-M relationships or whether I should
create three business classes (one for each table) with the high level
class containing one collection property for it's 1-M relationship
with the 2nd class and in the second class, also include a collection
property to house the 1-M relationship it is in with the 3rd class...


You should have 3 classes, for each 1->M relationship, use a collection
to house the objects.

i.e,

Parent
Property Child as List(of Child)


Child
Property GrandChild as List(of GrandChild)


GrandChild
just a bunch of properties

your parent object - you may even want to inherit from a base object so
that you can put in generic helper functions (i.e. Save to Database,
Delete, etc.)

You should also take a look at LLBLGen Pro and Typed Datasets - LLBLGen
Pro is a OR Mapper which does this sort of mapping for you. Typed
Dataset is a VS.NET feature which does something similar but is MUCH
more primative ;-)


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