Hi,
Thank you.
I have read the articles, but I still nto very clear about BO.
I think it is be great if there are any sample.
I used to read alot of articles about BO and data object and go thru the sample class, however all of them use simple example such as customer.
Is there any example for 1-many-relationship BO, like Invoice?

Let take invoice as my "target"
1. As you mentioned, invoice will involve customer, order details, stock. Do you meant that I will have Invoice BO, and also have property to hold the customer, order details and stock BO? Then, we could access data layer thru the BO ?

2. Should I have order details BO and data object? How invoice BO access the order details record, thru order details BO, order details data object or using view/ADO that join order and order details in invoice data object?

3. As the table structure shown in previous message, my stock control system application support multiple branches, multiple selling price for each branches. Then, I should have BO like branch, item, stock and ..?? price is a BO? I feel not, then how I able to access the items' multiple selling price since it is normalized and not stored in item table?`


Pls advise
Thank you