John,

"event class" is just another term for a "business process" class. It represents a business event/process like yours. There's nothing really special to it. You could create a base event class that has some basic methods and properties and then subclass this class and put some special code in it, in order to have it done what you want.

HTH,
Armin

>Hi,
>Actually, I have a staff class. If user want to delete the particular staff record, I want to perform cascade delete for related table. Of course, we can use trigger, but if there are from different database or platform I may need to perform this operation when delete user record. Where should I place the code of cascade delete, business class, datasource class?
>
>A member did tell me to have event class. However, I am not sure clear about it.
>
>Thank you