Question

I got a business object bounds to a form (each property is bound to a control). There is some business specificatios (such as this field should not be empty, this one must be greater than 0 etc…). What is the best way to check all the rules ?

I currently have a validator on each contorl, so I can check for all validator to be ok, but I don’t really like this solution. Indeed the rules are dispached and it’s no easy to see all at once.

I can have a big method CheckValidaty that check for all the rules but this leads to a double check with the validators.

What would you do, other solution ?

Answer 1

I would suggest that let the BusinessObject implement IDataErrorInfo. I think it is the cleanest way to handle business errors.

Take a look at these links:

1. http://msdn.microsoft.com/en-us/library/system.componentmodel.idataerrorinfo_members.aspx
2. http://www.codegod.de/WebAppCodeGod/objectdatasource-and-idataerrorinfo-with-winforms-AID427.aspx