AffectedProperties Issues

JasonBock posted on Friday, June 08, 2012

I don’t know if it’s because CSLA isn’t working as I thought it should, or I'm making a bad assumption, or what, but I have a confusing issue with business rules and affected properties.

Here’s the simple example. I have three properties, A, B, and C. A affects B, and B affects C, meaning, B is in the list of AffectedProperteis for A, and C is in the AffectedProperties list for B. I change A, and now B is required. I change B, and now C is required.

This is what I want…except…when I change A, only B gets affected. C’s rule does NOT fire, and so it looks like C is still in a broken state.

Do I need to set C as an affected property in A? And if this is the case, I have to make sure B is before C in A's AffectedProperties list, correct? This seems like it should be unnecessary, but I can’t figure out what else to do. Any insight is appreciated - TIA

JonnyBee replied on Friday, June 08, 2012

Hi Jason,

Yes, AffectedProperties only works for the "first" level - in order to avoid circular dependencies.

Is this "lookup" rules that updates properties?

So your options is to

• Add C to A's AffectedProperties or
• Override PropertyHasChanged and add specific code for revalidaion of property C after regular check of property A's rules. 
• Create one rule that sets Error on all properties A/B/C thast triggers when one of the rules is changed (by using InputProperties that is now also considered as Dependency)