How do I implement a granular IsDirty for each field in Catel?

Question

Catel's ModelBase supports an IsDirty property that changes if any property has changed. Is there a mechanism to check for each property changing? ModelBase implements something like this internally for the IEditableObject implementation using BackupData. Is there a clean way to expose whether a single property has changed?

Answer 1

Catel doesn't track actual field changes which are exposed to the outside. It should be fairly easy to implement a ModelChangeTracker which uses a combination of IEditableObject (to reset dirty states) and INotifyPropertyChanged.

You can implement it and create a pull request or request the feature at the official issue tracker:

http://www.catelproject.com/support/issue-tracker