I am trying to figure out how to use IDataErrorInfo in a WPF application with SimpleMVVM.
I have implemented IDataErrorInfo on my model classes. And so far everything is working as expected. My validation rules are triggered when I tab from field to field on a WPF form and I set the style on the field to indicate a validation error.
The problem I have is that I want to bind the Save button (using DelegateCommand here) so that the Save button is enabled when the model is valid.
I have tried to create a property called IsValid on the model object and I have confirmed that this is being set correctly. I have tried listening for the INotifyPropertyChanged event on this property but I never receive it. I believe this is because I am
I have something like the following
this.Model.PropertyChanged += (s,e) =>
then in another method called after this
I suspect that since BeginEdit is making a clone of my model object, my changes and validations are happening on the clone but I have my property changed subscription on the original model object, so I never receive the property changed notifications and
the RaiseCanExecuteChanged method is never called.
Is there any way around this?