Question:
I have a hierarchy of objects (objects A, B), each of which implements INotifyPropertyChanged such that...
A has a member of type B, B has a member of C, C is of type bool
When C changes, its PropertyChanged event gets fired, however this does not fire B's property changed event. And therefore A does not react to B's change.
Is there a good way to bubble this up?
Solution:1
This is great - I have to spend some more time looking at it. Thank you.
I found a different solution but it's a bit of a hack. I just set my binding path property to the nested type. Using my example above, in my xaml (which has a DataContext of object A) I set my binding as...
{Binding Path=B.C}
Bubbling the event up is definitely more elegant.
Solution:2
This is a fairly simplistic solution but can't you just subscribe to the PropertyChanged event and propagate the call?
E.G.
MyContainedObject.PropertyChanged += PropertyChangedHandler; and then in your handler:
private void PropertyChangedHandler(object sender, PropertyChangedEventArgs e) { this.OnPropertyChanged(e.PropertyName); } This works great when your objects have properties with the same name. If you have properties with different names you will have to do a bit more work to convert between the property values.
private void PropertyChangedHandler(object sender, PropertyChangedEventArgs e) { switch(e.PropertyName) { case "Property1": this.OnPropertyChanged("ADifferentProperty1"); break; case "Property2": this.OnPropertyChanged("ADifferentProperty2"); break; default: this.OnPropertyChanged(e.PropertyName); break; } } Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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