WPF Binding without path with converter, update

Question

I have a binding without path using a converter. This is because the converter will use many properties of the object to build the text for the tooltip. But when one property ch

Answer 1

If you implement the INotifyPropertyChange interface on a data type class, that takes care of notifying for changes to the class properties. If you implement the INotifyPropertyChange interface on a view model class that has a property of the type of your class, then that takes care of notifying for changes to that property, which in this case is the whole object.

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UPDATE >>>

Right... I believe that you have a property of type ObservableCollection. If you add a PropertyChanged handler to each of the items...:

foreach (Bar item in YourCollectionProperty) item.PropertyChanged += 
Item_PropertyChanged;

... then you can do this:

private void Item_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
    NotifyPropertyChanged("YourCollectionProperty");
}