// use this when the command is owned by the source object - i.e. we aren't concerned about their relative lifespans
public static perCommandBase ObservesInternalProperty(this perCommandBase command, INotifyPropertyChanged source, string propertyName)
{
source.PropertyChanged += (s, e) =>
{
if (string.Equals(e.PropertyName, propertyName, StringComparison.InvariantCultureIgnoreCase))
{
command.RaiseCanExecuteChanged();
}
};
return(command);
}
public static perCommandBase ObservesCollection(this perCommandBase command, INotifyCollectionChanged collection)
{
collection.CollectionChanged += (s, e) => command.RaiseCanExecuteChanged();
return(command);
}
