How to consume INotifyPropertyChanged events

  • Thread starter Thread starter Bill McCormick
  • Start date Start date
B

Bill McCormick

I have a class that implements INotifyPropertyChanged. Parts of a UI are
bound to it, and they work as expected. However, how can I be notified of
certain property changing events without binding to it, so that I don't need
to create new event handlers?
 
I have a class that implements INotifyPropertyChanged. Parts of a UI are
bound to it, and they work as expected. However, how can I be notified of
certain property changing events without binding to it, so that I don't need
to create new event handlers?
Click to expand...

What exactly are you trying to accomplish?
Wouldn't the setter suffice?
 
What exactly are you trying to accomplish?
Wouldn't the setter suffice?
Click to expand...
When a property changes, the PropertyChanged PropertyChangedEventHandler is
called. I'd like to *hook* into that in the same way a binding consumer
object does so that I don't need to create separate events.

Thanks,

Bill
 
When a property changes, the PropertyChanged PropertyChangedEventHandler is
called. I'd like to *hook* into that in the same way a binding consumer
object does so that I don't need to create separate events.
Click to expand...

Have you tried

MyClass c = new MyClass();
c.PropertyChanged += OnPropertyChanged;
void OnPropertyChanged(object sender,
System.ComponentModel.PropertyChangedEventArgs e)
{
throw new NotImplementedException();
}

?
 
Have you tried

MyClass c = new MyClass();
c.PropertyChanged += OnPropertyChanged;
void OnPropertyChanged(object sender,
System.ComponentModel.PropertyChangedEventArgs e)
{
throw new NotImplementedException();
}

?
Click to expand...

Yes, thanks, I guess that's what I'm looking for. Except, since that would
get called for every property change and you'd need to check for which
property changed,

if(e.PropertyName == "TheOneProperty") {}


I think it's more efficient to fire off new events when the property of
interest actually does change.


Do you happen to know what the difference is between

c.PropertyChanged += OnPropertyChanged;

and

c.PropertyChanged += new
System.ComponentModel.PropertyChangedEventHandler(OnPropertyChanged);


Thanks,

Bill
 
Back
Top