.NET WinForms INotifyPropertyChanged updates all bindings when one is changed. Better way?

Question

In a windows forms application, a property change that triggers INotifyPropertyChanged, will result in the form reading EVERY property from my bound object, not just the pro

Answer 1

I'm testing subclassing binding like this and managing OnPropertyChanged, maybe helps you.

public class apBinding : Binding
{

        public apBinding(string propertyName, INotifyPropertyChanged dataSource, string dataMember)
            : base(propertyName, dataSource, dataMember)
        {
            this.ControlUpdateMode = ControlUpdateMode.Never;
            dataSource.PropertyChanged += new PropertyChangedEventHandler(OnPropertyChanged);
        }

        private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
        {

            if (e.PropertyName == this.BindingMemberInfo.BindingField)
            {
                 this.ReadValue();
            }
        }
    }

Now the problem that i find is that the control overwrites the value of the linked object, so i modified to

public class apBinding : Binding
{

        public apBinding(string propertyName, INotifyPropertyChanged dataSource, string dataMember)
            : base(propertyName, dataSource, dataMember)
        {

            dataSource.PropertyChanged += new PropertyChangedEventHandler(OnPropertyChanged);
        }

        private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            this.ControlUpdateMode = ControlUpdateMode.Never;
            if (e.PropertyName == this.BindingMemberInfo.BindingField)
            {
                 this.ReadValue();
            }
        }
    }

then the first time propertychanges is called i disable controlupdate. and the control is correctly updated at the first run.