private void TargetOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
{
switch (args.Action)
{
case NotifyCollectionChangedAction.Add:
if (args.NewItems != null)
{
foreach (var item in args.NewItems)
{
AddItem(sender, item);
}
}
else
{
throw new Exception("NewItems was null");
}
break;
case NotifyCollectionChangedAction.Remove:
if (args.OldItems != null)
{
foreach (var item in args.OldItems)
{
RemoveItem(sender, item);
}
}
else
{
throw new Exception("OldItems was null");
}
break;
case NotifyCollectionChangedAction.Move:
case NotifyCollectionChangedAction.Replace:
case NotifyCollectionChangedAction.Reset:
ExtendedPropertyChanged?.Invoke(sender, new ExtendedPropertyChangedEventArgs("Item", null, null));
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public void InitialRegisterValue(Type type)
{
if (_property.DeclaringType != type)
{
return;
}
//if (ExtendedPropertyChanged == null) return;
if (_target.GetType().GetProperty(Name).GetMethod != _property.GetMethod)
{
return;
}
var value = _property.GetValue(_target);
var oldValue = Interlocked.Exchange(ref _value, value);
if (ReferenceEquals(oldValue, value))
{
return;
}
ExtendedPropertyChanged?.Invoke(_target, new ExtendedPropertyChangedEventArgs(Name, oldValue, _value));
}
private void RemoveItem(object sender, object item)
{
ExtendedPropertyChanged?.Invoke(sender, new ExtendedPropertyChangedEventArgs("Item", item, null));
}
