void OnValueChanged(object sender, ValueChangedEventArgs e)
{
InvalidateCache(sender, e.PropertyDescriptor);
}
void OnValueChanged(object sender, ValueChangedEventArgs e)
{
if (IsExtendedTraceEnabled(TraceDataLevel.Events))
{
TraceData.Trace(TraceEventType.Warning,
TraceData.GotEvent(
TraceData.Identify(_host.ParentBindingExpression),
"ValueChanged",
TraceData.Identify(sender)));
}
_host.OnSourcePropertyChanged(sender, e.PropertyDescriptor.Name);
}
public ValueChangedRecord(ValueChangedEventManager manager, object source, PropertyDescriptor pd)
{
// keep a strong reference to the source. Normally we avoid this, but
// it's OK here since its scope is exactly the same as the strong reference
// held by the PD: begins with pd.AddValueChanged, ends with
// pd.RemoveValueChanged. This ensures that we _can_ call RemoveValueChanged
// even in cases where the source implements value-semantics (which
// confuses the PD - see 795205).
_manager = manager;
_source = source;
_pd = pd;
_eventArgs = new ValueChangedEventArgs(pd);
pd.AddValueChanged(source, new EventHandler(OnValueChanged));
}