如何使用IPropertyNotifySink将属性更改的通知从C＃触发到COM？

Question

I am going crazy on this problem for the past couple of weeks. I have a C# Com object that needs to send property change notifications to a C++ Com object. An equivalent in VB would be using code that looks as follows PropertyChanged "propertyName".

In C++ the equivalent to use the CFirePropNotifyEvent class from ATL.

The C++ COM and VB COM objects do not implement a specialized events interface, so the equivalent are give above.. The C++ COM object that needs to sink the event is based around IPropertyNotifySink, afaik.

What is the equivalent in C#? i have tried:

1. INotifyPropertyChanged from System.ComponentModel
2. I implemented IObjectWithSite and tried to cast the site object received in setSite to IPropertyNotifySink.
   1. I cannot find an equivalent for CFirePropNotifyEvent in C++/ATL which is what the C++ code uses..

Please help..

Thanks in Advance..

Answer 1

I don't think there is some automatic gateway between .NET's INotifyPropertyChanged and COM's INotifyPropertySink.

If you want a .NET object to provide COM events, you need to provide an implementation of IConnectionPointContainer in these .NET objects.

IConnectionPointContainer already exists in .NET in the System.Runtime.InteropServices.ComType s namespace.