连接到C＃中的COM事件 - 支持受管和非受管服务器 [英] Connect to COM events in C# - support both managed and unmanaged servers

问题描述

我正在编写需要连接到COM事件的C＃代码。我实现了使用
IConnectionPointContainer和IConnectionPoint，因此：

I'm writing C# code that needs to connect to COM events. I implemented the use of IConnectionPointContainer and IConnectionPoint thus:

      IConnectionPointContainer connectionPointContainer = internalGenerator as IConnectionPointContainer;
      if (connectionPointContainer == null)
      {
        Debug.Fail("The script generator doesn't support the required interface - IConnectionPointContainer");
        throw new InvalidCastException("The script generator doesn't support the required interface - IConnectionPointContainer");
      }
      Guid IID_IScriptGeneratorEvents = typeof(IScriptGeneratorCallback).GUID;
      connectionPointContainer.FindConnectionPoint(ref IID_IScriptGeneratorEvents, out m_connectionPoint);
      m_connectionPoint.Advise(this, out m_cookie);

$ b < .Net创建它，它将它作为.Net对象而不是COM对象处理。由于.Net对象没有实现IConnectionPointContainer接口，当试图将对象转换到该接口时，我会得到null。

The problem is that when the COM server is actually implemented in .Net (say, C#), after .Net creates it, it handles it as a .Net object, not a COM object. Since the .Net object doesn't implement the IConnectionPointContainer interface, I get null when trying to cast the object to that interface.

任何想法如何解决这个问题？
我当然可以在C＃COM服务器中实现IConnectionPointContainer，但是我想要一个更简单的解决方案，我可以很容易地解释给需要实现COM服务器的其他开发人员。

Any idea how can i workaround this? I can of course implement IConnectionPointContainer by myself in the C# COM server, however I would like a simpler solution, which I can easily explain to other developers which need to implement the COM server.

PS我必须使用IConnectionPointContainer作为COM服务器可以在非.NET（C ++，Java）中实现。

P.S I must use IConnectionPointContainer as the COM server may be implemented in non-.Net (C++, Java).

谢谢，
Inbar

Thanks, Inbar

推荐答案

我没有找到办法。
最后，我将在.Net中定义另一个接口，并将编写2个代码路径，一个用于.Net对象，一个用于真正的COM对象。

I didn't find a way to do this. Eventually I will define another interface in .Net and will write 2 code paths, one for .Net objects and one for real COM objects.

这篇关于连接到C＃中的COM事件 - 支持受管和非受管服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！