C＃ - 如何在运行时的COM组件类测试是用来实例化一个接口？ [英] C# - How to test at runtime which COM coclass was used to instantiate an interface?
问题描述
假设你有一个COM接口 ICOMInterface 由组件类实施 Coclass1 和 Coclass2 。无论这些组件类都有自己的接口（为简单起见，并说明我的问题）。
Suppose you have a COM interface ICOMInterface that is implemented by coclasses Coclass1 and Coclass2. Neither of these coclasses have interfaces of their own (for simplicity's sake and to illustrate my issue).
在C＃中，你可以从一个组件类创建一个COM接口的实例像这样：
In C#, you can create an instance of a COM interface from a coclass like so:
ICOMInterface myComInterface = new Coclass1();
现在，你怎么能确定是否 myComInterface 由 Coclass1 或 Coclass2 ？
Now, how can you determine whether myComInterface was instantiated by Coclass1 or Coclass2?
使用实例是语句就像如下总是返回true，因此是无用的用于这一目的。
Using the "is" statement like follows always returns true, and as such is useless for this purpose.
Debug.WriteLine(myComInterface is Coclass1) // writes "True"
Debug.WriteLine(myComInterface is Coclass2) // writes "True"
这将工作，如果我在测试接口，而不是组件类，但这些组件类没有一个比他们都实现其他接口， ICOMInterface 。
This would work if I was testing interfaces, not coclasses, but these coclasses do not have interfaces other than the one they both implement, ICOMInterface.
我希望有一个简单的答案，这是我可以俯瞰比较通用的情况下，否则，如果需要的话我可以发布更具体的细节。
I am hoping that there is a simple answer to this rather generic scenario that I am overlooking, otherwise I can post more specific details if required.
感谢您的帮助。
推荐答案
如果COM对象实现的 的IPersist接口，你可以通过它的IPersist CLSID： ：的GetClassID（）方法。这可能是所有你需要知道你正在使用什么课。您也可以通过WinAPI的获得人类可读的进程id ProgIDFromCLSID（）法
If the COM object implements the IPersist interface, you can get its CLSID through the IPersist::GetClassID() method. This may be all you need to know what class you're working with. You can also get the human-readable ProgID through the WinAPI ProgIDFromCLSID() method.
在这里看到：<一HREF =http://stackoverflow.com/questions/1253368/c-get-progid-from-com-object> http://stackoverflow.com/questions/1253368/c-get-progid-from-com-反对
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