CODEWITHSUNDEEP
c#c++generics
viky
viky

Reputation: 21

Using ICollection interface in Native C++ code

I am trying to create an ICollection Interface pointer in Native C++ code using the below piece of code.

ICollectionPtr ptrPopItems (__uuidof(mscorlib::ICollection));

But I am getting a compliation error saying "Class not registered". Can someone help in solving this error?

Upvotes: 2

Views: 1063

Answers (1)

Lou Franco
Lou Franco

Reputation: 89222

ICollection is not a COM object, which is what you would need for something like that to work. You need something like:

ICollection^ ptrPopItems = gcnew ArrayList();

ICollection is an interface, so you need to set it to an instance of a concrete class that implements its interace. The ^ is a pointer to a managed object and gcnew calls the managed new to create the object.

Take a look at this C++/CLI page on Wikipedia to learn more

http://en.wikipedia.org/wiki/C%2B%2B/CLI

EDIT: If you need to use C++ without the managed extensions, then you need to create classes in C# that do what you want and add the ComVisible attribute to the classes you want to expose.

http://msdn.microsoft.com/en-us/library/7fcfby2t.aspx

Upvotes: 1

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