WCF COM Interop With Complex Types

Question

I want to create a WCF service with COM Interop with which I need to pass complex data. Preferrably an array of custom class objects. I am not sure how to achieve this and there is a lack of decent examples.

I only found one similar question on Stackoverflow here

Calling C# From Unmanaged C++ Passing Or Returning "Complex" Types

However, the solution was to just use a C++/CLI dll instead but this is not an option for me. The C++ application that will call it statically links the C++ runtime and I have been told that this mustn't be changed.

Maybe this can be usefull: http://codereply.com/answer/3qkhjy/create-wcf-service-unmanaged-c-clients.html — Ricardo Pontual, Jul 13 '15 at 19:49
So to clarify, you want to call a WCF service from a com application? Why do you need com interop for this? — tom redfern, Jul 14 '15 at 08:20

score 1 · Accepted Answer · answered Jul 14 '15 at 09:33

I want to create a WCF service with COM Interop

OK, but what direction do you want the call to go? For COM -> .Net you need to create a COM Callable Wrapper. For .Net -> COM you need to create a Runtime Callable Wrapper.

It sounds like you are trying to call .Net from COM, but then this begs the question why are you trying to call a WCF service via interop? If you want to call the service, then consume the service endpoint and call them.

score 0 · Answer 2 · answered Jul 14 '15 at 17:25

Approach is unclear to me. I am not pretty much sure but same problem came to me for desktop App , If you want to use COM components better have a wrapper(RCW) around COM where you refer to PIAs(Primary interop Assemblies)

And then from your main Project(WCF service) refer to this wrapper project instead of directly refering to COM.

WCF COM Interop With Complex Types

2 Answers2

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