I am wondering what's the way to call a c# class method from C++(Native, not C++ CLI) code? Need simple and elegant way
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4As cool as it may be the thought hurtsuser34537– user345372010-11-26 06:36:41 +00:00Commented Nov 26, 2010 at 6:36
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1possible duplicate of Calling C# code from C++cdiggins– cdiggins2014-04-21 16:21:05 +00:00Commented Apr 21, 2014 at 16:21
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4 Answers
You can embed any CLR assembly (C#, VB.NET, F#, ...) in a native C++ program using what's called "CLR Hosting". This is how native programs (such as SQL Server) support .NET code extensions. E.g. SQL CLR in SQL Server.
You load the CLR into a native process using CorBindToRuntimeEx() for .NET 2.0 and CLRCreateInstance() in .NET 4.
Details can be found on MSDN, or Jeff Richter's book CLR via C#.
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Turn your C# assembly into a COM visible one and use COM interfaces. That is the only way to make it work beside self made IPC as far as I know. The problem comes from the .NET environment under which the .NET assembly must run and C++ runs under its native C++ environment.
The only way of communicating is either an IPC mechanism (sockets, ...) or use COM, as the processes have to be "decoupled".
Here is a tutorial for the COM based solution:
Sasha Goldshtein is the man for this stuff:
There are again several ways to do it: 1. Reverse P/Invoke (has to start from .NET delegate passed as callback, so this is only good if the "action" begins in your .NET code); 2. COM interop (every .NET class can also be a COM object, with or without explicit interfaces); 3. C++/CLI wrapper classes.
See http://blogs.microsoft.co.il/blogs/sasha/archive/2008/02/16/net-to-c-bridge.aspx
See also :
http://www.gregcons.com/KateBlog/CallingManagedCodeFromNativeCode.aspx
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the simplest way is to use C++/CLI. If you can't use that in your code, write a wrapper dll and call that dll.
