C++ .NET convert System::String to std::string

Question

How do you convert System::String to std::string in C++ .NET?

Answer 1

There is cleaner syntax if you're using a recent version of .net

#include "stdafx.h" #include <string>  #include <msclr\marshal_cppstd.h>  using namespace System;  int main(array<System::String ^> ^args) {     System::String^ managedString = "test";      msclr::interop::marshal_context context;     std::string standardString = context.marshal_as<std::string>(managedString);      return 0; } 

This also gives you better clean-up in the face of exceptions.

There is an msdn article for various other conversions

Answer 2

And in response to the "easier way" in later versions of C++/CLI, you can do it without the marshal_context. I know this works in Visual Studio 2010; not sure about prior to that.

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#include "stdafx.h" #include <string>  #include <msclr\marshal_cppstd.h>  using namespace msclr::interop;  int main(array<System::String ^> ^args) {     System::String^ managedString = "test";      std::string standardString = marshal_as<std::string>(managedString);      return 0; } 

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