Question

I faced a problem cannot convert parameter from 'System::String ^' to 'std::string'. How can i convert System::String^ into standard C++ string in Visual C++ environment ?

Answer 1

From this link at Microsoft:

void MarshalString ( String ^ s, string& os ) {
    using namespace Runtime::InteropServices;
    const char* chars = 
       (const char*)(Marshal::StringToHGlobalAnsi(s)).ToPointer();
    os = chars;
    Marshal::FreeHGlobal(IntPtr((void*)chars));
}

int main() {
    string a = "test";
    String ^ c = gcnew String("abcd");
    cout << a << endl;
    MarshalString(c, a);
    cout << a << endl;
}