�� System::String � Char * � Visual C++

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� �� .NET Framework �� :

System::Runtime::InteropServices
Msclr::Interop

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� �� System::String � char * �� :

�� C++ � Microsoft Visual C++ .NET 2002 � Microsoft Visual C++ .NET 2003
C + +/ CLI � Microsoft Visual C++ 2005 � � Microsoft Visual C++ 2008

�� 1

PtrToStringChars �� String. �� , �� , �� :

//#include <vcclr.h>
System::String * str = S"Hello world\n";
const __wchar_t __pin * str1 = PtrToStringChars(str);
wprintf(str1);

�� 2

StringToHGlobalAnsi �� String � �� (ANSI) �� . �� :

//using namespace System::Runtime::InteropServices;
System::String * str = S"Hello world\n";
char* str2 = (char*)(void*)Marshal::StringToHGlobalAnsi(str);
printf(str2);
Marshal::FreeHGlobal(str2);

�� � Visual C++ 2005 � Visual C++ 2008, �� (/ CLR: oldSyntax) �� . �� , �� .

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� �� , �� �� Common Language Runtime, �� (/ CLR: oldSyntax) � �� CLR �� .
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�� -�� Microsoft Developer Network (MSDN):

http://msdn2.Microsoft.com/en-us/library/k8d11d4s.aspx

(http://msdn2.microsoft.com/en-us/library/k8d11d4s.aspx)

�� .

�� 3

�� VC7 CString �� , �� CString � �� .

//#include <atlstr.h>
System::String * str = S"Hello world\n";
CString str3(str); 
printf(str3);

�� 4

�� Visual C++ 2008 marshal_as<T> </T> �� marshal marshal_context() .

//#include <msclr/marshal.h>
//using namespace msclr::interop;
marshal_context ^ context = gcnew marshal_context();
const char* str4 = context->marshal_as<const char*>(str);
puts(str4);
delete context;

�� �� C++ � Visual C++ .NET 2002 �� Visual C++ .NET 2003. �� C + +/ CLI ��, �� Visual C++ 2005 � �� msclr , �� Visaul C++ 2008. �� , �� /clr/CLR C++ � Microsoft Visual C++ 2008.

�� C++ �� (Visual C++ 2002 � Visual C++ 2003)

//compiler option: cl /clr  
#include <vcclr.h>
#include <atlstr.h>
#include <stdio.h>
#using <mscorlib.dll>
using namespace System;
using namespace System::Runtime::InteropServices;

int _tmain(void)
{
   	System::String * str = S"Hello world\n";

	//method 1
	const __wchar_t __pin * str1 = PtrToStringChars(str);
	wprintf(str1);	

	//method 2
	char* str2 = (char*)(void*)Marshal::StringToHGlobalAnsi(str);
	printf(str2);
	Marshal::FreeHGlobal(str2);

	//method 3
	CString str3(str); 
	wprintf(str3);

    return 0;
}

C + +/ CLI �� (Visual C++ 2005 � Visual C++ 2008)

//compiler option: cl /clr 

#include <atlstr.h>
#include <stdio.h>
#using <mscorlib.dll>

using namespace System;
using namespace System::Runtime::InteropServices;

#if _MSC_VER > 1499 // Visual C++ 2008 only
#include <msclr/marshal.h>
using namespace msclr::interop;
#endif 

int _tmain(void)
{
		     System::String ^ str = "Hello world\n";

	     /method 1
	     pin_ptr<const wchar_t> str1 = PtrToStringChars(str);
     	wprintf(str1);	

	     //method 2
	     char* str2 = (char*)Marshal::StringToHGlobalAnsi(str).ToPointer();
     	printf(str2);
	     Marshal::FreeHGlobal((IntPtr)str2);

	     //method 3
	     CString str3(str); 
	     wprintf(str3);

     	//method 4
#if _MSC_VER > 1499 // Visual C++ 2008 only
	     marshal_context ^ context = gcnew marshal_context();
	     const char* str4 = context->marshal_as<const char*>(str);
     	puts(str4);
	     delete context;
#endif

	return 0;
}