C++調用C#類庫 && 非託管C++字符串和託管字符串的轉換

 

C#代碼

using System;

using System.Collections.Generic;

using System.Text;

 

namespace TestClassLibrary

{

public class Test

{

public int TestAdd(int x, int y)

{

return x + y;

}

public string TestString(string str1, string str2)

{

string strb = str1 + str2;

return strb;

}

}

}

 

C++代碼

#pragma warning (disable: 4278)

 

#include <iostream>

#include <Windows.h>

#include <tchar.h>

#include <vcclr.h>

#using <mscorlib.dll>

#using "..//Debug//TestClassLibrary.dll"

 

using namespace std;

using namespace TestClassLibrary;

using namespace System;

using namespace System::Runtime::InteropServices;

 

int TestInt(int, int);

char* TestString(char *pStr1, char *pStr2);

String^ UnmanagedStringA2ManagedString(char *pIn);

char* ManagedString2UnmanagedStringA(String^ strIn);

 

//以下爲託管代碼

#pragma managed

int TestInt(int x, int y)

{   

Test t;

return t.TestAdd(x, y);

}

 

char* TestString(char *pStr1, char *pStr2)

{

Test t;

String ^str1, ^str2;

str1 = UnmanagedStringA2ManagedString(pStr1);

str2 = UnmanagedStringA2ManagedString(pStr2);

String^ s = t.TestString(str1, str2);

char *pResult = ManagedString2UnmanagedStringA(s);

return pResult;

}

 

//將非託管的ANSI字符串轉換成託管字符串 

String^ UnmanagedStringA2ManagedString(char *pIn)

{

String^ strOut = Marshal::PtrToStringAnsi(static_cast<IntPtr>(pIn));

return strOut;

}

 

//將託管字符串轉換成非託管的ANSI字符串 

char* ManagedString2UnmanagedStringA(String^ strIn)

{

IntPtr ip = Marshal::StringToHGlobalAnsi(strIn);

const char* pTemp = static_cast<const char*>(ip.ToPointer());

char *pOut = new char[strlen(pTemp)+1];

strcpy(pOut, pTemp);

Marshal::FreeHGlobal( ip );

return pOut;

}

 

//以下爲非託管代碼 

#pragma unmanaged

void _tmain()

{

int x(1), y(1), iResult;

char *pStr1 = "Str1.";

char *pStr2 = "Str2.";

char *pResult;

DWORD dwStart, dwEnd;

 

iResult = TestInt(x, y);

pResult = TestString(pStr1, pStr2);

cout<<"TestInt:/nx="<<x<<" y="<<y<<"/nresult:"<<iResult<<endl<<endl;

cout<<"TestSting:/nStr1="<<pStr1<<" Str2="<<pStr2<<"/nresult:"<<pResult<<endl;

cin>>iResult;   

}

 

運行結果