非托管字符串和托管字符串的转换

#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); //以下为托管代码 #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; } //将非托管的ANSI字符串转换成托管字符串  String^ UnmanagedStringA2ManagedString(char *pIn) { String^ strOut = Marshal::PtrToStringAnsi(static_cast<IntPtr>(pIn)); return strOut; } //将托管字符串转换成非托管的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; } //以下为非托管代码  #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; }