C++ Programmer's Cookbook

# re: CLI中native的string和System::String轉(zhuǎn)化 2008-03-20 00:28 七星重劍

呵呵，這個(gè)當(dāng)年我也整過(guò)，不過(guò)是項(xiàng)目經(jīng)理搞定的  回復(fù)  更多評(píng)論   

# re: CLI中native的string和System::String轉(zhuǎn)化 2008-05-04 11:26 陳梓瀚(vczh)

無(wú)論如何還是要建立一個(gè)c++/cli工程，然后原來(lái)的部分使用#pragma unmanaged編譯，然后再用c++/cli加一個(gè)殼。c#的工程引用這個(gè)工程就行了。不過(guò)還是做成dll好。

至于他們的互相轉(zhuǎn)換我是這樣做的：
System::String^ ConvertString(const freescript::FsString& Source)
{
return gcnew System::String(Source.w_str());
}

freescript::FsString ConvertString(System::String^ Source)
{
System::IntPtr Pointer=System::Runtime::InteropServices::Marshal::StringToCoTaskMemUni(Source);
wchar_t* Buffer=(wchar_t*)(void*)(Pointer);
freescript::FsString Result=Buffer;
System::Runtime::InteropServices::Marshal::FreeCoTaskMem(Pointer);
return Result;
}  回復(fù)  更多評(píng)論   

# re: CLI中native的string和System::String轉(zhuǎn)化 2008-07-17 14:33 夢(mèng)在天涯

// convert_system_string.cpp
// compile with: /clr
#include <string>
#include <iostream>
using namespace std;
using namespace System;

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));
}

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

int main() {
string a = "test";
wstring b = L"test2";
String ^ c = gcnew String("abcd");

cout << a << endl;
MarshalString(c, a);
c = "efgh";
MarshalString(c, b);
cout << a << endl;
wcout << b << endl;
}  回復(fù)  更多評(píng)論   

# re: CLI中native的string和System::String轉(zhuǎn)化 2008-07-17 14:34 夢(mèng)在天涯

// convert_string_to_wchar.cpp
// compile with: /clr
#include < stdio.h >
#include < stdlib.h >
#include < vcclr.h >

using namespace System;

int main() {
String ^str = "Hello";

// Pin memory so GC can't move it while native function is called
pin_ptr<const wchar_t> wch = PtrToStringChars(str);
printf_s("%S\n", wch);

// Conversion to char* :
// Can just convert wchar_t* to char* using one of the
// conversion functions such as:
// WideCharToMultiByte()
// wcstombs_s()
// ... etc
size_t convertedChars = 0;
size_t sizeInBytes = ((str->Length + 1) * 2);
errno_t err = 0;
char *ch = (char *)malloc(sizeInBytes);

err = wcstombs_s(&convertedChars,
ch, sizeInBytes,
wch, sizeInBytes);
if (err != 0)
printf_s("wcstombs_s failed!\n");

printf_s("%s\n", ch);
}  回復(fù)  更多評(píng)論