char wchar 互转 多字符 宽字符 的N种方式

1:  用 CString  如果没有mfc 可以用 ATL 中的 CString  #include <atlstr.h>

    CStringA v1 = "111";

    CStringW v2 = "222";

    v2 = v1;

2  : 

#include <string>

std::string ws2s(const std::wstring& ws)

{

std::string curLocale = setlocale(LC_ALL, NULL); // curLocale = "C";

setlocale(LC_ALL, "chs");

const wchar_t* _Source = ws.c_str();

size_t _Dsize = 2 * ws.size() + 1;

char *_Dest = new char[_Dsize];

memset(_Dest,0,_Dsize);

wcstombs(_Dest,_Source,_Dsize);

std::string result = _Dest;

delete []_Dest;

setlocale(LC_ALL, curLocale.c_str());

return result;

}

std::wstring s2ws(const std::string& s)

{

std::string curLocale = setlocale(LC_ALL, NULL); // curLocale = "C";

setlocale(LC_ALL, "chs"); 

const char* _Source = s.c_str();

size_t _Dsize = s.size() + 1;

wchar_t *_Dest = new wchar_t[_Dsize];

wmemset(_Dest, 0, _Dsize);

mbstowcs(_Dest,_Source,_Dsize);

std::wstring result = _Dest;

delete []_Dest;

setlocale(LC_ALL, curLocale.c_str());

return result;

}

3:A2W  W2A

     #include <atlconv.h>  

     USES_CONVERSION;  

     DoSomething(A2W("SomeString"));  

使用要谨慎:http://blog.csdn.net/educast/article/details/11900031

4:

    #include <comdef.h>

    _bstr_t bstrText("Hello");

    char* szText=bstrText;

    wchar_t* wszText=bstrText;

参考:

http://lab.yqc.im/cpp-string-type-conversion.html

http://blog.csdn.net/jia_xiaoxin/article/details/2840237

http://www.cnblogs.com/fire-phoenix/archive/2010/09/04/1818248.html

来自为知笔记(Wiz)