=====================此方法在PPC上可编译通过 ,并且正常使用=======================
转自:Siddhartha Rao
// 传统的方法在VS2005的PPC平台上无法编译通过,或者不起作用,要么需要两次转换
//CString->bstr,bstr->string或Cstring->wchar * ->char *等
There are really many ways to do it.
But, the simplest one is just this -
CString strSomeCstring ("This is a CString Object");
// Use ANSI variant CStringA to convert to char*; construct from it -
std::string strStdString (CStringA (strSomeCstring));
Note that as discussed in this post, CStringA is a template specialization of class CStringT for type char avaÃlable with Visual Studio 7.x and better.
=======================以下介绍Cstring与其他数据类型的转换========================
转自 :LEO
![](/Images/OutliningIndicators/ContractedBlock.gif)
Code
wchar_t*,wchar_t,wchat_t数组,char,char*,char数组,std::string,std::wstring,CString
//////////////////////////////////////////////////////////////////////
#include <string>
// 使用CString必须使用MFC,并且不可包含<windows.h>
#define _AFXDLL
#include <afx.h>
using namespace std;
//----------------------------------------------------------------------------------
//将 单字节char* 转换为 宽字节 wchar*
inline wchar_t* AnsiToUnicode( const char* szStr )
{
int nLen = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, NULL, 0 );
if (nLen == 0)
{
return NULL;
}
wchar_t* pResult = new wchar_t[nLen];
MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, pResult, nLen );
return pResult;
}
//----------------------------------------------------------------------------------
// 将 宽字节wchar_t* 转换 单字节char*
inline char* UnicodeToAnsi( const wchar_t* szStr )
{
int nLen = WideCharToMultiByte( CP_ACP, 0, szStr, -1, NULL, 0, NULL, NULL );
if (nLen == 0)
{
return NULL;
}
char* pResult = new char[nLen];
WideCharToMultiByte( CP_ACP, 0, szStr, -1, pResult, nLen, NULL, NULL );
return pResult;
}
//----------------------------------------------------------------------------------
// 将单字符 string 转换为宽字符 wstring
inline void Ascii2WideString( const std::string& szStr, std::wstring& wszStr )
{
int nLength = MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, NULL, NULL );
wszStr.resize(nLength);
LPWSTR lpwszStr = new wchar_t[nLength];
MultiByteToWideChar( CP_ACP, 0, szStr.c_str(), -1, lpwszStr, nLength );
wszStr = lpwszStr;
delete [] lpwszStr;
}
//----------------------------------------------------------------------------------
int _tmain(int argc, _TCHAR* argv[])
{
char* pChar = "我喜欢char";
wchar_t* pWideChar = L"我讨厌wchar_t";
wchar_t tagWideCharList[100] ;
char ch = 'A';
char tagChar[100] = {NULL};
CString cStr;
std::string str;
// 注:设置语言环境以便输出WideChar
setlocale(LC_ALL,"chs");
// 注: char* 转换 wchar_t*
// 注: wchar_t 未重载 << ,所以不可使用 cout << 输出
pWideChar = AnsiToUnicode( pChar );
// 注:printf("%ls") 和 wprintf(L"%s") 一致
printf( "%ls\n", pWideChar );
// 注:wchar_t* 转换 wchar_t[]
wcscpy ( tagWideCharList, pWideChar );
wprintf( L"%s\n", tagWideCharList );
// 注:wchar_t[] 转换 wchar_t*
pWideChar = tagWideCharList;
wprintf( L"%s\n", pWideChar );
// 注:char 转换 string
str.insert( str.begin(), ch );
cout << str << endl;
// 注:wchar_t* 转换 string
pWideChar = new wchar_t[str.length()];
swprintf( pWideChar, L"%s", str.c_str());
wprintf( L"%s\n", pWideChar );
// 注:string 转换 char*
pChar = const_cast<char*>(str.c_str());
cout << pChar << endl;
// 注:char* 转换 string
str = std::string(pChar);
// 注: cout 的 << 重载了string, 若printf 的话必须 printf("%s", str.c_str());
// 而不可 print( "%s", str ); 因为 str 是个 string 类
cout << str << endl;
// 注:string 转换 char[]
str = "无聊啊无聊";
strcpy( tagChar, str.c_str() );
printf( "%s\n", tagChar );
// 注:string 转换 CString;
cStr = str.c_str();
// 注:CString 转换 string
str = string(cStr.GetBuffer(cStr.GetLength()));
// 注:char* 转换 CString
cStr = pChar;
// 注:CString 转换 char*
pChar = cStr.GetBuffer( cStr.GetLength() );
// 注:CString 转换 char[]
strncpy( tagChar, (LPCTSTR)CString, sizeof(tagChar));
// 注:CString 转换 wchar_t*
pWideChar = cStr.AllocSysString();
printf( "%ls\n", pWideChar );
}