CString和string的转换

//从CString转换到string
CString str1 = "ABC";
string str2 = str1.GetBuffer();

//从string转换到CString
string str1 = "ABC";
CString str2 = str1.c_str();

// 
/* 
*********************************************************************** 
* 函数： TransCStringToTCHAR 
* 描述：将CString 转换为 TCHAR* 
* 日期：
*********************************************************************** 
*/ 
TCHAR* CPublic::CString2TCHAR(CString &str) 
{ 
int iLen = str.GetLength(); 
TCHAR* szRs = new TCHAR[iLen]; 
lstrcpy(szRs, str.GetBuffer(iLen)); 
str.ReleaseBuffer(); 
return szRs; 
} 
 
/* 
*********************************************************************** 
* 函数： TCHAR2Char 
* 描述：将TCHAR* 转换为 char* 
* 日期：
*********************************************************************** 
*/ 
char* TCHAR2char(TCHAR* tchStr) 
{ 
int iLen = 2*wcslen(tchStr);//CString,TCHAR汉字算一个字符，因此不用普通计算长度 
char* chRtn = new char[iLen+1] 
wcstombs(chRtn,tchStr,iLen+1);//转换成功返回为非负值 
return chRtn; 
} 
 
/*
*********************************************************************** 
* 函数： char2tchar
* 描述：将 char* 转换为 TCHAR*
* 日期：
*********************************************************************** 
*/ 
TCHAR *char2tchar(char *str)
{
int iLen = strlen(str);
TCHAR *chRtn = new TCHAR[iLen+1];
mbstowcs(chRtn, str, iLen+1); return chRtn;
}
 
/* 
*********************************************************************** 
* 函数： CString2char 
* 描述：将CString转换为 char* 
* 日期：
*********************************************************************** 
*/ 
char* CPublic::CString2char(CString &str) 
{ 
int len = str.GetLength(); 
char* chRtn = (char*)malloc((len*2+1)*sizeof(char));//CString的长度中汉字算一个长度 
memset(chRtn, 0, 2*len+1); 
USES_CONVERSION; 
strcpy((LPSTR)chRtn,OLE2A(str.LockBuffer())); 
return chRtn; 
}

wstring AnsiToUnicode(( const string& str )
{
int   len = 0;
len = str.length();
int   unicodeLen = ::MultiByteToWideChar( CP_ACP, 0, str.c_str(),-1,NULL,0 );  
wchar_t *   pUnicode;  
pUnicode = new   wchar_t[unicodeLen+1];  
memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));  
::MultiByteToWideChar( CP_ACP,0, str.c_str(),-1, (LPWSTR)pUnicode, unicodeLen );  
wstring   rt;  
rt = ( wchar_t* )pUnicode;
delete   pUnicode; 
return   rt;  
}
string UnicodeToAnsi( const wstring& str )
{
char*      pElementText;
int     iTextLen;
// wide char to multi char
iTextLen = WideCharToMultiByte( CP_ACP, 0, str.c_str(), -1, NULL, 0, NULL, NULL );
pElementText = new char[iTextLen + 1];
memset( ( void* )pElementText, 0, sizeof( char ) * ( iTextLen + 1 ) );
::WideCharToMultiByte( CP_ACP, 0, str.c_str(), -1, pElementText,iTextLen,NULL,NULL );
string strText;
strText = pElementText;
delete[] pElementText;
return strText;
}


wstring UTF8ToUnicode(( const string& str )
{
int   len = 0;
len = str.length();
int   unicodeLen = ::MultiByteToWideChar( CP_UTF8, 0, str.c_str(),-1,NULL,0 );  
wchar_t *   pUnicode;  
pUnicode = new   wchar_t[unicodeLen+1];  
memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));  
::MultiByteToWideChar( CP_UTF8,0, str.c_str(),-1, (LPWSTR)pUnicode, unicodeLen );  
wstring   rt;  
rt = ( wchar_t* )pUnicode;
delete   pUnicode; 
return   rt;  
}

string UnicodeToUTF8( const wstring& str )
{
char*      pElementText;
int     iTextLen;
// wide char to multi char
iTextLen = WideCharToMultiByte( CP_UTF8, 0, str.c_str(), -1, NULL, 0, NULL, NULL );
pElementText = new char[iTextLen + 1];
memset( ( void* )pElementText, 0, sizeof( char ) * ( iTextLen + 1 ) );
::WideCharToMultiByte( CP_UTF8, 0, str.c_str(), -1, pElementText,iTextLen,NULL,NULL );
string strText;
strText = pElementText;
delete[] pElementText;

return strText;
}