C++ String: How to convert between 'CString' and 'std::string'?

'CString' to 'std::string':

std::string cannot always construct from a LPCTSTR i.e. the code will fail for UNICODE builds.

So the following conversion will lead to error:

CString cs("Hello");
std::string s((LPCTSTR)cs);

As std::string can construct only from LPSTR / LPCSTR, a programmer who uses VC++ 7.x or better can utilize conversion classes such as CT2CA as an intermediary.

  CString cs ("Hello");
  // Convert a TCHAR string to a LPCSTR
  CT2CA pszConvertedAnsiString (cs);
  // construct a std::string using the LPCSTR input
  std::string strStd (pszConvertedAnsiString);

 

'std::string' to 'CString':

std::string s("Hello");
CString cs(s.c_str());