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

Q: How to convert between 'CString' and 'std::string'?

A:

'CString' to 'std::string':

Code:

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

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'std::string' to 'CString':

Code:

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

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Quote:

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Originally Posted by Gabriel Fleseriu

'CString' to 'std::string':

Code:

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

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

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.

Like this -

Code:

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  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);

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