How to convert std:string to CString in unicode project

c++ string visual-studio mfc
Walter Fabio Simoni picture Walter Fabio Simoni · Oct 27, 2013 · Viewed 61.6k times · Source

I have a std::string. I need to convert this std:string to a Cstring.

I try to use the .c_str() but it's only for non-unicode project and i use unicode project ( because non unicode project are depreceated wiht VS2013).

Anyone could show my how to convert an std::string to a CString in unicode project ?

Answer

IInspectable picture IInspectable · Oct 27, 2013

CString has a conversion constructor taking a const char* (CStringT::CStringT). Converting a std::string to a CString is as simple as:

std::string stdstr("foo");
CString cstr(stdstr.c_str());

This works for both UNICODE and MBCS projects. If your std::string contains embedded NUL characters you have to use a conversion constructor with a length argument:

std::string stdstr("foo");
stdstr += '\0';
stdstr += "bar";
CString cstr(stdstr.c_str(), stdstr.length());

Note that the conversion constructors implicitly use the ANSI code page of the current thread (CP_THREAD_ACP) to convert between ANSI and UTF-16 encoding. If you cannot (or do not want to) change the thread's ANSI code page, but still need to specify an explicit code page to use for the conversion, you have to use another solution (e.g. the ATL and MFC String Conversion Macros).

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