error in CString to const std::string conversion.

Le rner

Hi all, i have an problem to convert a CString value in const std::string.

CString result="";
CString str="test";

const std::string s = str;//here gives an error

/*
error C2440: 'initializing' : cannot convert from 'CString' to 'std::basic_string<_Elem,_Traits,_Ax>'
*/

std::string s1 = fun1(s);

result=s1.c\_str();

please help me for this. thanks in advance.

ShilpiP

How to: Convert Between Various String Types ->[^]

"Every Little Smile can touch Somebody's Heart... May we find Hundreds of Reasons to Smile Everyday... and May WE be the Reason for someone else to smile always!" (ICAN) "Your thoughts are the architects of your destiny."

Le rner

thanks

Rajesh R Subramanian

Are you building for Unicode or MBCS? I think you're building for Unicode, but are using the ANSI version of std string. Try the following:

//Unicode build
CString sz = L"Hello";
const std::wstring str = sz;

//MBCS build
CStringA sz = "Hello";
const std::string str = sz;

"Real men drive manual transmission" - Rajesh.

Le rner

thanks but now one more error is generated

'fun1' : cannot convert parameter 1 from 'const std::wstring' to 'const std::string &'

and fun1 is like this

std::string fun1 (std::string const& s);

Lost User

You need to be consistent in your class selections, use all unicode or all MBCS. If you are using Unicode then you need to use the std::wstring class rather than string.

The best things in life are not things.

PJ Arends

Or use std::tstring[^] and not have to worry about it at all.

Independent ACN representative

-- Check out the possibilities for your future!

-- Financial independance

-- Full time or Part time

-- In more than 20 countries through North America, Europe, Asia and the Pacific

Within you lies the power for good - Use it!

Lost User

PJ Arends wrote:

Or use std::tstring[^] and not have to worry about it at all.

A simple typedef, something like

#if defined(UNICODE)
typedef std::wstring STRING
#else
typedef std::string STRING
#endif

would also do it, since both are implementations of basic_string and its functions.

The best things in life are not things.

pratik_mishra35

Include the "atlconv.h". Then use one of the macros defined in this article http://msdn.microsoft.com/en-us/library/87zae4a3%28v=vs.80%29.aspx[^]