Solved

Converting TCHAR to simple string

Posted on 2004-09-20
10
1,418 Views
Last Modified: 2013-12-14
Hi,

How do I convert a TCHAR string to a simple string?

I'm trying to do a comparision with some std::string functions, but i keep getting an error during compilation which says that could not convert TCHAR string to simple string or something...

Regards,
Kelvin
0
Comment
Question by:wiredx
  • 5
  • 4
10 Comments
 
LVL 48

Accepted Solution

by:
AlexFM earned 125 total points
ID: 12101959
#include <atlbase.h>


void PrintTCHAR(TCHAR* s)
{
    USES_CONVERSION;

    printf(T2CA(s));            // T2CA converts TCHAR* to const char*
}

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_atl_String_Conversion_Macros.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/_atl_string_conversion_macros.asp
0
 
LVL 7

Expert Comment

by:jimwasson
ID: 12101961
A TCHAR will resolve to whatever the project is built as -- either MBCS or unicode.
"std::string str" will use ascii chars. You might try using a wide string:
    std::wstring str;
0
 

Author Comment

by:wiredx
ID: 12102015
AlexFM: sorry for the newbie question.. so how do i use that code on top.. to say convert  a TCHAR called "blah"?
0
Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

 
LVL 48

Expert Comment

by:AlexFM
ID: 12102057
#include <atlbase.h>

USES_CONVERSION;

TCHAR* s = _T("blah");    

if ( strcmp(T2CA(s), "blah") == 0 )    // strcmp requires const char*
    ...
0
 

Author Comment

by:wiredx
ID: 12110499
hmm.. strange. i still get this error:

error C2664: 'strcmp' : cannot convert parameter 2 from 'class tcharcls' to 'const char *'
        No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
0
 
LVL 48

Expert Comment

by:AlexFM
ID: 12110773
Something wrong with second parameter. Please show your code.
0
 

Author Comment

by:wiredx
ID: 12110873
AlexFM:

i think the code is too much to post here... i zipped it up at http://blog.com.sg/code.zip
the stuff is in src.cpp, and what im trying to do is to convert the "btemp" and "temp" values from there so that i could manipulate some strings as shown as in.. http://www.devx.com/getHelpOn/10MinuteSolution/16972/0/page/3

sorry for the trouble AlexFM, but im really new and struggling with c++ :(
0
 
LVL 48

Expert Comment

by:AlexFM
ID: 12111018
2.27 MB is too much for download. Can you post some code fragment or give zip file of acceptable size?
0
 

Author Comment

by:wiredx
ID: 12111039
oops. sorry, forgot to Clean the temp files.
its now 28.4 KB... --> http://blog.com.sg/code2.zip
0
 
LVL 48

Expert Comment

by:AlexFM
ID: 12111265
This is not UNICODE-ANSI strings problem. Your project is not UNICODE, all strings are ANSI strings. TCHAR is char. class tcharcls in your project is char* wrapper. I don't know why do you use this class instead of std::string, but this is your choice.
The problem is that class tcharcls doesn't have TCHAR* casting operator, this is a reason why some lines of your code are not compiled.
You don't need all string conversion stuff from my first post. Make the following change in your code:

TCHAR* s = btemp.getValue();

if ( strcmp(s, btemp.getValue()) == 0 )
{
    cout << s << endl;
}

If class tcharcls doesn't know to convert itself to TCHAR*, use it's getValue function when you need to get TCHAR* pointer from tcharcls instance.
0

Featured Post

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Update (December 2011): Since this article was published, the things have changed for good for Android native developers. The Sequoyah Project (http://www.eclipse.org/sequoyah/) automates most of the tasks discussed in this article. You can even fin…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
THe viewer will learn how to use NetBeans IDE 8.0 for Windows to perform CRUD operations on a MySql database.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

785 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question