How to handle Korean character set between QT & Oracle - c++

Question

I'd like to use Oracle with ODBC.
I could get data from Oracle successfully. But Korean character is broken like ????.
As all programmer said on internet forum, I tried to apply QTextCodec like below.
I tried EUC-KR and other codec names. But no change.
QTextCodec *codec = QTextCodec::codecForName("UTF-8");
QSqlQuery q("select * from temp", db);
q.setForwardOnly(true);
QString contect= "";
while(q.next())
{
QByteArray name = q.value(0).toByteArray();
QString age = q.value(1).toString();
contect = contect + codec->toUnicode(name);
ui.textEdit->setText(contect);
}
Oracle side info is.....
NLS_CHARACTERSET : KO16MSWIN949
NLS_NCHAR_CHARACTERSET : AL16UTF16
NLS_LANG : KOREAN_KOREA.KO16MSWIN949
I'm developing with eclipse (on windows 7) and the default file text encoding is utf-8.
I'll appreciate it if you give me comment.
Thanks.

Answer 1

I think you need to change the codec name as you need a codec from the Korean character set into UTF8.
Try changing your code to:
QTextCodec *codec = QTextCodec::codecForName("cp949");
As the Wikipedia page for Code page 949 mentions that it is non-standard Microsoft version of EUC-KR, you could also try EUC-KR.
Try the following program to get the list of text codecs and aliases:
test.cpp
#include <QtCore>
int main(int argc, char** argv)
{
QCoreApplication app(argc, argv);
const auto codecs = QTextCodec::availableCodecs();
for (auto it = codecs.begin(); it != codecs.end(); ++it)
{
const auto codec = QTextCodec::codecForName(*it);
qDebug() << codec->name() << codec->aliases();
}
return 0;
}
test.pro
QT += core
SOURCES=test.cpp
QMAKE_CXXFLAGS += -std=c++0x
Note that the program uses auto for brevity, but this requires a C++11 compiler (tested on GCC 4.4).