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Thread: [SOLVED]Qt 5.7 string encoding issues

  1. #1
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    Default [SOLVED]Qt 5.7 string encoding issues

    Hey mates

    I read a value from database which contains special national characters,say "zażółć gęślą jaźń",and try to display it as a QString.
    In old days Qt4 there were setCodecForCString() and setCodecForTr() whose worked well,sadly these are obsolete in Qt 5.7.

    I've googled for a solution,but either found advices to use the above,obsolete functions,or some like QTextCodec::setCodecForLocale(QTextCodec::codecFor Name("utf-8")),or ensure Qt Creator uses UTF-8 encoding.Unfortunately,nothing worked for me :/

    Therefore I'm asking you for help,how nowadays in Qt 5.7 national characters should be handled properly in an application?
    Last edited by MasterBLB; 4th August 2016 at 12:57.

  2. #2
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    Default Re: Qt 5.7 string encoding issues

    1. Which database ? What code page is used to connect to the database ?
    2. Show some code.

    Codec for CString and codec fo tr have nothing to read data from the database.

  3. #3
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    Default Re: Qt 5.7 string encoding issues

    Qt Code:
    1. Generator::Generator(const QString &databasePath)
    2. {
    3. QString name = databasePath;
    4. name = name.replace("\\","/");
    5. database = QSqlDatabase::addDatabase("QSQLITE");
    6. database.setDatabaseName(name);
    7. if(database.open())
    8. {
    9. Logger::info("Database " + databasePath + " opened successfuly.");
    10. }
    11. else
    12. {
    13. Logger::error("Couldn't open database " + databasePath + "! Error: " + database.lastError().text() + ". Application aborted.");
    14. exit(-2);
    15. }
    16. }
    17.  
    18. Generator::~Generator()
    19. {
    20. if (database.isOpen())
    21. {
    22. database.close();
    23. }
    24. }
    25.  
    26. void Generator::generateDictionaryFile()
    27. {
    28. QSqlQuery query(database);
    29. query.exec("select distinct ulica from AdresyKody_mid_mif");
    30. Logger::info("Last error: " + query.lastError().text());
    31. while(query.next())
    32. {
    33. Logger::info("Got from database: " + query.value(0).toString());//national characters here
    34. }
    35. }
    To copy to clipboard, switch view to plain text mode 

    But the issue is solved already.In other place I had code in Logger
    Qt Code:
    1. logFile.write(logText.toLatin1());
    To copy to clipboard, switch view to plain text mode 
    and as it turned out that was the source of my issues.After change to:
    Qt Code:
    1. logFile.write(logText.toUtf8());
    To copy to clipboard, switch view to plain text mode 
    all works fine.

    Sorry mates for bothering you for nothing.

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