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Thread: How can I read an xml utf-16 file with QXmlStreamReader?

  1. #1
    Join Date
    Jan 2012
    Qt products
    Unix/X11 Windows

    Default How can I read an xml utf-16 file with QXmlStreamReader?

    I try to find a way to read an xml file that has utf-16 encoding, apparently QIODevice can’t read utf-16 xml files, it says it’s invalid file.
    After searching the internet and the t assistant I found that the only library that can set a codec in a file is QTextStream.
    Then I found this: QTextCodec.
    After searching a bit more on the internet I understood that I need to create an encoding function by myself that should look like this:

    QByteArray myEncoderFunc( const QString &xmlfileNameSt );

    And call this function like this:

    xmlFile.setEncodingFunction ( myEncoderFunc ) ;

    With all this information I don’t really know how do I make my file readable for QXmlStreamReader.

    Can you help in this?


  2. #2
    Join Date
    Mar 2009
    Brisbane, Australia
    Thanked 1,610 Times in 1,537 Posts
    Qt products
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    Wiki edits

    Default Re: How can I read an xml utf-16 file with QXmlStreamReader?

    A file is just a stream of bytes to a QIODevice.

    This code:
    Qt Code:
    1. #include <QtCore>
    2. #include <QDebug>
    4. int main(int argc, char **argv)
    5. {
    6. QCoreApplication app(argc, argv);
    8. QFile in("utf16test.xml");
    10. QXmlStreamReader xml(&in);
    11. while (!xml.atEnd()) {
    12. xml.readNextStartElement();
    13. qDebug() <<;
    14. }
    15. if (xml.hasError()) {
    16. // do error handling
    17. }
    19. return 0;
    20. }
    To copy to clipboard, switch view to plain text mode 
    handles UTF16 encoded XML files just fine here. The reader code includes detection of UTF 16 or 32, BE or LE, with or without BOM, and falls back to UTF-8 based on the first four bytes of the XML file.

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