[Qt-interest] how to write data into file

[Atlant Schmidt]

Vincent:

  The code you included is taking integers in three different sizes
  (1 byte, 2 byte, and 4 byte), formatting them for printout as
  hexadecimal numbers and concatenating them into a single
  QString, and then writing that complete QString (containing the
  three numbers) to a file.

  Perhaps you're really looking for QDataStream?

    http://doc.qt.nokia.com/latest/qdatastream.html

  *THAT* class can write binary data to a file.

                                         Atlant


From: qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com [mailto:qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com] On Behalf Of Vincent Cai
Sent: Tuesday, October 11, 2011 08:36
To: Qt-interest
Subject: [Qt-interest] how to write data into file

Dear all,

         I try to write some different type of data into a file, but failed.
         From below code, what I hope to get in file is: 01 00 02 00 00 00 03
         But what I exactly get is: 123
         Could anybody tell me how to modify below code?

    QFile TSAFile;
    QString tmp;
    const QChar *data;
    quint8 a = 0x01;
    quint16 b = 0x02;
    quint32 c = 0x03;
    tmp += QString::number(a, 16);
    tmp += QString::number(b, 16);
    tmp += QString::number(c, 16);
    data = tmp.constData();
    while (!data->isNull())
    {
        TSAFile.write((char*)data);
        ++data;
    }
    TSAFile.setFileName("C:\\QtDebug.bin");
    TSAFile.close();

Thanks,
Vincent.

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