problem in writing text with QFile

[wysota]

1. Seeking in a socket device doesn't make sense as it is not a random access device.
2. If you use QDataStream, you don't need to send the size of QByteArray as QDataStream will do that for you. Remember that this is a serialization mechanism, not a simple binary stream.
3. connectToHost() is an asynchronous call - you have to wait for the connection to be established before sending/receiving any data. The same goes for disconnectFromHost (I think you meant that and not disconnect(), right?).

[wei243]

thx wysota.

QTextStream slove my 1st problem in writing text to a file.

QFile file(filename);
file.open(QIODevice::WriteOnly);
QTextStream textstream(&file);
textstream << text;

i apply it in writing a picture file with QDataStream.
but nothing appear in the picture file.
wat should i do?

[wysota]

i apply it in writing a picture file with QDataStream.
but nothing appear in the picture file.
wat should i do?

You can't use a text stream to handle binary data... I suggest you don't use streams at all with binaries or use QDataStream::readRawData and QDataStream::writeRawData instead of << and >> operators.