Read and Write file to/from QFile

[ruben.rodrigues]

Hi all!

I need help in a small function to get a file back from a QFile that is in a QByteArray.

//----------Read File----------//
 
QFile file(ui.lineEdit->text()); // /home/user/fileIN.txt
if(!file.open(QIODevice::ReadOnly))
	qDebug()<<"Error opening the file";
 
QByteArray qba;
 
QDataStream dataStream(&qba, QIODevice::WriteOnly);
dataStream << file.readAll();
 
 
//---------Write File----------//
 
QByteArray outFile;
 
QDataStream dataStream2(&qba, QIODevice::ReadOnly);
dataStream2 >> outFile;
 
QFile out(ui.lineEdit_2->text()); // /home/user/fileOut.txt
if(!file.open(QIODevice::WriteOnly))
	qDebug()<<"Error opening the file";
 
out.write(outFile);

//----------Read File----------//

QFile file(ui.lineEdit->text()); // /home/user/fileIN.txt
if(!file.open(QIODevice::ReadOnly))
	qDebug()<<"Error opening the file";

QByteArray qba;

QDataStream dataStream(&qba, QIODevice::WriteOnly);
dataStream << file.readAll();


//---------Write File----------//

QByteArray outFile;

QDataStream dataStream2(&qba, QIODevice::ReadOnly);
dataStream2 >> outFile;

QFile out(ui.lineEdit_2->text()); // /home/user/fileOut.txt
if(!file.open(QIODevice::WriteOnly))
	qDebug()<<"Error opening the file";

out.write(outFile);

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I have no clue how to get the from a qbytearray and write it to my disk. At the moment it does nothing...
I need this because a co-worker of mine that doesn't work with me anymore wrote a function that save files to a database in form a a BLOB and now I don't know how to get them back.

Thank you!

---

Added after 5 minutes:

Problem solved...I am so silly that I open the QFile file twice instead of the out...

thanks anyway

[wysota]

Why are you using QDataStream?