How to save the image blob data into the database??

[Gokulnathvc]

I am using the following code:
I am reading the jpeg image in Qbytearray; But while saving to database, the image size is doubled and while retrieving from database, the file is being corrupted. How to read the image properly??

QByteArray buf=NULL;
            originalPixmap =QPixmap();
            originalPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());
            QString strfname;
            strfname.sprintf("%d",c);
            originalPixmap.save("C:\\Program Files\\image"+strfname+".jpeg","jpeg");            
            c++;
            char Data;
            QFile file("C:\\Program Files\\image"+strfname+".jpeg");
            file.open(QIODevice::ReadOnly);
            int len=file.size();
            //buf=file.read(len);
            buf=file.readAll();            
            file.close();
            file.remove();            
            QSqlQuery query;
            query.exec("INSERT INTO log (grab_date, ip_address, image,logged_user) "
                          "VALUES (?,?,?,?)");
            query.bindValue(0,dd);
            query.bindValue(1,address);
            query.bindValue(2,buf.toBase64());
            query.bindValue (3,hostname);
            bool qry=query.exec();

QByteArray buf=NULL;
            originalPixmap =QPixmap();
            originalPixmap = QPixmap::grabWindow(QApplication::desktop()->winId());
            QString strfname;
            strfname.sprintf("%d",c);
            originalPixmap.save("C:\\Program Files\\image"+strfname+".jpeg","jpeg");            
            c++;
            char Data;
            QFile file("C:\\Program Files\\image"+strfname+".jpeg");
            file.open(QIODevice::ReadOnly);
            int len=file.size();
            //buf=file.read(len);
            buf=file.readAll();            
            file.close();
            file.remove();            
            QSqlQuery query;
            query.exec("INSERT INTO log (grab_date, ip_address, image,logged_user) "
                          "VALUES (?,?,?,?)");
            query.bindValue(0,dd);
            query.bindValue(1,address);
            query.bindValue(2,buf.toBase64());
            query.bindValue (3,hostname);
            bool qry=query.exec();

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