const QByteArray-->QString
const QByteArray bytes;
QString param = QString::fromAscii( bytes.data(), bytes.size() );
const char* --> const QByteArray
const char* data;
const QByteArray buf;
buf->append( data, sizeof(data) );
const QByteArray-->QString
const QByteArray bytes;
QString param = QString::fromAscii( bytes.data(), bytes.size() );
const char* --> const QByteArray
const char* data;
const QByteArray buf;
buf->append( data, sizeof(data) );