[Kde-bindings] C#, Qyoto, Qt - How to read output from QProcess?

Richard Dale rdale at foton.es
Fri Feb 19 10:06:39 UTC 2010

On Friday 19 February 2010 06:02:47 am linuxoidoz at yahoo.com.au wrote:
> All I've done was to move
> proc = new QProcess(this);
> from the MainWindow class constructor to the slot and it's working now,
> that is on readyReadStandardOutput(), it writes my text into a QTextEdit
> box. But how can I output the process output into the QTextEdit? This:
>                [Q_SLOT]
>                private void updateLog() {
>                        QByteArray data = proc.ReadAllStandardOutput();
>                        QTextCodec codec = QTextCodec.CodecForUtfText(data);
>                        string str = codec.ToUnicode(data);
>                        txtEdit.Append(str);
>                }
> only crashes the app with "System.MemberAccessException: Cannot create an
> instance of Qyoto.QTextCodec because it is an abstract class". I used the
> Qt C++ example and modified it to C#. There are many examples which show
> you can cast byte array type to string with QString(byteArray), but
> there's no QString in Qyoto, and (String)byteArray complains it can't
> convert QBytaArray to string. I'd appreciate your help. Thank you.
We've added a QByteArray.ToArray() method to convert it to a byte[], which you 
can then convert to a string with something like 

-- Richard

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