progress bar not working with backgroundworker

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C#

bar

BackgroundWorker

Hi guys,

I have a server-client system going on with client commands controlling the server form.

The commands are connect, disconnect, send and receive.

When client wants to send data to/receive data from server (command == send/receive), there will be a progress bar (marquee style) shown on the same server form and hide when sending/receiving is done. The progress bar works until i start to invoke server commands (freeze).

The problem is that the server commands are (and must be) executed by server in the main thread.

So even if i run the command in a backgroundworker, it doesn’t help since the actual server commands are invoked on the main thread – the same thread that shows the progress bar.

Any ideas?

    private SynchronizationContext context = SynchronizationContext.Current ?? new SynchronizationContext();
private Thread _serverThread = null;

public bool startServer()
    {

        if (_serverThread != null)
        {
            return false;
        }

        Server _Server = null;
        _Server = new Server();
        _Server.callback += new EventHandler(server_callback);

        return true;
    }


    void server_callback(object sender, EventArgs e)
    {
        ServerEventArgs types = e as ServerEventArgs;
        if (types != null)
        {
            context.Send(new SendOrPostCallback(processCommand), e);
        }

    }


    public void processCommand(Object o)
    {
        ServerEventArgs args = o as ServerEventArgs;
        if (args != null)
        {
            string input = args.command;
            string status = _revitWorker.ProcessCommand(app, input, true);

            statusUpdate(status);

            string output = _revitWorker.ProcessCommand(app, input, false);
            args.response = output;
        }
    }


    //update status
    private void statusUpdate(string status)
    {
        if (status == "disconnect")
        {
            disconnectFlag();
        }
        else if (status == "loading")
        {
            ProcessingFlag();
        }
        else
        {
            connectFlag();
        }
    }


    //disconnect
    public void disconnectFlag()
    {
        label1.Text = "disconnect";
        progressBar1.Visible = false;
    }


    //processing
    public void processingFlag()
    {
        label1.Text = "processing";
        progressBar1.Visible = true;    //progress bar appear only when loading
    }


    //connect
    public void connectFlag()
    {
        label1.Text = "ready";
        progressBar1.Visible = false;
    }