Question

I have a form which when loaded starts a looping background worker which gets data from a usb device every half a second.
Once the program receives a new piece of data from the usb device it runs a function.
The _Dowork function has

while (true)
{
    portConnection.Write("?");
    Thread.Sleep(50);
}

I then have a separate routine that runs when data is received

private void portConnection_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
}

This is the routine that cannot then set values on the original form as the function is apparently on a separate thread.
How can I make this routine able to influence the original form?

Answer 1

Try something like this:

private void InvokeIfRequired(Control target, Delegate methodToInvoke)
{
    if (target.InvokeRequired)
        target.Invoke(methodToInvoke);
    else
        methodToInvoke.DynamicInvoke();
}

Call the method in your ProcessStatsReceived and in the methodToInvoke do your stuff…

You can use it like this in the ProccessStatusReceived:

InvokeIfRequired(this, new MethodInvoker(delegate() { this.lblStatus.Text = (string)e.Data; }));