Hello.

I'mt rying to tun a process in the back gorund using the background worker, but when the thread is comlpete it does not run the "RunWorkerCompleted" function do i need to call/invoke it somehow or should it run when the thread is complete?

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
        
            BackgroundWorker bw = new BackgroundWorker();

            int arg = (int)e.Argument;

            e.Result = Engine(bw, arg, e);

            if (bw.CancellationPending)
            {
                e.Cancel = true;
            }
        }

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            if (e.Cancelled)
            {
                MessageBox.Show("Operation was canceled");
            }
            else if (e.Error != null)
            {
                string msg = string.Format("An error occurred: {0}", e.Error.Message);
                MessageBox.Show(msg);
            }
            else
            {
                string msg = string.Format("Result = {0}", e.Result);
            }
        }


in addition if i try to call the progressChanged event the progress bar will not update, what em i doing wrong?

THANKS!!

Why are you creating a new BackgroundWorker in the DoWork event?

Try:

BackgroundWorker bw = (BackgroundWorker)sender;

/- Sam Judson : Wrox Technical Editor -/

I have changed that line of code and i get no update in the behavior of the app any more ideas?

a) What is in your ProcessChanged event?

b) the line "string msg = string.Format("Result = {0}", e.Result);" doesn't display anything - have you tried setting a break point on this line to make sure it is getting to this line.

/- Sam Judson : Wrox Technical Editor -/

I set a break point in the function running in the background, whent he function is complete the application does not run the backgroundWorker1_RunWorkerCompleted function. it never gets there.

Then I suspect that an exception is occurring in your code. Try putting a try/catch around the call to the Engine method.

/- Sam Judson : Wrox Technical Editor -/