c# backgroung worker and progress bar

Question

My question is : how to evaluate time taken by a backgroung task in order to calculate pourcent in progress bar ? A file is joined with my code. Thanks for help.

Amit Gupta · Answer

Declare StopWatch variable globally and start if when you start your Background worker and stop it at backgroundWorker1.RunWorkerCompleted. You have to generate the RunWorkerCompleted event, in the mean while write your time taken logic in DoWork event. Good Luck !!

Li Bel · Answer

Thanks for your reply. I've done it but where do place it ? I need to calculate pourcent just before report progress, something like this : pourcent = sw.Elasped * 100/ TempsTotal public bool ExtractAndUpdateOne(string nomTable, out string bilan) { // démarrage du backgroungWorker backgroundWorker1.RunWorkerAsync(t); // affichage dans la progressBar while (backgroundWorker1.IsBusy) { backgroundWorker1.ReportProgress(pourcent); // Keep UI messages moving, so the form remains // responsive during the asynchronous operation. Application.DoEvents(); } } TempsTotal calculation can only appear there : private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e) { // tache à effectuer en background StopWatch sw = new StopWtach(); sw.Start(); ServicesCommuns.extract_update(); sw.Stop(); TempsTotal = sw.Elapsed; }

Amit Gupta · Answer

To calculate the time taken to accomplised the task you can use StopWatch. Have a look to the below link https://stackoverflow.com/questions/2072361/what-is-the-best-way-to-measure-how-long-code-takes-to-execute