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POException when update a progressbar in a Background Worker
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  1. POException when update a progressbar in a Background Worker
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    copied!<p>I created a wpf application. In my application, i open a windows and i copy in background some files. I would like to display and update a progressbar during thos copy.</p> <p>I tried to use a BackgroundWorker :</p> <pre><code>public partial class FenetreProgressBar : Window { private readonly BackgroundWorker worker = new BackgroundWorker(); public FenetreProgressBar(ObservableCollection&lt;Evenement.FichierJoint&gt; CollectionFicJointsToAdd) { InitializeComponent(); worker.WorkerReportsProgress = true; worker.DoWork += worker_DoWork; worker.RunWorkerCompleted += worker_RunWorkerCompleted; worker.ProgressChanged +=worker_ProgressChanged; worker.RunWorkerAsync(CollectionFicJointsToAdd); } private void ProgressChanged(double Persentage, ref bool Cancel) { if (Cancel) this.Close(); worker.ReportProgress((int)Persentage); } private void Completedelegate() { this.Close(); } private void worker_DoWork(object sender, DoWorkEventArgs e) { ObservableCollection&lt;Evenement.FichierJoint&gt; collection = e.Argument as ObservableCollection&lt;Evenement.FichierJoint&gt;; //2) On ajoute les fichiers joints à l'évènements ( ce qui va donc les copier dans le répertoire paramétré) foreach (Evenement.FichierJoint FichierJoint in collection) { if (FichierJoint.strPathFichier.Length &gt; 0) { Evenement.FichierJoint monFichierJoint = new Evenement.FichierJoint(FichierJoint.strPathFichier, App.obj_myEvenement.strEvtNumeroString); MaProgressBar.Minimum = 0; MaProgressBar.Maximum = 100; monFichierJoint.copyObject.OnProgressChanged += ProgressChanged; monFichierJoint.copyObject.OnComplete += Completedelegate; monFichierJoint.AddFichierJoint(); } } } private void worker_RunWorkerCompleted(object sender,RunWorkerCompletedEventArgs e) { // Traitement terminé, on ferme la fenetre this.Close(); } private void worker_ProgressChanged(object sender, ProgressChangedEventArgs e) { MaProgressBar.Value = e.ProgressPercentage; } } </code></pre> <p>When the programme go here :</p> <pre><code>MaProgressBar.Minimum = 0; MaProgressBar.Maximum = 100; </code></pre> <p>I have an exception : " The calling thread cannot access this object because a different thread owns it".</p> <p>I have read severals answer on google and stackoverflow but i don't try to use this approach with the BackgroundWorker.</p> <p>Anyone coule help me in order to avoid this exception and solve the problem please ?</p> <p>Thanks a lot,</p> <p>Best regards :)</p>
 

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