Vous devez exécuter les tâches longues dans un thread séparé afin d'éviter le blocage de l'interface utilisateur. est ici d'une manière que vous pourriez réaliser que:
Définir fil de fond comme ci-dessous:
//Delegate that you could pass into the worker thread
public delegate void ProgressMonitor(string s);
//Call this to start background work
void StartLongRunningWork(ProgressMonitor mon)
{
using (BackgroundWorker bgw = new BackgroundWorker())
{
bgw.DoWork += WorkerThread;
bgw.RunWorkerCompleted += WorkerThreadCompleted;
bgw.RunWorkerAsync(mon);
}
}
void WorkerThread(object sender, DoWorkEventArgs e)
{
ProgressMonitor pm = (ProgressMonitor)e.Argument;
WorkerActual(pm, <any other parameters>);
}
void WorkerActual(ProgressMonitor pm,<any other parameters>)
{
...
pm("Doing x");
Do long running task
pm("Doing y");
...
}
//This function is called in case of Exception, Cancellation or successful completion
//of the background worker. Handle each event appropriately
void WorkerThreadCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Error != null)
{
//Long running task threw an exception
}
else
if (e.Cancelled)
{
//Long running task was cancelled
}
else
{
//Long running task was successfuly completed
}
}
et l'appeler comme ci-dessous:
private void UpDateProgressLabel(string s)
{
this.Dispatcher.BeginInvoke((Action)delegate
{
NotificationLabel.Content = s;
});
}
private void Button_Click(object sender, RoutedEventArgs e)
{
StartLongRunningWork(UpDateProgressLabel);
}