UIブロッキングを避けるために、別々のスレッドで実行時間の長いタスクを実行する必要があります。 ここではそれを達成できる一つの方法です:
は、以下のようにバックグラウンドスレッドを定義します。
//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
}
}
し、以下のようにそれを呼び出す:
private void UpDateProgressLabel(string s)
{
this.Dispatcher.BeginInvoke((Action)delegate
{
NotificationLabel.Content = s;
});
}
private void Button_Click(object sender, RoutedEventArgs e)
{
StartLongRunningWork(UpDateProgressLabel);
}
は、