我以为我在这里回答了你的问题。如果您需要有关如何使用Task
Parallel Library进行操作的更多示例代码，请使用
CancellationTokenSource和
IProgress<T>，这里是：
Action _cancelWork;private async void StartButton_Click(object sender, RoutedEventArgs e){ this.StartButton.IsEnabled = false; this.StopButton.IsEnabled = true; try { var cancellationTokenSource = new CancellationTokenSource(); this._cancelWork = () => { this.StopButton.IsEnabled = false; cancellationTokenSource.Cancel(); }; var limit = 10; var progressReport = new Progress<int>((i) => this.TextBox.Text = (100 * i / (limit-1)).ToString() + "%"); var token = cancellationTokenSource.Token; await Task.Run(() => DoWork(limit, token, progressReport), token); } catch (Exception ex) { MessageBox.Show(ex.Message); } this.StartButton.IsEnabled = true; this.StopButton.IsEnabled = false; this._cancelWork = null;}private void StopButton_Click(object sender, RoutedEventArgs e){ this._cancelWork?.Invoke();}private int DoWork( int limit, CancellationToken token, IProgress<int> progressReport){ var progress = 0; for (int i = 0; i < limit; i++) { progressReport.Report(progress++); Thread.Sleep(2000); // simulate a work item token.ThrowIfCancellationRequested(); } return limit;}
