问需要可观察到的计时器将消息传递给UI线程。

EN

Jobs.Current.ShowProgress(_ =>
    {
        if (Jobs.Current.Duration == 0 && this.progressBarMarkJob.Value >= this.progressBarMarkJob.Maximum - this.progressBarMarkJob.Step / 2)
        {
            this.progressBarMarkJob.Step /= 2;
        }
        this.progressBarMarkJob.PerformStep();
    }, () =>
    {
        stopwatch.Stop();
        var elapsed = string.Format(stopwatch.Elapsed.TotalHours >= 1 ? @"{0:hh\:mm\:SS}" : @"{0:mm\:SS}", stopwatch.Elapsed);
        this.labelMarkTime.Text = string.Format("Elapsed{0:8}", elapsed);
        this.labelMarkTime.Visible = true;
        Jobs.Current.Duration = (uint)stopwatch.Elapsed.TotalSeconds;
        this.progressBarMarkJob.Value = this.progressBarMarkJob.Maximum;
    });

public void ShowProgress(Action<long> notify, Action terminate)
{
    this.Progress = Observable.Timer(ProgressInterval, ProgressInterval).Finally(terminate).Subscribe(notify);
}