C# -从线程更新windows窗体元素

private void UpdateLabelFromThread()
{
    Thread thread = new Thread(new ThreadStart(WorkThreadFunction));
    thread.Start();
}

private void WorkThreadFunction()
{
    // 模拟长时间运行的任务
    Thread.Sleep(2000);

    // 使用Invoke在UI线程上更新Label
    label1.Invoke((MethodInvoker)delegate
    {
        label1.Text = "任务完成!";
    });
}

private void UpdateLabelWithBackgroundWorker()
{
    BackgroundWorker worker = new BackgroundWorker();
    worker.DoWork += Worker_DoWork;
    worker.RunWorkerCompleted += Worker_RunWorkerCompleted;
    worker.RunWorkerAsync();
}

private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
    // 模拟长时间运行的任务
    Thread.Sleep(2000);
}

private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    // 在UI线程上更新Label
    label1.Text = "任务完成!";
}