c# - C# 中的线程和 lambda

Question

我有以下代码，每 60 秒向我们的收件人列表发送一批电子邮件。我不确定该怎么做才能到达线程的已完成部分，以便在完成后我可以记录发送了多少电子邮件的最终状态。这在 lambda 风格的线程中是可能的还是我必须做其他事情？谢谢。

(new Thread(()=>
{
    message.To.Clear();

    var emailsToSend = memberlist.Skip(currentCount).Take(takeCount).ToList();

    foreach (var email in emailsToSend)
    {
        message.To.Add(new MailAddress(email.Email));
        //for logging purposes
        campaign.SentTo.Add(new BroadcastEmailCampaignSentTo
        {
            MemberId = email.MemberId,
                Email = email.Email,
                DateSent = DateTime.Now
        });
    }
})).Start(pauseTime);

Answer 1

我会建议使用任务，而不是线程，我快速地把一些东西放在一起来展示这个概念:

        string[] emailsToSend = { "peter@test.com", "paul@test.com", "mary@test.com" };

        List<Task> tasks = new List<Task>();

        foreach (var email in emailsToSend)    {
            var e = email;
            tasks.Add(Task.Factory.StartNew(() => { Console.WriteLine("Sending Email to {0}", e); Thread.Sleep(5000); }));
        }

        Task.Factory.ContinueWhenAll(tasks.ToArray(), (_) => { Console.WriteLine("All Emails sent!"); });

        Console.ReadKey();