C#控制台 终止多个线程

Question

我在控制台版的link tester上工作.我在多个线程上启动功能，但我不能通过按键取消它们.有什么办法可以做到这一点？

try
{
    Thread[] tr = new Thread[Variables.Threads];
    int i = 0;
    while (i < Variables.Threads && Variables.running)
    {
        tr[i] = new Thread(new ThreadStart(Program.Runner));
        i++;
    }
    //Start each thread  
    foreach (Thread x in tr)
    {
        x.Start();
    }
    //Console.ReadKey();  

    Task.Factory.StartNew(() =>
    {
        while (Colorful.Console.ReadKey().Key != ConsoleKey.Escape);
        Variables.running = false;
        foreach (Thread x in tr)
        {
            x.Abort();
        }
        Program.Menu();
    });

}
catch (Exception)
{
}

EDIT : 当我的线程快结束时，我所有的应用程序在我的线程结束后不移动。

Answer 1

控制台不是一个开始学习多任务的好环境，更不是多线程。我对学习多任务--尤其是多线程的建议是WindowsForms应用程序中的BackgroundWorker。事件队列主要做的是让你的应用程序保持活力，而不会阻塞IO。虽然BackgroundWorker已经过时了，应该从生产代码中删除，但它是很好的训练轮。

另外你目前的代码也在吞噬异常。包括致命的. 这是最主要的罪过 异常处理. 不要这样做。

最后，你只能在不同的代码行之间进行取消检查和进度报告。在这个BGW的例子中，我有一个优势，那就是无论如何我都要写下所有的循环--所以深层的取消检查和进度报告是在卡上的。但是如果你使用 "别人的代码"，你很有可能要等一个函数调用返回后才能进行报告和检查。

#region Primenumbers
private void btnPrimStart_Click(object sender, EventArgs e)
{
    if (!bgwPrim.IsBusy)
    {
        //Prepare ProgressBar and Textbox
        int temp = (int)nudPrim.Value;
        pgbPrim.Maximum = temp;
        tbPrim.Text = "";

        //Start processing
        bgwPrim.RunWorkerAsync(temp);
    }
}

private void btnPrimCancel_Click(object sender, EventArgs e)
{
    if (bgwPrim.IsBusy)
    {
        bgwPrim.CancelAsync();
    }
}

private void bgwPrim_DoWork(object sender, DoWorkEventArgs e)
{
    int highestToCheck = (int)e.Argument;
    //Get a reference to the BackgroundWorker running this code
    //for Progress Updates and Cancelation checking
    BackgroundWorker thisWorker = (BackgroundWorker)sender;

    //Create the list that stores the results and is returned by DoWork
    List<int> Primes = new List<int>();


    //Check all uneven numbers between 1 and whatever the user choose as upper limit
    for(int PrimeCandidate=1; PrimeCandidate < highestToCheck; PrimeCandidate+=2)
    {
        //Report progress
        thisWorker.ReportProgress(PrimeCandidate);
        bool isNoPrime = false;

        //Check if the Cancelation was requested during the last loop
        if (thisWorker.CancellationPending)
        {
            //Tell the Backgroundworker you are canceling and exit the for-loop
            e.Cancel = true;
            break;
        }

        //Determin if this is a Prime Number
        for (int j = 3; j < PrimeCandidate && !isNoPrime; j += 2)
        {
            if (PrimeCandidate % j == 0)
                isNoPrime = true;
        }

        if (!isNoPrime)
            Primes.Add(PrimeCandidate);
    }

    //Tell the progress bar you are finished
    thisWorker.ReportProgress(highestToCheck);

    //Save Return Value
    e.Result = Primes.ToArray();
}

private void bgwPrim_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    pgbPrim.Value = e.ProgressPercentage;
}

private void bgwPrim_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    pgbPrim.Value = pgbPrim.Maximum;
    this.Refresh();

    if (!e.Cancelled && e.Error == null)
    {
        //Show the Result
        int[] Primes = (int[])e.Result;

        StringBuilder sbOutput = new StringBuilder();

        foreach (int Prim in Primes)
        {
            sbOutput.Append(Prim.ToString() + Environment.NewLine);
        }

        tbPrim.Text = sbOutput.ToString();
    }
    else 
    {
        tbPrim.Text = "Operation canceled by user or Exception";
    }
}
#endregion

然而在你的情况下，Multi线程 显得不伦不类。多任务化 没有线程可能会更好。线程只有在你有一个 绑定CPU 任务。而 "检查链接 "听起来像是一个 网络绑定 任务。线程有一些额外的头痛，你最好避免。