a while循环线程

Question

所以我一直在尝试创建一些代码，以在wire循环中发送数据，特别是通过udpclient向服务器发送的数据包。

 static void doSend(string ip, int port)
    {
        while (isSending)
        {
            _sockMain = new UdpClient(ip, port);
            // Code for datagram here, took it out
            _sockMain.Send(arr_bData, arr_bData.Length);
        }
    }

但是，当我称之为"停止"方法时，它会陷入恒定循环中，并且不会出现。我该如何将WARY循环放入线程中？因此，我可以停止停止线程，取消循环？

Answer 1

它挂起，因为您的dosend方法在UI线程上工作。您可以使用以下类之类的东西使其在单独的线程上运行，也可以使用BackgroundWorkerclass

public class DataSender
    {
        public DataSender(string ip, int port)
        {
            IP = ip;
            Port = port;
        }
        private string IP;
        private int Port;
        System.Threading.Thread sender;
        private bool issending = false;
        public void StartSending()
        {
            if (issending)
            {
                // it is already started sending. throw an exception or do something.
            }
            issending = true;
            sender = new System.Threading.Thread(SendData);
            sender.IsBackground = true;
            sender.Start();
        }
        public void StopSending()
        {
            issending = false;
            if (sender.Join(200) == false)
            {
                sender.Abort();
            }
            sender = null;
        }
        private void SendData()
        {
            System.Net.Sockets.UdpClient _sockMain = new System.Net.Sockets.UdpClient(IP, Port);
            while (issending)
            {
                // Define and assign arr_bData somewhere in class
                _sockMain.Send(arr_bData, arr_bData.Length);
            }
        }
    }

Answer 2

您可以使用背景工作人员线程http://www.dotnetperls.com/backgroundworker并内部（）将您的时循环放置。您可以使用cancelAsync（）停止代码，并设置backgroundWorker1.WorkerSupportsCancellation == true

BackgroundWorker bw = new BackgroundWorker();
          if (bw.IsBusy != true)
          {
              bw.RunWorkerAsync();
          }
          private void bw_DoWork(object sender, DoWorkEventArgs e)
          {
              // Run your while loop here and return result.
              result = // your time consuming function (while loop)
          }
          // when you click on some cancel button  
           bw.CancelAsync();

Answer 3

static bool _isSending;
static void doSend(string ip, int port)
{
    _isSending = true;
    while (_isSending)
    {
        _sockMain = new UdpClient(ip, port);
        // ...
        _sockMain.Send(arr_bData, arr_bData.Length);
    }
}
static void Stop()
{
    // set flag for exiting loop here
    _isSending = false;    
}

还考虑在pascalcase中命名您的方法，即DoSend（甚至StartSending都会更好），StopSending。

Answer 4

使用BREAK语句？