持久性任務代碼的一些測試

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using System;using System.Collections.Generic;using System.Collections.Concurrent;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Threading;namespace CallTest{    public partial class Form1 : Form    {        private ConcurrentQueue<String> _Queue = new ConcurrentQueue<string>();        public Form1()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)        {            //var c = new CallT();            //c.DoWork();            Thread t1=new Thread(()=>{OutQueue();});            t1.IsBackground = true;            t1.Start();            var arr = new List<Thread>();            for (int i = 0; i < 50; i++)            {                arr.Add( new Thread(() => { EnQueue(); }));                            }            arr.ForEach((ent) => ent.Start());        }        private void EnQueue()        {            for (int i = 0; i < 1000; i++)            {                                string msg = string.Format("Id:{0},Index:{1}",Thread.CurrentThread.ManagedThreadId,i);                _Queue.Enqueue(msg);                Thread.Sleep(10);            }        }        private void OutQueue()        {            int i = 0;            while (true)            {                if (_Queue.Count > 0)                {                    i++;                    string msg = null;                    //Console.WriteLine(_Queue.Dequeue(); + " Count:" + i);//這裡使用Queue時會出現記錄丟失等情況                    if (_Queue.TryDequeue(out msg))                    {                        Console.WriteLine(msg + " Count:" + i);                    }                }               // Thread.Sleep(10);            }        }    }    public class CallT    {        private bool Enable { get; set; }        public CallT()        {            Enable = false;        }        private void _DoWork()        {            try            {                Thread.Sleep(100);                Console.WriteLine("TId:" + Thread.CurrentThread.ManagedThreadId);                            }            catch (Exception ex)            {                                           }            finally            {                                                            if (Enable)                {                    //ThreadPool.QueueUserWorkItem((o) => {                    //    _DoWork();                    //});                    //使用Thead時會出現緩慢的記憶體流失所以需要使用ThreadPool                    System.Threading.Timer t = null;                  using(  t = new System.Threading.Timer((o) => { _DoWork(); }, null, 0, 0);                            Thread.sleep(10);//需要一定時間以讓timer觸發                            防止被直接回收                   }                                                                           }            }        }        public void DoWork()        {            Enable = true;            _DoWork();        }    }}

當需要一個任務持續進行時，可以在任務退出時啟動一個新的線程（使用ThreadPool），或者啟動以個新的定時器