• 持续性任务代码的一些测试


    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);//这里使用Queue时会出现记录丢失等情况
                        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时会出现缓慢的内存泄漏所以需要使用ThreadPool
                        System.Threading.Timer t = null;
                      using(  t = new System.Threading.Timer((o) => { _DoWork(); }, null, 0, 0);
                                Thread.sleep(10);//需要一定时间以让timer触发
                                防止被直接回收
                       }
                       
                        
                        
    
                    }
                }
            }
    
            public void DoWork()
            {
                Enable = true;
                _DoWork();
            }
        }
    }

    当需要一个任务持续进行时,可以在任务退出时启动一个新的线程(使用ThreadPool),或者启动以个新的定时器

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  • 原文地址:https://www.cnblogs.com/wdfrog/p/3864683.html
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