多线程实现Demo
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Threading; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using Utility.Web; namespace SasSystem { public partial class AsyncThreadDemo : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { } } protected void btnStart_Click(object sender, EventArgs e) { Thread thread = new Thread(delegate() { AppendText(200); });//匿名委托，实现带参数线程 thread.IsBackground = true; thread.Start(); } public void AppendText(int c) { for (int i = 0; i < c; i++) { File.AppendAllText(Server.MapPath("~/upload/paper-calculate-log.txt"), DateTime.Now + ": 异步进程执行中：" + i + Environment.NewLine); Thread.Sleep(100); } } } }开始执行后，关闭页面，后台依然会执行，执行完毕后，自动关闭线程参考资源：
最近想在使用.net 的队列处理一些耗时的工作。经过考虑，需要先设计一个类，类中包含一个静态的队列。主要是写队列和读取队列。
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading; namespace Utility.Web { public class AsyncThreadHelper { // 用于存放需要计算总分的试卷的计算任务的队列 private static Queue<string> _paperQueue; // 用于通知是否有新试卷需要处理的“信号器” private static ManualResetEvent _hasNew; // 用于写日志的线程 private static Thread _loggingThread; static AsyncThreadHelper() { _paperQueue = new Queue<string>(); _hasNew = new ManualResetEvent(false); _loggingThread = new Thread(Process); _loggingThread.IsBackground = true; _loggingThread.Start(); } // 处理队列中的任务 private static void Process() { while (true) { // 等待接收信号，阻塞线程。 _hasNew.WaitOne(); // 接收到信号后，重置“信号器”，信号关闭。 _hasNew.Reset(); AsyncThread(); } } private static void AsyncThread() { var i = 0; while (_paperQueue.Count <= 0) { File.AppendAllText("E:/CrazyGame/SasSystem/SasSystem/upload/paper-calculate-log.txt", DateTime.Now + ": 空循环-" + i + Environment.NewLine); _hasNew.Reset(); Thread.Sleep(200); } string paperGuid = _paperQueue.Count > 0 ? _paperQueue.Dequeue() : "未获取到paperGuid";//从队列的开始出返回一个对象; File.AppendAllText("E:/CrazyGame/SasSystem/SasSystem/upload/paper-calculate-log.txt", DateTime.Now + ":" + paperGuid + "客观分数计算完成" + "当前队列数目：" + _paperQueue.Count + Environment.NewLine); _hasNew.Set(); } static bool isFirst = true; // 公开一个Add方法，用于向队列中添加内容然后供外部调用 public static void Add(string paperGuid) { _paperQueue.Enqueue(paperGuid); if (isFirst) { isFirst = false; _hasNew.Set(); } } } }2.添加一个调用的入口：
MVC
public class HomeController : Controller { public ActionResult Index() { Task.Run(() => { for (var i = 0; i < 500; i++) { AsyncThreadHelper.Add(i+"----index-task-sj" + Guid.NewGuid().ToString()); Thread.Sleep(1000); } }); return View(); } } WebForm using System; using System.Collections.Generic; using System.Linq; using System.Threading; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using Utility.Web; namespace SasSystem { public partial class AsyncThreadDemo : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { for (var i = 0; i < 500; i++) { AsyncThreadHelper.Add(i + "----index-task-sj" + Guid.NewGuid().ToString()); Thread.Sleep(1000); } } } } 访问 Home/Index或AsyncThreadDemo.aspx，页面迅速结束，task的多线程任然继续工作,直到循环500次后结束，或者IIS重启后。