asp.net 可以使用多线程吗？

Question

asp.net 可以使用多线程吗？
如果可以，怎么实现同时运行N个线程，某个线程运行结束，主动在放列队线程去运行。

Answer 1

using System;
using System.Collections.Generic;
using System.Threading;
using System.Collections;
namespace Test
{
    class Program 
    {
        static ArrayList arraylist = new ArrayList();
        static Thread[] threads = new Thread[5];
        /// <summary>
        /// clear arraylist finished self-defined method
        /// </summary>
        static event EventHandler OnFinished;
        static void Main()
        {
            #region 初始化数据
            Random r = new Random();
            for (int i = 0; i < 50; i++)
            {
                arraylist.Add(r.Next(1000));
            }
            #endregion             Console.WriteLine("clear arraylist begin!");
            for(int i=0;i<threads.Length;i++)
            {
                threads[i] = new Thread(new ThreadStart(DelMorethen50));
                threads[i].Name = "thread" + i.ToString();
                threads[i].Start();
            }
            OnFinished += new EventHandler(Program_OnFinished);            
        }        /// <summary>
        /// 清除完成执行事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        static void Program_OnFinished(object sender, EventArgs e)
        {
            Console.WriteLine("clear arraylist finished!");
            for (int i = 0; i < threads.Length; i++)
            {
                threads[i].Abort();//终止线程
            }
            
        }        /// <summary>
        /// 线程调用方法
        /// </summary>
        static void DelMorethen50()
        {
            while (true)
            {
                Monitor.Enter(arraylist.SyncRoot);
                if (arraylist.Count == 0) Program_OnFinished(arraylist.SyncRoot, new EventArgs());
                int num = (int)arraylist[0];
                arraylist.RemoveAt(0);
                Console.WriteLine("{0}\t{1}\t{2}", Thread.CurrentThread.Name, "deleted", num);
                Monitor.Exit(arraylist.SyncRoot);
                Thread.Sleep(20);            }
        }
    }
    
}

Answer 2

可以，最好用线程池。
参见Multithreading in ASP.NET 
http://www.beansoftware.com/ASP.NET-Tutorials/Multithreading-Thread-Pool.aspxASP.NET多线程范例1
http://blog.csdn.net/gloomyboyo/archive/2006/08/09/1042187.aspx还有一个ms的教程:
ASP.NET多线程编程(一)
http://msevents.microsoft.com/CUI/EventDetail.aspx?EventID=1032327989&Culture=zh-CNgood luck

Answer 3

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Net;
namespace 多线程列队
{
    public partial class Form4 : Form
    {
        public Form4()
        {
            InitializeComponent();
        }
        static public ManualResetEvent synchro = null;
        private int n  ;     //并发数   
        private int num = -1;
        private int TT ;        private void Start()
        {
            for (int m = 0; m < TT; m++)//共有100个   
            {
                ThreadStart myThreadDelegate = new ThreadStart(this.go);
                Thread myThread = new Thread(myThreadDelegate);                if (n > 0)
                {
                    n--;
 
                    Add("@启动线程-   " + m);
                    myThread.Start();
                }
                else
                {
                    synchro = new ManualResetEvent(false);
                    synchro.WaitOne();     //等待   
                    n--;
                    Add("@启动线程-   " + m);
                    myThread.Start();
                }
            }
        }        public void go()
        {
            int i = 0;
            i = Interlocked.Increment(ref num);
            Add2("执行线程-   " + i + " " + DateTime.Now);
            
            //模拟任务执行时间
            //Thread.Sleep(RandomTime());
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://www.163.com");
            request.ProtocolVersion = HttpVersion.Version11;
            request.Credentials = CredentialCache.DefaultCredentials;
            request.Timeout = 60 * 1000;//60秒钟
            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";            HttpWebResponse response = (HttpWebResponse)request.GetResponse();            n++;
            if (n > 0)
            {
                synchro.Set();//激活等待
            }
            Add2("结束线程-   " + i + " " + DateTime.Now);
            Remove("@启动线程-   " + i);
        }
        private int RandomTime()
        {
            Random R = new Random();            return R.Next(1000, 12000);
        }                #region 跨线程控制控件
        public delegate void OutPutDelegate(object outputStr);
        public void Add(object outputStr)
        {
            if (this.InvokeRequired)
            {
                OutPutDelegate opd = new OutPutDelegate(Add);
                this.BeginInvoke(opd, new object[] { outputStr });
            }
            else
            {
                listBox1.Items.Add(outputStr);
            }
        }
        public void Remove(object outputStr)
        {
            if (this.InvokeRequired)
            {
                OutPutDelegate opd = new OutPutDelegate(Remove);
                this.BeginInvoke(opd, new object[] { outputStr });
            }
            else
            {
                listBox1.Items.Remove(outputStr);
            }
        }        public delegate void OutPutDelegate2(object outputStr);
        public void Add2(object outputStr)
        {
            if (this.InvokeRequired)
            {
                OutPutDelegate2 opd = new OutPutDelegate2(Add2);
                this.BeginInvoke(opd, new object[] { outputStr });
            }
            else
            {
                listBox2.Items.Add(outputStr);
            }
        }
        public void Remove2(object outputStr)
        {
            if (this.InvokeRequired)
            {
                OutPutDelegate2 opd = new OutPutDelegate2(Remove2);
                this.BeginInvoke(opd, new object[] { outputStr });
            }
            else
            {
                listBox2.Items.Remove(outputStr);
            }
        }
        #endregion        private void button1_Click(object sender, EventArgs e)
        {
            n = Convert.ToInt32(textBox1.Text.Trim());
            TT = Convert.ToInt32(textBox2.Text.Trim());
            Thread th = new Thread(new ThreadStart(Start));
            th.Start();        }
    }
}
asp.net 跟Winfrom 有点不一样，不能实时显示进度。可以通过在多线程里面进度写入到缓存，再由网页读取缓存，显示进度。

Answer 4

http://www.cnblogs.com/zhangaz1/articles/1073175.html
http://www.cnblogs.com/GavinCome/archive/2008/06/03/1212966.html

Answer 5

http://www.cnblogs.com/GavinCome/archive/2008/06/03/1212966.html