关于WEB线程问题，为什么线程会少呢？

Question

怎么会在web里用到线程，例如1个aspx页面请求，Page_Unload后就结束响应了

Answer 1

我在web里面开过一个线程，没发现问题。lz的代码看起来好像没什么问题，但是也没什么作用，最后都join了，全部结束后才返回个客户端。回头我试一试。

Answer 2

试了下，没有问题啊，点击两次，结果是:----------------------------------------
Timestamp: 23/12/2014 10:21:32 PMMessage: 192.168.1.101数据下载----------------------------------------
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Timestamp: 23/12/2014 10:21:32 PMMessage: 192.168.1.103数据下载----------------------------------------
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Timestamp: 23/12/2014 10:21:32 PMMessage: 192.168.1.100数据下载----------------------------------------
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Timestamp: 23/12/2014 10:21:32 PMMessage: 192.168.1.104数据下载----------------------------------------
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Timestamp: 23/12/2014 10:21:32 PMMessage: 192.168.1.102数据下载----------------------------------------
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Timestamp: 23/12/2014 10:21:56 PMMessage: 192.168.1.100数据下载----------------------------------------
----------------------------------------
Timestamp: 23/12/2014 10:21:56 PMMessage: 192.168.1.101数据下载----------------------------------------
----------------------------------------
Timestamp: 23/12/2014 10:21:56 PMMessage: 192.168.1.102数据下载----------------------------------------
----------------------------------------
Timestamp: 23/12/2014 10:21:56 PMMessage: 192.168.1.103数据下载----------------------------------------
----------------------------------------
Timestamp: 23/12/2014 10:21:56 PMMessage: 192.168.1.104数据下载----------------------------------------

Answer 3

代码和你基本也一样，只是用Enterprice library 做的log，是不是你写log函数里有什么问题，不是线程安全的？
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 Microsoft.Practices.EnterpriseLibrary.Common.Configuration;
using Microsoft.Practices.EnterpriseLibrary.Logging;namespace WebApplication2
{
    public partial class WebForm3 : System.Web.UI.Page
    {
        LogWriter logWriter = EnterpriseLibraryContainer.Current.GetInstance<LogWriter>();
        protected void Page_Load(object sender, EventArgs e)
        {        }        protected void Button1_Click(object sender, EventArgs e)
        {
            workthread();
        }        public void workthread()
        {
            try
            {
                Thread categoryThread100 = new Thread(new ThreadStart(download100));
                Thread categoryThread101 = new Thread(new ThreadStart(download101));
                Thread categoryThread102 = new Thread(new ThreadStart(download102));
                Thread categoryThread103 = new Thread(new ThreadStart(download103));
                Thread categoryThread104 = new Thread(new ThreadStart(download104));
                try
                {
                    categoryThread100.Start();
                }
                catch (Exception ex)
                {                    logWriter.Write(ex.ToString(), "Test");
                }
                try
                {
                    categoryThread101.Start();
                }
                catch (Exception ex)
                {                    logWriter.Write(ex.ToString(), "Test");
                }
                try
                {
                    categoryThread102.Start();
                }
                catch (Exception ex)
                {                    logWriter.Write(ex.ToString(), "Test");
                }                try
                {
                    categoryThread103.Start();
                }
                catch (Exception ex)
                {                    logWriter.Write(ex.ToString(), "Test");
                }
                try
                {
                    categoryThread104.Start();
                }
                catch (Exception ex)
                {                    logWriter.Write(ex.ToString(), "Test");
                }
                categoryThread100.Join();
                categoryThread101.Join();
                categoryThread102.Join();
                categoryThread103.Join();
                categoryThread104.Join();
            }
            catch (Exception ex)
            {
                Response.Write(ex);
            }        }        public void download100()
        {
            logWriter.Write("192.168.1.100数据下载", "Test");
        }
        public void download101()
        {            logWriter.Write("192.168.1.101数据下载", "Test");        }        public void download102()
        {            logWriter.Write("192.168.1.102数据下载", "Test");        }        public void download103()
        {            logWriter.Write("192.168.1.103数据下载", "Test");
        }
        public void download104()
        {            logWriter.Write("192.168.1.104数据下载", "Test");        }
    }
}

Answer 4

先指出1#的问题啊。不是pageload处理完了就结束请求了，在此之后还有好几个管道事件要处理的。楼主可以在每个start（）方法后面加上sleep，让每个线程启动后睡上100毫秒，看看能不能看到你预期的效果，Start（）方法仅仅是把该线程加到了cpu的可执行任务队列中去了，并没有立即执行，何时执行要看cpu的调度。

Answer 5

楼主把try catch 去掉试试