C#:简单线程样例

1、定义线程类及内部事件

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace ThreadSample
{
    public delegate void ThreadEventHandler(object sender, EventArgs e);
    public class myThread
    {
        //线程执行开始调用事件
        public event ThreadEventHandler RequestEvent;
        //线程执行结束调用事件
        public event ThreadEventHandler CompletedEvent;
        //是否允许执行线程中具体任务
        public bool isExecute = false;
        //线程名称
        private string threadName = "线程";   //string.Empty;
        public string ThreadName
        {
            get { return threadName; }
        }

        public void Start()
        {
            try
            {
                //执行前调用事件
                RequestEvent(this, null);
                if (isExecute)
                {
                    //执行任务
                    Random seed = new Random(DateTime.Now.Millisecond);
                    int sleepTime = seed.Next(100, 300);
                    Thread.Sleep(sleepTime);
                }

                threadName += Thread.CurrentThread.ManagedThreadId.ToString();

                //执行后调用事件
                CompletedEvent(this, null);
            }
            catch (Exception ex)
            {
                //记录错误日志追踪文件
            }
        }
    }
}

2、在外部调用线程，并添加线程事件内容，及其监视器实现同步

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;

namespace ThreadSample
{
    

    public partial class frmApp : Form
    {
        public frmApp()
        {
            InitializeComponent();
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            Environment.Exit(0);
        }

        private void btnRun_Click(object sender, EventArgs e)
        {
            try
            {
                int threadCount = 10;
                this.tbMonitor.Clear();      //显示监视线程的信息
                myThread[] threadArray = new myThread[threadCount];
                Thread td = null;
                for (int i = 0; i < threadCount; i++)
                {
                    threadArray[i] = new myThread();
                    threadArray[i].RequestEvent += frmApp_RequestEvent;
                    threadArray[i].CompletedEvent += frmApp_CompletedEvent;
                    td = new Thread(threadArray[i].Start);
                    td.Start();
                }
            }
            catch (Exception ce)
            {
                MessageBox.Show(ce.ToString());
            }
        }

        //记录线程信息
        private delegate void RecordsEventHandler(object sender, EventArgs e);

        //依据线程调用次方法的先后显示信息
        private void frmApp_CompletedEvent(object sender, EventArgs e)  //sender太泛，可以给准确名字（myThread）
        {
            if (this.tbMonitor.InvokeRequired)
            {
                this.tbMonitor.Invoke(new RecordsEventHandler(frmApp_CompletedEvent), new object[] { sender, e });
            }
            else
            {
                try
                {
                    Monitor.Enter(this.tbMonitor);  //同步机制，指定对象获取排它锁

                    //具体操作
                    this.tbMonitor.Text += (sender as myThread).ThreadName + "--- ---" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fffff ") + Environment.NewLine;
                
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                    //记录错误日志追踪文件
                }
                finally
                {
                    Monitor.Exit(this.tbMonitor);   //同步机制，指定对象释放排它锁
                }
            }
        }

        private void frmApp_RequestEvent(object sender, EventArgs e)
        {
            //是否允许执行线程中具体任务
            (sender as myThread).isExecute = true;
        }
    }
}

注意：监视器实现同步的对象是否必须调用Invoke()方法。