C# Producer Consumer （生产者消费者模式）demo

     刚接触C#不久，想做个C，C++ Server中经常使用的Producer Consumer模式，以满足多任务排队多线程处理的模式。于是写了下面的demo。
     第一套代码将producer Consumer的逻辑写到from类里了，方便在demo的显示界面动态显示模拟生产和消费的过程。
     第二套代码将producer Consumer的逻辑单独写到一个类中，使用委托的方法在from中回显生产消费的过程。
     Demo中均以3个线程作为消费者，1个线程作为生产者为例。 
     由于是C#新手，有不对的地方望不吝赐教。

     先贴下窗口截图，动态生产消费进度显示

第一套代码：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Threading;namespace ProducerConsumerDemo{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)        {            StopFlag = false;            StartDemo();        }        private void button2_Click(object sender, EventArgs e)        {            StopFlag = true;        }        public class TaskInfo        {            public int Index;            public TaskInfo()            {            }            public TaskInfo(int index)            {                this.Index = index;            }        }        private static bool StopFlag = false;        private int ProducerNumber = 1;        private int ConsumerNumber = 3;// 共用任务队列        private Queue<TaskInfo> TaskQueue = new Queue<TaskInfo>();        private Semaphore TaskSemaphore = new Semaphore(0, 256);        private object myLock = new object();        private void StartDemo()        {            StartProducer(ProducerNumber);            Thread.Sleep(2000);            StartConsumer(ConsumerNumber);        }        private void StartProducer(int num)        {            for (int i = 0; i < num; i++)            {                Thread t = new Thread(new ThreadStart(Producer));                t.Name = "Producer_" + (i + 1);                t.Start();            }        }        private void StartConsumer(int num)        {            for (int i = 0; i < num; i++)            {                Thread t = new Thread(new ParameterizedThreadStart(this.Consumer));                t.Name = "Consumer_" + (i + 1);                t.IsBackground = true;                t.Start(i + 1);            }        }// 线程间控件调用，需要使用委托        public delegate void ProducerTextDelegate(string AddStr);        public delegate void ComsumerTextDelegate(int Index, string AddStr);// 生产者        private void Producer()        {            int i = 0;            while (!StopFlag)            {                TaskInfo Task = new TaskInfo(++i);                lock (myLock)// 任务队列为临界资源，需要锁                {                    TaskQueue.Enqueue(Task);                }                TaskSemaphore.Release(1);// 每添加一个任务，信号量加1                 string AddText = String.Format("Task {0} was Produced.\r\n", Task.Index);                ChangeProducerText(AddText);// 修改textBox输出                Thread.Sleep(1000);            }        }// 消费者        private void Consumer(object data)        {            int Index = (int)data;            TaskInfo GetTask = null;            while (true)            {                TaskSemaphore.WaitOne();                lock (myLock)                {                    GetTask = TaskQueue.Dequeue();                }                string AddStr = String.Format("Consumer {0} take Task {1}\r\n", Index, GetTask.Index);                ChangeConsumerText(Index, AddStr);                Random r = new Random();                Thread.Sleep(r.Next(5) * 1000);// 休眠随机事件，模拟实际任务的每个任务的不同时常// 此处应为任务处理            }        }        private void ChangeProducerText(string AddStr)        {            if (textBox1.InvokeRequired)            {                ProducerTextDelegate pd = new ProducerTextDelegate(ChangeProducerText);                textBox1.Invoke(pd, new object[] { AddStr });            }            else            {                textBox1.AppendText(AddStr);            }        }        private void ChangeConsumerText(int Index, string AddStr)        {            TextBox currentTextBox = null;            switch (Index)            {                case 1:                    currentTextBox = this.textBox2;                    break;                case 2:                    currentTextBox = this.textBox3;                    break;                case 3:                    currentTextBox = this.textBox4;                    break;                default:                    break;            }            if (currentTextBox.InvokeRequired)            {                ComsumerTextDelegate cd = new ComsumerTextDelegate(ChangeConsumerText);                currentTextBox.Invoke(cd, new object[] { Index, AddStr });            }            else            {                currentTextBox.AppendText(AddStr);            }        }    }}

第二套代码：

// Form1.csusing System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Threading;namespace ProducerConsumerDemo{// 定义修改输出的委托    public delegate void ShowTextDelegate(int Index, string Addstr);    public partial class Form1 : Form    {        Work work = null;        public Form1()        {            InitializeComponent();            work = new Work();            work.ShowTextEvent += new ShowTextDelegate(ChangeTextValue);        }        private void button1_Click(object sender, EventArgs e)        {             work.Start();        }        private void button2_Click(object sender, EventArgs e)        {            work.Stop();        }// new Work 中再起的子线程调用的ShowTextDelegate委托事件，所以需要委托才能调用textBox控件        public delegate void ChangeTextDelegate(int Index, string AddStr);        private void ChangeTextValue(int Index, string AddStr)        {            TextBox ChangeTextBox = null;            switch (Index)            {                case 1:                    ChangeTextBox = this.textBox1;                    break;                case 2:                    ChangeTextBox = this.textBox2;                    break;                case 3:                    ChangeTextBox = this.textBox3;                    break;                case 4:                    ChangeTextBox = this.textBox4;                    break;                default:                    break;            }            if (ChangeTextBox.InvokeRequired)            {                ChangeTextDelegate pd = new ChangeTextDelegate(ChangeTextValue);                ChangeTextBox.Invoke(pd, new object[] { Index, AddStr });            }            else            {                ChangeTextBox.AppendText(AddStr);            }        }    }}// Work.csusing System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;namespace ProducerConsumerDemo{    public class Work    {        public Work()        {            StopFlag = false;        }        public void Start()        {            StopFlag = false;            StartDemo();        }        public void Stop()        {            StopFlag = true;        }        public class TaskInfo        {            public int Index;            public TaskInfo()            {            }            public TaskInfo(int index)            {                this.Index = index;            }        }        private static bool StopFlag = false;        private int ProducerNumber = 1;        private int ConsumerNumber = 3;        private Queue<TaskInfo> TaskQueue = new Queue<TaskInfo>();        private Semaphore TaskSemaphore = new Semaphore(0, 256);        private object myLock = new object();        public event ShowTextDelegate ShowTextEvent;        private void StartDemo()        {            StartProducer(ProducerNumber);            Thread.Sleep(2000);            StartConsumer(ConsumerNumber);        }        private void StartProducer(int num)        {            for (int i = 0; i < num; i++)            {                Thread t = new Thread(new ThreadStart(Producer));                t.Name = "Producer_" + (i + 1);                t.Start();            }        }        private void StartConsumer(int num)        {            for (int i = 0; i < num; i++)            {                Thread t = new Thread(new ParameterizedThreadStart(this.Consumer));                t.Name = "Consumer_" + (i + 1);                t.IsBackground = true;                t.Start(i + 1);            }        }        private void Producer()        {            int i = 0;            while (!StopFlag)            {                TaskInfo Task = new TaskInfo(++i);                lock (myLock)                {                    TaskQueue.Enqueue(Task);                }                TaskSemaphore.Release(1);                string AddText = String.Format("Task {0} was Produced.\r\n", Task.Index);                ShowTextEvent.Invoke(1, AddText);                Thread.Sleep(1000);            }        }        private void Consumer(object data)        {            int Index = (int)data;            TaskInfo GetTask = null;            while (true)            {                TaskSemaphore.WaitOne();                lock (myLock)                {                    GetTask = TaskQueue.Dequeue();                }                string AddStr = String.Format("Consumer {0} take Task {1}\r\n", Index, GetTask.Index);                ShowTextEvent.Invoke(Index + 1, AddStr);                Random r = new Random();                Thread.Sleep(r.Next(5) * 1000);            }        }    }}

        有错误的地方请指正，谢谢。