黑马程序员_学习日记67_717ASP.NET（Socket聊天室）

 
以服务端为例，建立通信的步骤：
1、创建代表本机的节点对象：包括ip和port
2、创建负责监听的socket
3、在线程池中为负责监听的socket启用一个线程
4、接受客户端的一个连接，创建负责通信的socket
5、在线程池中为通信socket启用一个线程
6、用通信socket接收客户端发来的信息
7、向客户端发送消息
服务器端代码：

namespace ChatSerivce{    public delegate void TxtDel(string txt);    public partial class ServiceFrm : Form    {        List<Socket> clientSocketList = new List<Socket>();//与客户端通信的Socket的集合        private TxtDel SetTextDel;        public ServiceFrm()        {            InitializeComponent();            this.SetTextDel = SetTextForTxtHistory;        }        private void btnStart_Click(object sender, EventArgs e)        {            string ip = txtIP.Text;            IPAddress ipAddress = IPAddress.Parse(ip);            //1、创建代表本机的节点对象：包括ip和port            IPEndPoint ipEndPoint = new IPEndPoint(ipAddress, int.Parse(txtPort.Text));            //2、创建负责监听的socket            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            socket.Bind(ipEndPoint);            socket.Listen(10);//不要忘了            //3、在线程池中为负责监听的socket启用一个线程            ThreadPool.QueueUserWorkItem(new WaitCallback(ListenClient), socket);            txtHistory.Text += "服务端开始监听客户端连接了...\r\n";        }        //监听客户端连接        public void ListenClient(object obj)        {            Socket socket = (Socket)obj;            while (true)            {                //4、接受客户端的一个连接，创建负责通信的socket                Socket proxSocket = socket.Accept();                clientSocketList.Add(proxSocket);//将通信socket添加到通信socket集合中                //拿到客户端的端口和IP                //txtHistory.Text += proxSocket.RemoteEndPoint.ToString() + "\r\n";                this.Invoke(SetTextDel, proxSocket.RemoteEndPoint.ToString());                //5、在线程池中为通信socket启用一个线程                ThreadPool.QueueUserWorkItem(new WaitCallback(ConnectToClient), proxSocket);            }        }        //与客户端通信        public void ConnectToClient(object obj)        {            Socket socket = (Socket)obj;            try            {                while (socket.Connected)                {                    byte[] buffer = new byte[1024 * 1024 * 1];                    //6、用通信socket接收客户端发来的信息                    int realLength = socket.Receive(buffer, 0, buffer.Length, SocketFlags.None);                    string strResult = Encoding.Default.GetString(buffer, 0, realLength);                    //客户端调用shutdown                    if (realLength<=0)                    {                        break;                    }                    //txtHistory.Text += socket.RemoteEndPoint.ToString() + ":" + strResult + "\r\n";                    this.Invoke(SetTextDel, socket.RemoteEndPoint.ToString() + ":" + strResult);                }            }            catch (Exception ex)            {                socket.Close();                clientSocketList.Remove(socket); //从通信socket集合中移除当前socket                this.Invoke(SetTextDel, "\r\n客户端退出...");            }        }        public void SetTextForTxtHistory(string strTxt)        {            txtHistory.Text += strTxt + "\r\n";        }        //7、向客户端发送消息        private void btnSend_Click(object sender, EventArgs e)        {            string strTxt = txtMsg.Text;            byte[] data = Encoding.Default.GetBytes(strTxt);            foreach (var socket in clientSocketList)            {                socket.Send(data, 0, data.Length, SocketFlags.None);            }        }    }}

客户端代码：

namespace ChatClient{    public delegate void TxtDel(string txt);    public partial class ClientFrm : Form    {        public Socket CurrentSocket { get; set; }        private TxtDel SetTextDel;        public ClientFrm()        {            InitializeComponent();            this.SetTextDel = SetTextForTxtHistory;        }                private void btnCon_Click(object sender, EventArgs e)        {            string ip = txtIP.Text;            IPAddress ipAddress = IPAddress.Parse(ip);            IPEndPoint endPoint = new IPEndPoint(ipAddress, int.Parse(txtPort.Text));            try            {                CurrentSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);                CurrentSocket.Connect(endPoint);//服务端没有开启就会出现异常                ThreadPool.QueueUserWorkItem(new WaitCallback(ConnectToService), CurrentSocket);                txtHistory.Text += "与服务器建立连接...\r\n";            }            catch (Exception ex)            {                if (CurrentSocket != null)                {                    CurrentSocket.Dispose();                }            }        }        private void btnSend_Click(object sender, EventArgs e)        {            byte[] buffer = Encoding.Default.GetBytes(txtMsg.Text);            CurrentSocket.Send(buffer);        }        public void ConnectToService(object obj)        {            Socket socket = (Socket)obj;            try            {                while (socket != null && socket.Connected)                {                    byte[] buffer = new byte[1024 * 1024 * 1];                    int realLength = socket.Receive(buffer, 0, buffer.Length, SocketFlags.None);                    string strResult = Encoding.Default.GetString(buffer, 0, realLength);                    this.Invoke(SetTextDel, socket.RemoteEndPoint.ToString() + ":" + strResult);                }            }            catch (Exception ex)            {                CurrentSocket.Close();                this.Invoke(SetTextDel,"远程主机停止服务...");            }        }        public void SetTextForTxtHistory(string strTxt)        {            txtHistory.Text += strTxt + "\r\n";        }    }}