基于TCP网络通信程序设计

1.服务器端

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;//添加名空间using System.IO;using System.Net;using System.Net.Sockets;using System.Threading;namespace 服务器端{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private bool bConnected = false;        private Thread tAcceptMsg = null;        private IPEndPoint IPP = null;//用于Socket通信的IP地址和端口        private Socket socket = null;        private Socket clientSocket = null;        private NetworkStream nStream = null;//网络访问的基础数据流        private TextReader tReader = null;        private TextWriter wReader = null;        private void AcceptMessage()        {            clientSocket = socket.Accept();//一直等待连接            if (clientSocket != null)            {                bConnected = true;                this.label1.Text = "与客户" + clientSocket.RemoteEndPoint.ToString() + "成功建立连";            }            nStream = new NetworkStream(clientSocket);            tReader = new StreamReader(nStream);            wReader = new StreamWriter(nStream);            string sTemp;            while (bConnected)            {                try                {                    sTemp = tReader.ReadLine();                    if (sTemp.Length != 0)                    {                        lock (this)                        {                            richTextBoxReceive.Text = "客户机：" + sTemp + Environment.NewLine + richTextBoxReceive.Text;                        }                    }                }                catch                {                    tAcceptMsg.Abort();                    MessageBox.Show("无法与客户机进行通信。");                }            }            clientSocket.Shutdown(SocketShutdown.Both);            clientSocket.Close();            socket.Shutdown(SocketShutdown.Both);            socket.Close();        }        private void Form1_Load(object sender, EventArgs e)        {            this.label1.Text = "无客户机请求连接";        }        private void buttonStart_Click(object sender, EventArgs e)        {            //指定服务器端口，Any表示服务器侦听所有网络接口上的客户活动            IPP = new IPEndPoint(IPAddress.Any, 65535);            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            socket.Bind(IPP);            socket.Listen(0);//0表示连接数量不限            //创建侦听线程            tAcceptMsg = new Thread(new ThreadStart(this.AcceptMessage));            tAcceptMsg.Start();            buttonStart.Enabled = false;        }        private void richTextBoxSend_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar == (char)Keys.Enter)            {                if (bConnected)                {                    try                    {                        lock (this)                        {                            richTextBoxReceive.Text = "我：" + richTextBoxSend.Text + richTextBoxReceive.Text;                            //客户机聊天信息写入网络流，以便服务器接受                            wReader.WriteLine(richTextBoxSend.Text);                            wReader.Flush();                            richTextBoxSend.Text = "";                            richTextBoxSend.Focus();                        }                    }                    catch                    {                        MessageBox.Show("无法与客户机通信");                    }                }                else                {                    MessageBox.Show("未与客户机建立连接，不能通信。");                }            }        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            try            {                socket.Close();                tAcceptMsg.Abort();            }            catch{}        }    }}

2.客户端

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;//添加命名空间using System.IO;using System.Net;using System.Net.Sockets;using System.Threading;namespace 客户端{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();            CheckForIllegalCrossThreadCalls = false;//禁用此异常        }        public bool bconnected = false;        public Thread tAcceptMsg = null;        public IPEndPoint IPP = null;        public Socket socket = null;        public NetworkStream nStream = null;        public TextWriter wReader = null;        public TextReader tReader = null;        public void AcceptMessage()        {            string sTemp;            while (bconnected)            {                try                {                    sTemp = tReader.ReadLine();                    if (sTemp.Length != 0)                    {                        lock (this)                        {                            richTextBoxReceive.Text = "服务器：" + sTemp + Environment.NewLine + richTextBoxReceive.Text;                        }                    }                }                catch                {                    MessageBox.Show("无法与服务器通信。");                }            }            socket.Shutdown(SocketShutdown.Both);            socket.Close();        }        private void buttonLink_Click(object sender, EventArgs e)        {            if (textBoxIPAdress.Text == "") { MessageBox.Show("IP地址不能为空！！"); return; }            if (textBoxPort.Text == "") { MessageBox.Show("端口号不能为空！！"); return; }            try            {                IPP = new IPEndPoint(IPAddress.Parse(textBoxIPAdress.Text),                    int.Parse(textBoxPort.Text));                socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream,                    ProtocolType.Tcp);                socket.Connect(IPP);                if (socket.Connected)                {                    nStream = new NetworkStream(socket);                    tReader = new StreamReader(nStream);                    wReader = new StreamWriter(nStream);                    tAcceptMsg = new Thread(new ThreadStart(this.AcceptMessage));                    tAcceptMsg.Start();                    bconnected = true;                    buttonLink.Enabled = false;                    MessageBox.Show("与服务器成功建立连接，可以通信。");                }            }            catch            {                MessageBox.Show("无法与服务器通信。");            }        }        private void richTextBoxsend_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar ==(char)Keys.Enter)            {                if (bconnected)                {                    try                     {                        lock (this)                        {                            richTextBoxReceive.Text = "我：" + richTextBoxsend.Text + richTextBoxReceive.Text;                            wReader.WriteLine(richTextBoxsend.Text);                            wReader.Flush();                            richTextBoxsend.Text = "";                            richTextBoxsend.Focus();                        }                    }                    catch                    {                        MessageBox.Show("与服务器连接断开。");                    }                }                else                {                    MessageBox.Show("未与服务器建立连接，不能通信。");                }            }        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            try            {                socket.Close();                tAcceptMsg.Abort();            }            catch { }        }    }}