C# winform socket一个服务端和多个客户端进行通信

来源：互联网发布：中国变相殖民非洲知乎编辑：程序博客网时间：2024/04/29 01:27

参看此链接http://blog.csdn.net/zdyueguanyun/article/details/51207727

在上述代码的基础上进行了修改，包括一些捕获异常以及按钮的应用，扩充了一个listbox确保服务端可以选择和不同的客户端进行通信

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;using System.Net.Sockets;using System.Net;using System.Collections;namespace chat1{            public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();            StartPosition = FormStartPosition.CenterScreen;            //关闭对文本框的非线程操作检查            TextBox.CheckForIllegalCrossThreadCalls = false;        }        string RemoteEndPoint;     //客户端的网络结点        Thread threadwatch = null;//负责监听客户端的线程        Socket socketwatch = null;//负责监听客户端的套接字        //创建一个和客户端通信的套接字        Dictionary<string, Socket> dic = new Dictionary<string, Socket> { };   //定义一个集合，存储客户端信息                private void button1_Click(object sender, EventArgs e)        {            this.button1.Enabled = false;            //定义一个套接字用于监听客户端发来的消息，包含三个参数（IP4寻址协议，流式连接，Tcp协议）            socketwatch = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);            //服务端发送信息需要一个IP地址和端口号            IPAddress address = IPAddress.Parse(textBox1.Text.Trim());//获取文本框输入的IP地址            //将IP地址和端口号绑定到网络节点point上            IPEndPoint point = new IPEndPoint(address,int.Parse(textBox2.Text.Trim()));//获取文本框上输入的端口号            //此端口专门用来监听的            //监听绑定的网络节点            socketwatch.Bind(point);            //将套接字的监听队列长度限制为20            socketwatch.Listen(20);                        //创建一个监听线程            threadwatch = new Thread(watchconnecting);                          //将窗体线程设置为与后台同步，随着主线程结束而结束            threadwatch.IsBackground = true;              //启动线程               threadwatch.Start();              //启动线程后 textBox3文本框显示相应提示           textBox3.AppendText("开始监听客户端传来的信息!" + "\r\n");                  }        void OnlineList_Disp(string Info)        {            listBoxOnlineList.Items.Add(Info);   //在线列表中显示连接的客户端套接字        }                //监听客户端发来的请求        private void watchconnecting()        {            Socket connection = null;            while (true)  //持续不断监听客户端发来的请求               {                try                  {                       connection = socketwatch.Accept();                  }                   catch (Exception ex)                   {                      textBox3.AppendText(ex.Message); //提示套接字监听异常                       break;                    }                //获取客户端的IP和端口号                IPAddress clientIP = (connection.RemoteEndPoint as IPEndPoint).Address;                int clientPort = (connection.RemoteEndPoint as IPEndPoint).Port;                //让客户显示"连接成功的"的信息                string sendmsg = "连接服务端成功！\r\n" + "本地IP:" + clientIP + "，本地端口" + clientPort.ToString();                byte[] arrSendMsg = Encoding.UTF8.GetBytes(sendmsg);                 connection.Send(arrSendMsg);                RemoteEndPoint = connection.RemoteEndPoint.ToString(); //客户端网络结点号                textBox3.AppendText("成功与" + RemoteEndPoint + "客户端建立连接！\t\n");     //显示与客户端连接情况                dic.Add(RemoteEndPoint, connection);    //添加客户端信息                OnlineList_Disp(RemoteEndPoint);    //显示在线客户端                                //IPEndPoint netpoint = new IPEndPoint(clientIP,clientPort);                                IPEndPoint netpoint = connection.RemoteEndPoint as IPEndPoint;                                //创建一个通信线程                    ParameterizedThreadStart pts = new ParameterizedThreadStart(recv);                Thread thread = new Thread(pts);                   thread.IsBackground = true;//设置为后台线程，随着主线程退出而退出                   //启动线程                   thread.Start(connection);               }           }            ///           /// 接收客户端发来的信息            ///           ///客户端套接字对象          private void recv(object socketclientpara)        {                        Socket socketServer = socketclientpara as Socket;            while (true)               {                   //创建一个内存缓冲区 其大小为1024*1024字节  即1M                   byte[] arrServerRecMsg = new byte[1024 * 1024];                   //将接收到的信息存入到内存缓冲区,并返回其字节数组的长度                  try                {                    int length = socketServer.Receive(arrServerRecMsg);                    //将机器接受到的字节数组转换为人可以读懂的字符串                       string strSRecMsg = Encoding.UTF8.GetString(arrServerRecMsg, 0, length);                                        //将发送的字符串信息附加到文本框txtMsg上                       textBox3.AppendText("客户端:" + socketServer.RemoteEndPoint+",time:" + GetCurrentTime() + "\r\n" + strSRecMsg + "\r\n\n");                }                catch (Exception ex)                {                    textBox3.AppendText("客户端"+socketServer.RemoteEndPoint+"已经中断连接"+"\r\n"); //提示套接字监听异常                     listBoxOnlineList.Items.Remove(socketServer.RemoteEndPoint.ToString());//从listbox中移除断开连接的客户端                    socketServer.Close();//关闭之前accept出来的和客户端进行通信的套接字                    break;                   }            }                   }        ///            /// 获取当前系统时间的方法           ///            /// 当前时间           private DateTime GetCurrentTime()           {               DateTime currentTime = new DateTime();               currentTime = DateTime.Now;               return currentTime;           }        //发送信息到客户端         private void button2_Click(object sender, EventArgs e)        {            string sendMsg = textBox4.Text.Trim();  //要发送的信息            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(sendMsg);   //将要发送的信息转化为字节数组，因为Socket发送数据时是以字节的形式发送的            if (listBoxOnlineList.SelectedIndex == -1)            {                MessageBox.Show("请选择要发送的客户端！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Stop);            }            else            {                string selectClient = listBoxOnlineList.Text;  //选择要发送的客户端                dic[selectClient].Send(bytes);   //发送数据                textBox4.Clear();                textBox3.AppendText(label4.Text + GetCurrentTime() + "\r\n" + sendMsg + "\r\n");               }                           }                     //快捷键 Enter 发送信息        private void textBox4_KeyDown(object sender, KeyEventArgs e)        {            //如果用户按下了Enter键               if (e.KeyCode == Keys.Enter)            {                string sendMsg = textBox4.Text.Trim();  //要发送的信息                byte[] bytes = System.Text.Encoding.UTF8.GetBytes(sendMsg);                 if (listBoxOnlineList.SelectedIndex == -1)                {                    MessageBox.Show("请选择要发送的客户端！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Stop);                }                else                {                    string selectClient = listBoxOnlineList.Text;  //选择要发送的客户端                    dic[selectClient].Send(bytes);   //发送数据                    textBox4.Clear();                    textBox3.AppendText(label4.Text + GetCurrentTime() + "\r\n" + sendMsg + "\r\n");                }            }        }        private void Form1_Load(object sender, EventArgs e)        {        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            DialogResult result = MessageBox.Show("是否退出？选否,最小化到托盘", "操作提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);            if (result == DialogResult.Yes)            {                this.Dispose();            }            else if (result == DialogResult.Cancel)            {                e.Cancel = true;            }            else            {                e.Cancel = true;                this.WindowState = FormWindowState.Minimized;                this.Visible = false;                this.notifyIcon1.Visible = true;                this.ShowInTaskbar = false;            }        }        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)        {            base.Visible = true;            this.notifyIcon1.Visible = false;            this.ShowInTaskbar = true;            //base.Show();            base.WindowState = FormWindowState.Normal;        }     }}

以下是客户端的代码：

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;using System.Net.Sockets;using System.Net;namespace chat2{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();            StartPosition = FormStartPosition.CenterScreen;            //关闭对文本框的非法线程操作检查            TextBox.CheckForIllegalCrossThreadCalls = false;        }        //创建 1个客户端套接字 和1个负责监听服务端请求的线程        Thread threadclient = null;        Socket socketclient = null;        List<IPEndPoint> mlist =new List<IPEndPoint>();        private void button1_Click(object sender, EventArgs e)        {            //SocketException exception;            this.button1.Enabled = false;            //定义一个套接字监听            socketclient = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);            //获取文本框中的IP地址            IPAddress address = IPAddress.Parse(textBox1.Text.Trim());            //将获取的IP地址和端口号绑定在网络节点上            IPEndPoint point = new IPEndPoint(address,int.Parse(textBox2.Text.Trim()));            try            {                //客户端套接字连接到网络节点上，用的是Connect                socketclient.Connect(point);            }            catch (Exception )            {                //MessageBox.                MessageBox.Show("连接失败\r\n");                this.button1.Enabled = true;                return;            }                        threadclient=new Thread(recv);            threadclient.IsBackground=true;            threadclient.Start();        }                        // 接收服务端发来信息的方法          private void recv()//        {            int x = 0;            while (true)//持续监听服务端发来的消息            {                try                {                    //定义一个1M的内存缓冲区，用于临时性存储接收到的消息                    byte[] arrRecvmsg = new byte[1024 * 1024];                    //将客户端套接字接收到的数据存入内存缓冲区，并获取长度                    int length = socketclient.Receive(arrRecvmsg);                    //将套接字获取到的字符数组转换为人可以看懂的字符串                    string strRevMsg = Encoding.UTF8.GetString(arrRecvmsg, 0, length);                    if (x == 1)                    {                        textBox3.AppendText("服务器:" + GetCurrentTime() + "\r\n" + strRevMsg + "\r\n\n");                    }                    else                    {                        textBox3.AppendText(strRevMsg + "\r\n\n");                        x = 1;                    }                }                catch(Exception ex)                {                    textBox3.AppendText("远程服务器已经中断连接"+"\r\n");                    this.button1.Enabled = true;                    break;                }            }        }        //获取当前系统时间        private DateTime GetCurrentTime()        {            DateTime currentTime = new DateTime();            currentTime = DateTime.Now;            return currentTime;         }        //发送字符信息到服务端的方法        private void ClientSendMsg(string sendMsg)        {            //将输入的内容字符串转换为机器可以识别的字节数组               byte[] arrClientSendMsg = Encoding.UTF8.GetBytes(sendMsg);               //调用客户端套接字发送字节数组               socketclient.Send(arrClientSendMsg);               //将发送的信息追加到聊天内容文本框中               textBox3.AppendText(this.label4.Text+": " + GetCurrentTime() + "\r\n" + sendMsg + "\r\n\n");         }        //点击按钮button2 向服务端发送信息         private void button2_Click(object sender, EventArgs e)        {            //调用ClientSendMsg方法 将文本框中输入的信息发送给服务端               ClientSendMsg(textBox4.Text.Trim());            textBox4.Clear();        }                       private void textBox4_KeyDown_1(object sender, KeyEventArgs e)        {            //当光标位于文本框时 如果用户按下了键盘上的Enter键            if (e.KeyCode == Keys.Enter)            {                //则调用客户端向服务端发送信息的方法                  ClientSendMsg(textBox4.Text.Trim());                textBox4.Clear();            }        }        private void Form1_Load(object sender, EventArgs e)        {        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            DialogResult result = MessageBox.Show("是否退出？选否,最小化到托盘", "操作提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);            if (result == DialogResult.Yes)            {                this.Dispose();            }            else if (result == DialogResult.Cancel)            {                e.Cancel = true;                            }            else            {                e.Cancel = true;                this.WindowState = FormWindowState.Minimized;                this.Visible = false;                this.notifyIcon1.Visible = true;                this.ShowInTaskbar = false;            }        }        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)        {            base.Visible = true;            this.notifyIcon1.Visible = false;            this.ShowInTaskbar = true;            //base.Show();            base.WindowState = FormWindowState.Normal;        }    }}

运行结果：

程序还有不足，后期还会继续改进

客户端在断开连接后，应该把socket关闭；

if (result == DialogResult.Yes)

{
           if (socketclient == null)
            {
                    this.Dispose();
            }
            else
            {
                socketclient.Close();
                this.Dispose();
             }

}

其他错误，欢迎大家指出，需要完善的地方，也希望大家给出建议

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