Sockte基础：实现服务器客户端交互

自己定制一个协议

Server:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace _123_服务器与客户端交互_聊天_Server
{
    public partial class FormServer : Form
    {
        public FormServer()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 点击按钮开始监听
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStart_Click(object sender, EventArgs e)
        {
            try
            {
                //创建一个负责监听(服务器IP地址和端口号)的Socket     // 网络协议IP V4版本       流式使用TCP协议
                Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                //创建IP地址和端口号对象
                IPAddress ip = IPAddress.Any;  //客户端的活动地址，可变      //IPAddress.Parse(txtServer.Text);这样子只会把txtServer.Text作为IP地址不可变。
                IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtPort.Text));
                //让负责监听的Socket绑定IP地址和端口号
                socketWatch.Bind(point);
                ShowMsg("监听成功");
                //设置监听队列
                socketWatch.Listen(10);//在某一时间点内最大容量
                Thread th = new Thread(Listen);
                th.IsBackground = true;
                th.Start(socketWatch);
            }
            catch
            {
                MessageBox.Show("Server项目的(btnStart_Click())可能出问题了，请找大师。");
            }
        }
        /// <summary>
        /// 将字符串显示在Log文本框中
        /// </summary>
        /// <param name="str">即将要显示的字符串</param>
        public void ShowMsg(string str)
        {
            txtLog.AppendText(str + "\r\n");
        }
        //将远程连接的客户端IP地址和Socket存入集合中
        Dictionary<string, Socket> dicSocket = new Dictionary<string, Socket>();
        //创建跟客户端通信的Socket类的变量
        Socket socketSend;
        /// <summary>
        /// 等待客户端的连接，并且创建与之通信的Socket
        /// </summary>
        public void Listen(object o)
        {
            Socket socketWatch = o as Socket;
            while (true)
            {
                try
                {
                    //负责监听的Socket 来接受客户端的连接（等待客户端连接）  并且创建跟客户端通信的Socket
                    //负责和客户端通信的Socket   
                    socketSend = socketWatch.Accept();
                    //将此时客户端ip和SocketSend存入
                    dicSocket.Add(socketSend.RemoteEndPoint.ToString(), socketSend);
                    //将此时客户端的ip地址和端口号存入下拉框中
                    cboUsers.Items.Add(socketSend.RemoteEndPoint.ToString());
                    //将谁(远程终结点)连接显示在文本框内
                    ShowMsg(socketSend.RemoteEndPoint.ToString() + "：连接成功");//获取远程终结点
                    //开启一个新线程，不停地接受客户端发来的消息
                    Thread th = new Thread(Receive);
                    th.IsBackground = true;
                    th.Start(socketSend);
                }
                catch
                {
                    MessageBox.Show("Server项目的(Listen())可能出问题了，请找大师。");
                }
            }
        }
        /// <summary>
        /// 服务器端不停地接受客户端发来的消息
        /// </summary>
        /// <param name="o"></param>
        public void Receive(object o)
        {
            Socket socketSend = o as Socket;
            while (true)
            {
                try
                {
                    //客户端连接成功后，服务器应该接受客户端发来的消息
                    byte[] buffer = new byte[1024 * 1024 * 2];
                    //实际接收到的有限字节数
                    int r = socketSend.Receive(buffer);
                    if (r == 0)
                    {
                        break;
                    }
                    string input = Encoding.UTF8.GetString(buffer, 0, r);
                    //显示客户端发送的数据
                    ShowMsg(DateTime.Now + "\r\n" + socketSend.RemoteEndPoint + ":" + input);
                }
                catch
                {
                    //
                    MessageBox.Show("Server项目的(Receive())可能出问题了，请找大师。");
                }
            }
        }
        /// <summary>
        /// 取消不可跨线程访问
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FormServer_Load(object sender, EventArgs e)
        {
            //取消不可跨线程访问
            Control.CheckForIllegalCrossThreadCalls = false;
        }
        private void FormServer_DoubleClick(object sender, EventArgs e)
        {
            ////当你点击关闭窗口的时候，判断线程是否为null
            //if (th != null)
            //{
            //    //th.Abort();//线程被Abort后就不能被Start了
            //    th = null;
            //}
        }
        /// <summary>
        /// 服务器给客户端发送消息
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSend_Click(object sender, EventArgs e)
        {
            string input = txtMsg.Text.Trim();
            byte[] buffer = Encoding.UTF8.GetBytes(input);
            //制定协议          字节数组第一位为0：文本消息   1：文件   2：震动
            List<byte> list = new List<byte>();
            list.Add(0);//给第一位赋值为0
            list.AddRange(buffer);
            //将泛型集合穿换成数组
            byte[] newBuffer = list.ToArray();  //buffer = list.ToArray();不可以 数组长度不一样了
            //获得用户在下拉框中选中的IP地址
            string ip = cboUsers.SelectedItem.ToString();
            dicSocket[ip].Send(newBuffer);
            //socketSend.Send(buffer);
            //发送成功后清除当前文本
            txtMsg.Clear();
            txtMsg.Focus();
        }
        private void btnSelect_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Title = "客官，请选择你要发送的文件";
            ofd.InitialDirectory = @"C:\Users\46124\Desktop";
            ofd.Filter = "文本文件|*.txt|媒体文件|*.wav|媒体文件|*.mp4|所有文件|*.*";
            ofd.ShowDialog();
            //将对话框选择的文件的全路径放入文本框中
            txtPath.Text = ofd.FileName;
        }
        /// <summary>
        /// 点击发送文件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSendFile_Click(object sender, EventArgs e)
        {
            //获得要发送文件的路径
            string path = txtPath.Text;
            using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))
            {
                byte[] buffer = new byte[1024 * 1024 * 5];
                int r = fsRead.Read(buffer, 0, buffer.Length);
                //制定协议          字节数组第一位为0：文本消息   1：文件   2：震动
                List<byte> list = new List<byte>();
                list.Add(1);
                list.AddRange(buffer);
                byte[] newBuffer = list.ToArray();
                //通过下拉框获取需要发送客户端的IP然后发送字节数组
                dicSocket[cboUsers.SelectedItem.ToString()].Send(newBuffer);
                MessageBox.Show("发送成功");
            }
        }
        /// <summary>
        /// 发送振动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnVibrate_Click(object sender, EventArgs e)
        {
            byte[] buffer = new byte[1];
            buffer[0] = 2;
            //通过下拉框获取需要发送客户端的IP然后发送字节数组
            dicSocket[cboUsers.SelectedItem.ToString()].Send(buffer);
        }
        private void btnClose_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

Client：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace _124_服务器与客户端交互_聊天_Client
{
    public partial class FormClient : Form
    {
        public FormClient()
        {
            InitializeComponent();
        }
        Socket socketSend;
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                //创建负责通信的Socket
                socketSend = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                //创建IP和端口号连接服务器
                IPAddress ip = IPAddress.Parse(txtServer.Text);
                IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtPort.Text));
                //获得要连接的远程服务器应用程序的IP地址和端口号
                socketSend.Connect(point);
                ShowMsg("连接成功");
                //开启一个新的线程不停地接受服务器发送来的消息
                Thread th = new Thread(Receive);
                th.IsBackground = true;
                th.Start();
            }
            catch
            {
                MessageBox.Show("连接服务器时出错，请找大师");
            }
        }
        /// <summary>
        /// 将字符串显示在Log文本框中
        /// </summary>
        /// <param name="str">即将要显示的字符串</param>
        public void ShowMsg(string str)
        {
            txtLog.AppendText(str + "\r\n");
        }
        /// <summary>
        /// 客户端给服务器发送消息
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSend_Click(object sender, EventArgs e)
        {
            //将客户端发送的数据string转化成byte发送
            string input = txtMsg.Text.Trim();
            byte[] buffer = Encoding.UTF8.GetBytes(input);
            socketSend.Send(buffer);
            //发送成功后清除当前文本
            txtMsg.Clear();
            txtMsg.Focus();
        }
        /// <summary>
        /// 不停的接受服务器发来的消息
        /// </summary>
        public void Receive()
        {
            try
            {
                while (true)
                {
                    byte[] buffer = new byte[1024 * 1024 * 2];
                    int r = socketSend.Receive(buffer);
                    if (r == 0)
                    {
                        break;
                    }
                    //使用协议判断字节数组第一位 0：文本消息  1：文件  2：震动
                    if (buffer[0] == 0)
                    {
                        string input = Encoding.UTF8.GetString(buffer, 1, r - 1);  //r-1是因为数组加了一位  数量多了一个
                        ShowMsg(DateTime.Now + "\r\n" + socketSend.RemoteEndPoint + ":" + input);
                    }
                    else if (buffer[0] == 1)
                    {
                        SaveFileDialog sfd = new SaveFileDialog();
                        sfd.InitialDirectory = @"C:\Users\46124\Desktop";
                        sfd.Title = "客官，请选择保存文件的地址";
                        sfd.Filter = "文本文件|*.txt|媒体文件|*.wav|媒体文件|*.mp4|所有文件|*.*";
                        sfd.ShowDialog(this);
                        string path = sfd.FileName;
                        using (FileStream fsWrite = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))
                        {
                            fsWrite.Write(buffer, 1, r - 1);
                            MessageBox.Show("接受成功");
                        }
                    }
                    else if (buffer[0] == 2)
                    {
                        Vibrate();
                    }
                }
            }
            catch
            {
                MessageBox.Show("(Client项目的Receive())可能出问题了，请找大师。");
            }
        }
        private void FormClient_Load(object sender, EventArgs e)
        {
            Control.CheckForIllegalCrossThreadCalls = false;
        }
        /// <summary>
        /// 振动
        /// </summary>
        public void Vibrate()
        {
            for (int i = 0; i < 2000; i++)
            {
                //Random r = new Random();
                //int rNumber = r.Next(100, 250);
                //this.Location = new Point(this.Location.X + rNumber, this.Location.Y + rNumber);
                this.Location = new Point(200, 200);
                this.Location = new Point(300, 300);
            }
        }
    }
}