做了个winform的Socket服务端和客户端,能实现发送消息&文字
以下是图片和一些关键点,最后是代码,注释不多
服务端
服务端创建一个socket对象
参数:寻址方案,ip版本4 ;套接字类型,字节流;协议,TCP
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
这时候可以在外边创建new一个空的socket对象比如serverSocket.来保存上面创建的对象,这样其他地方就能使用这个socket
例外,在外部创建一个List<Socket> list 来保存连客户端socket对象.后面要用
socket需要ip地址和port,注意参数转换类型
socket.Bind(new IPEndPoint(IPAddress.Parse(txtIP.Text.ToString()), int.Parse(txtPort.Text)));
设置连接等待队列的数量
socket.Listen(10);
开始服务,等待客户端连接,这时候需要开另外一个线程 来做这些事情,AcceptClientConnect是自己写的一个方法,将socket传给它
ThreadPool.QueueUserWorkItem(new WaitCallback(this.AcceptClientConnect), socket);
下面是AcceptClientConnect的代码, 当有客户端连接时,创建一个Socket对象.变量名为proxSocket,并且保存到list中,方便以后使用,另外,需要在创建一个线程来处理该客户端socket发送过来的数据.
public void AcceptClientConnect(object socket){var serverSocket = socket as Socket;this.AppendTextToTxtLog("服务器端开始接受客户端的链接");while (true){try{var proxSocket = serverSocket.Accept();this.AppendTextToTxtLog(string.Format("客户端{0}连接上了", proxSocket.RemoteEndPoint.ToString()));ClientProxClentList.Add(proxSocket);//接受消息ThreadPool.QueueUserWorkItem(new WaitCallback(this.ReceiveData), proxSocket);}catch (Exception){}}}
其中AppendTextToTxtLog方法是给主窗口中传递文本信息,因为txtLog这个控件不是监听服务端连接的线程创建的.所以要用异步来让它把新消息复制到txtLog中,代码中if来判断是否是txtLog当前线程的控件
public void AppendTextToTxtLog(string txt){if (txtLog.InvokeRequired){txtLog.BeginInvoke(new Action<string>(s =>{this.txtLog.Text = string.Format("{0}\r\n{1}", s, txtLog.Text);}), txt);}else{this.txtLog.Text = string.Format("{0}\r\n{1}", txt, txtLog.Text);}}
下面是处理客户端发送过来的数据的代码,new一个byte[]数组,变量名为data,代销为1024*1024,用来保存客户端发来的数据. int readlen是实际接收到的数据的长度(data中没用的到部分会自动为null),服务端和客户端通信的时候,数据长度是大于0的.当数据长度等于0 的时候,说明客户端要断开连接,代码中有这个判断,还有try,catch捕获异常(这里处理的不怎么好),最后.当复合条件.发送过来的数据转换成字符串,这里用到了有效长度,截取,转换为字符串,添加到消息文本框中.
public void ReceiveData(object obj){Socket proxSocket = obj as Socket;byte[] data = new byte[1024 * 1024];while (true){int readLen = 0;try{readLen = proxSocket.Receive(data, 0, data.Length, SocketFlags.None);}catch (Exception ex){//异常退出时AppendTextToTxtLog(string.Format("客户端{0}非正常退出", proxSocket.RemoteEndPoint.ToString()));ClientProxClentList.Remove(proxSocket);StopConnetct(proxSocket);return;}if (readLen<=0){//客户端正常退出AppendTextToTxtLog(string.Format("客户端:{0}正常退出", proxSocket.RemoteEndPoint.ToString()));ClientProxClentList.Remove(proxSocket);StopConnetct(proxSocket);return;//方法结束->终结当前接受客户端数据的异步线程}string txt = Encoding.Default.GetString(data, 0, readLen);AppendTextToTxtLog(string.Format("接收到客户端{0}的消息{1}",proxSocket.RemoteEndPoint.ToString(),txt));}}
一下是发送消息的代码 ,这个客户端能发送字符串,文件和窗口晃动,在原本发送的byte[] data前面在增加一位,为1 的时候是发送字符串,2发送晃动.3发送文件,data数组前面加一位,new用一个新数组result,长度是data.length+1,之后用到了Buffer.BlockCopy()方法,参数分别是(原数组,原数组的开始位置,目标数组,目标数组的开始位置,原数组中取多长数据)
发送数据,客户端对象.Send(要发送的byte数组,开始位置,长度,发送接收行为),一般发送接收行为用SocketFlags.None就可以了.发送的时候遍历一下list中的客户端对象.判断一下是否连接.
private void btnSend_Click(object sender, EventArgs e){foreach (var proxSocket in ClientProxClentList){if (proxSocket.Connected){//原始的字符串转换成的字节数组byte[] data = Encoding.Default.GetBytes(txtSendMsg.Text);//在头部加上标记字节byte[] result = new byte[data.Length + 1];//头部协议字节 1:代表字符串result[0] = 1;Buffer.BlockCopy(data, 0, result, 1, data.Length);proxSocket.Send(result, 0, result.Length,SocketFlags.None);}}}
发送文件的方法,new一个新的byte数组,第一位设置为3,然后读取文件,转换为byte[]data,还是用Buffer.BlockCopy(),整合到变量名为result的byte数组中,遍历list中的客户端对象,如果是连接的,那么发送
private void button2_Click(object sender, EventArgs e){using (OpenFileDialog ofd =new OpenFileDialog()){if (ofd.ShowDialog()!=DialogResult.OK){return;}byte[] data = File.ReadAllBytes(ofd.FileName);byte[] result = new byte[data.Length + 1];result[0] = 3;Buffer.BlockCopy(data, 0, result, 1,data.Length);foreach (var proxSocket in ClientProxClentList){if (!proxSocket.Connected){continue;}proxSocket.Send(result, SocketFlags.None);}}}
最后一个是晃动的,只要发一个第一位是2的byte数组过去就好
private void button1_Click(object sender, EventArgs e){foreach (var proxSocket in ClientProxClentList){if (proxSocket.Connected){proxSocket.Send(new byte[] { 2 }, SocketFlags.None);}}}
下面是服务端的整体代码
using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.IO;using System.Linq;using ;using .Sockets;using System.Text;using System.Threading;using System.Threading.Tasks;using System.Windows.Forms;namespace ChatDemo{public partial class Mainfrm : Form{public Mainfrm(){InitializeComponent();}private Socket serverSocket;List<Socket> ClientProxClentList = new List<Socket>();private bool state = false;private void btnStart_Click(object sender, EventArgs e){if (!state){Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);serverSocket = socket;//ip portsocket.Bind(new IPEndPoint(IPAddress.Parse(txtIP.Text.ToString()), int.Parse(txtPort.Text)));//listensocket.Listen(10);//连接等待队列ThreadPool.QueueUserWorkItem(new WaitCallback(this.AcceptClientConnect), socket);state = true;btnStart.Text = "停止服务";}else{try{serverSocket.Close();serverSocket.Shutdown(SocketShutdown.Both);}catch (Exception){state = false;btnStart.Text = "开始服务";}}//对象}//日志文本框追加数据public void AppendTextToTxtLog(string txt){if (txtLog.InvokeRequired){txtLog.BeginInvoke(new Action<string>(s =>{this.txtLog.Text = string.Format("{0}\r\n{1}", s, txtLog.Text);}), txt);}else{this.txtLog.Text = string.Format("{0}\r\n{1}", txt, txtLog.Text);}}public void AcceptClientConnect(object socket){var serverSocket = socket as Socket;this.AppendTextToTxtLog("服务器端开始接受客户端的链接");while (true){try{var proxSocket = serverSocket.Accept();this.AppendTextToTxtLog(string.Format("客户端{0}连接上了", proxSocket.RemoteEndPoint.ToString()));ClientProxClentList.Add(proxSocket);//接受消息ThreadPool.QueueUserWorkItem(new WaitCallback(this.ReceiveData), proxSocket);}catch (Exception){}}}public void ReceiveData(object obj){Socket proxSocket = obj as Socket;byte[] data = new byte[1024 * 1024];while (true){int readLen = 0;try{readLen = proxSocket.Receive(data, 0, data.Length, SocketFlags.None);}catch (Exception ex){//异常退出时AppendTextToTxtLog(string.Format("客户端{0}非正常退出", proxSocket.RemoteEndPoint.ToString()));ClientProxClentList.Remove(proxSocket);StopConnetct(proxSocket);return;}if (readLen<=0){//客户端正常退出AppendTextToTxtLog(string.Format("客户端:{0}正常退出", proxSocket.RemoteEndPoint.ToString()));ClientProxClentList.Remove(proxSocket);StopConnetct(proxSocket);return;//方法结束->终结当前接受客户端数据的异步线程}string txt = Encoding.Default.GetString(data, 0, readLen);AppendTextToTxtLog(string.Format("接收到客户端{0}的消息{1}",proxSocket.RemoteEndPoint.ToString(),txt));}}private void btnSend_Click(object sender, EventArgs e){foreach (var proxSocket in ClientProxClentList){if (proxSocket.Connected){//原始的字符串转换成的字节数组byte[] data = Encoding.Default.GetBytes(txtSendMsg.Text);//在头部加上标记字节byte[] result = new byte[data.Length + 1];//头部协议字节 1:代表字符串result[0] = 1;Buffer.BlockCopy(data, 0, result, 1, data.Length);proxSocket.Send(result, 0, result.Length,SocketFlags.None);}}}private void StopConnetct(Socket proxSocket){try{if (proxSocket.Connected){proxSocket.Shutdown(SocketShutdown.Both);proxSocket.Close(100);}}catch (Exception ex){}}private void button2_Click(object sender, EventArgs e){using (OpenFileDialog ofd =new OpenFileDialog()){if (ofd.ShowDialog()!=DialogResult.OK){return;}byte[] data = File.ReadAllBytes(ofd.FileName);byte[] result = new byte[data.Length + 1];result[0] = 3;Buffer.BlockCopy(data, 0, result, 1,data.Length);foreach (var proxSocket in ClientProxClentList){if (!proxSocket.Connected){continue;}proxSocket.Send(result, SocketFlags.None);}}}private void button1_Click(object sender, EventArgs e){foreach (var proxSocket in ClientProxClentList){if (proxSocket.Connected){proxSocket.Send(new byte[] { 2 }, SocketFlags.None);}}}}}
客户端
点击按钮连接Server,在外面创建一个socket对象名称为ClientSocket.方便其他地方调用,连接成功后new一个线程名称thread来处理接受到的消息,注意.thread设置为后台线程thread.IsBackground = true,线程开始的时候把当前的socket对象作为参数给它,thread.Start(ClientSocket);
private void btnConnect_Click(object sender, EventArgs e){Socket socket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);ClientSocket = socket;try{socket.Connect(IPAddress.Parse(txtIP.Text), int.Parse(txtPort.Text));}catch (Exception ex){MessageBox.Show("Bad");return;} AppendTextToTxtLog(string.Format("服务端{0}已连接",ClientSocket.RemoteEndPoint.ToString()));Thread thread = new Thread(new ParameterizedThreadStart(ReceiveData));thread.IsBackground = true;thread.Start(ClientSocket);}
消息接受方法ReceiveData(), socket对象.Receive(data, 0, data.Length, SocketFlags.None);返回值是实际接受的字节流长度,变量名readLen,后面要用.
public void ReceiveData(object obj){Socket proxSocket = obj as Socket;byte[] data = new byte[1024 * 1024];while (true){int readLen = 0;try{readLen = proxSocket.Receive(data, 0, data.Length, SocketFlags.None);}catch (Exception){//异常退出时AppendTextToTxtLog(string.Format("服务端{0}非正常退出", proxSocket.RemoteEndPoint.ToString()));StopConnetct();return;}if (readLen <= 0){//客户端正常退出AppendTextToTxtLog(string.Format("服务端:{0}正常退出", proxSocket.RemoteEndPoint.ToString()));StopConnetct();return;//方法结束->终结当前接受客户端数据的异步线程}//接受的数据中第一个字节如果是1,那么是字符串.2是闪屏.3是文件if (data[0]==1){string strMsg = ProcessRecieveString(data, readLen);AppendTextToTxtLog(string.Format("接收到服务端{0}的消息{1}", proxSocket.RemoteEndPoint.ToString(), strMsg));}else if (data[0] == 2){ProcessRecieveShake();}else if (data[0]==3){ProcessRecieveFile(data, readLen);}}}
下面是对字节流首位分别是1,2,3的处理方法
public string ProcessRecieveString(byte[] data,int readLen){string str = Encoding.Default.GetString(data, 1, readLen);return str;}public void ProcessRecieveShake(){Point oldLocation = this.Location;Random r = new Random();if (this.InvokeRequired){txtLog.BeginInvoke(new Action<Point,Random>(Shake),oldLocation,r);}else{Shake(oldLocation, r);} }private void Shake(Point oldLocation, Random r){for (int i = 0; i < 50; i++){this.Location = new Point(r.Next(oldLocation.X - 5, oldLocation.X + 5), r.Next(oldLocation.Y - 5, oldLocation.Y + 5));Thread.Sleep(50);this.Location = oldLocation;}}public void ProcessRecieveFile(byte[] data,int readLen){using (SaveFileDialog sfd = new SaveFileDialog()){sfd.DefaultExt = "txt";sfd.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";if (sfd.ShowDialog(this) != DialogResult.OK){return;}byte[] fileData = new byte[readLen - 1];Buffer.BlockCopy(data, 1, fileData, 0, readLen - 1);File.WriteAllBytes(sfd.FileName, fileData);AppendTextToTxtLog(string.Format("接收到文件,已保存到{0}", sfd.FileName));}}
下面是发送消息的代码(和服务端的基本差不多)
private void btnSend_Click(object sender, EventArgs e){// AppendTextToTxtLog("123");if (ClientSocket==null){return;}if (ClientSocket.Connected){byte[] data = Encoding.Default.GetBytes(txtSendMsg.Text);ClientSocket.Send(data, 0, data.Length, SocketFlags.None);}}
下面是客户端的整体代码
using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.IO;using System.Linq;using ;using .Sockets;using System.Text;using System.Threading;using System.Threading.Tasks;using System.Windows.Forms;namespace SocketClient{public partial class Mianfrm : Form{public Mianfrm(){InitializeComponent();//Control.CheckForIllegalCrossThreadCalls = false;}public Socket ClientSocket { get; set; }private void btnConnect_Click(object sender, EventArgs e){Socket socket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);ClientSocket = socket;try{socket.Connect(IPAddress.Parse(txtIP.Text), int.Parse(txtPort.Text));}catch (Exception ex){MessageBox.Show("Bad");return;} AppendTextToTxtLog(string.Format("服务端{0}已连接",ClientSocket.RemoteEndPoint.ToString()));Thread thread = new Thread(new ParameterizedThreadStart(ReceiveData));thread.IsBackground = true;thread.Start(ClientSocket);}public void ReceiveData(object obj){Socket proxSocket = obj as Socket;byte[] data = new byte[1024 * 1024];while (true){int readLen = 0;try{readLen = proxSocket.Receive(data, 0, data.Length, SocketFlags.None);}catch (Exception){//异常退出时AppendTextToTxtLog(string.Format("服务端{0}非正常退出", proxSocket.RemoteEndPoint.ToString()));StopConnetct();return;}if (readLen <= 0){//客户端正常退出AppendTextToTxtLog(string.Format("服务端:{0}正常退出", proxSocket.RemoteEndPoint.ToString()));StopConnetct();return;//方法结束->终结当前接受客户端数据的异步线程}//接受的数据中第一个字节如果是1,那么是字符串.2是闪屏.3是文件if (data[0]==1){string strMsg = ProcessRecieveString(data, readLen);AppendTextToTxtLog(string.Format("接收到服务端{0}的消息{1}", proxSocket.RemoteEndPoint.ToString(), strMsg));}else if (data[0] == 2){ProcessRecieveShake();}else if (data[0]==3){ProcessRecieveFile(data, readLen);}}}public string ProcessRecieveString(byte[] data,int readLen){string str = Encoding.Default.GetString(data, 1, readLen);return str;}public void ProcessRecieveShake(){Point oldLocation = this.Location;Random r = new Random();if (this.InvokeRequired){txtLog.BeginInvoke(new Action<Point,Random>(Shake),oldLocation,r);}else{Shake(oldLocation, r);} }private void Shake(Point oldLocation, Random r){for (int i = 0; i < 50; i++){this.Location = new Point(r.Next(oldLocation.X - 5, oldLocation.X + 5), r.Next(oldLocation.Y - 5, oldLocation.Y + 5));Thread.Sleep(50);this.Location = oldLocation;}}public void ProcessRecieveFile(byte[] data,int readLen){using (SaveFileDialog sfd = new SaveFileDialog()){sfd.DefaultExt = "txt";sfd.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";if (sfd.ShowDialog(this) != DialogResult.OK){return;}byte[] fileData = new byte[readLen - 1];Buffer.BlockCopy(data, 1, fileData, 0, readLen - 1);File.WriteAllBytes(sfd.FileName, fileData);AppendTextToTxtLog(string.Format("接收到文件,已保存到{0}", sfd.FileName));}}public void AppendTextToTxtLog(string txt){if (txtLog.InvokeRequired){txtLog.BeginInvoke(new Action<string>(s =>{this.txtLog.Text = String.Format("{0}\r\n{1}", s, txtLog.Text);}), txt);}else{this.txtLog.Text = string.Format("{0}\r\n{1}", txt, txtLog.Text);}}private void btnSend_Click(object sender, EventArgs e){// AppendTextToTxtLog("123");if (ClientSocket==null){return;}if (ClientSocket.Connected){byte[] data = Encoding.Default.GetBytes(txtSendMsg.Text);ClientSocket.Send(data, 0, data.Length, SocketFlags.None);}}private void StopConnetct(){try{if (ClientSocket.Connected){ClientSocket.Shutdown(SocketShutdown.Both);ClientSocket.Close(100);}}catch (Exception ex){}}private void Mianfrm_FormClosing(object sender, FormClosingEventArgs e){StopConnetct();}private void Mianfrm_Load(object sender, EventArgs e){AppendTextToTxtLog("请单击连接到服务器");}}}
最后是软件的界面,
