C#中Socket通信用法实例详解

本文实例讲述了C#中Socket通信用法。分享给大家供大家参考。具体如下：

一、UDP方式：

服务器端代码:

static void Main(string[] args)
{
 int recv;
 byte[] data = new byte[1024];
 IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);//定义一网络端点
 Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//定义一个Socket
 newsock.Bind(ipep);//Socket与本地的一个终结点相关联
 Console.WriteLine("Waiting for a client..");
 IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);//定义要发送的计算机的地址
 EndPoint Remote = (EndPoint)(sender);//
 recv = newsock.ReceiveFrom(data, ref Remote);//接受数据      
 Console.WriteLine("Message received from{0}:", Remote.ToString());
 Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
 string welcome = "Welcome to my test server!";
 data = Encoding.ASCII.GetBytes(welcome);
 newsock.SendTo(data, data.Length, SocketFlags.None, Remote);
 while (true)
 {
   data = new byte[1024];
   recv = newsock.ReceiveFrom(data, ref Remote);
   Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
   newsock.SendTo(data, recv, SocketFlags.None, Remote);
 }
}

客户端代码:

void MainInfo()
{
 byte[] data = new byte[1024];//定义一个数组用来做数据的缓冲区
 string input, stringData;
 IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.1.21"), 9050);
 Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
 string welcome = "Hello,are you there?";
 data = Encoding.ASCII.GetBytes(welcome);
 server.SendTo(data, data.Length, SocketFlags.None, ipep);//将数据发送到指定的终结点
 IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
 EndPoint Remote = (EndPoint)sender;
 data = new byte[1024];
 int recv = server.ReceiveFrom(data, ref Remote);//接受来自服务器的数据
 Console.WriteLine("Message received from{0}:", Remote.ToString());
 Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
 while (true)//读取数据
 {
   input = richTextBox1.Text;//从键盘读取数据
   if (input == "text")//结束标记
   {
     break;
   }
   server.SendTo(Encoding.ASCII.GetBytes(input), Remote);//将数据发送到指定的终结点Remote
   data = new byte[1024];
   recv = server.ReceiveFrom(data, ref Remote);//从Remote接受数据
   stringData = Encoding.ASCII.GetString(data, 0, recv);
   Console.WriteLine(stringData);
 }
 Console.WriteLine("Stopping client");
 server.Close();
}

二、TCP方式:

服务器端代码:

Socket serverSocket = null;
Thread clientThread = null;
Socket clientSocket = null;
Thread thread = null;
IPAddress ips = null;
PEndPoint ipep = null;
void ServerStart()
{
 ips = Dns.GetHostAddresses(Dns.GetHostName())[0];
 //创建IPEndPoint实例  
 ipep = new IPEndPoint(ips, 9050);
 //创建一个套接字  
 serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 serverSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
 //将所创建的套接字与IPEndPoint绑定  
 serverSocket.Bind(ipep);
 //设置套接字为收听模式  
 serverSocket.Listen(20);
 while (listenalive)
 {
   try
   {
     //在套接字上接收接入的连接  
     clientSocket = serverSocket.Accept();
     clientThread = new Thread(new ParameterizedThreadStart(ReceiveData));
     clientThread.Start(clientSocket);
   }
   catch (Exception ex)
   {
     WriteErrorLog(ex.Message);
     serverSocket.Close();
     serverSocket = null;
   }
 }
}
static void ReceiveData(object obj)
{
 bool keepalive = true;
 Socket s = obj as Socket;
 Byte[] buffer = new Byte[1024];
 //根据收听到的客户端套接字向客户端发送信息  
 IPEndPoint clientep = (IPEndPoint)s.RemoteEndPoint;
 Console.WriteLine("客户端ip:" + clientep.Address + " 端口:" + clientep.Port);
 string welcome = "连接服务器成功";
 buffer = System.Text.Encoding.Unicode.GetBytes(welcome);
 //向客户端发送“连接服务器成功”消息
 s.Send(buffer, buffer.Length, SocketFlags.None);
 buffer = new Byte[1024];
 int bufLen = 0;
 string content = string.Empty;
 while (true)
 {
   //在套接字上接收客户端发送的信息  
   bufLen = 0;
   try
   {
     bufLen = s.Receive(buffer);
     if (bufLen == 0)
     {
       break;
     }
     content += System.Text.Encoding.Unicode.GetString(buffer, 0, bufLen);
   }
   catch (Exception ex)
   {
     break; ;
   }
 }
 Send(s, content);
 s = null;
 buffer = null;
 clientep = null;
 Thread.CurrentThread.Abort();
}

客户端代码:

void Send(string content)
{
 byte[] data = new byte[1024];
 newclient = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);
 ie = new System.Net.IPEndPoint(System.Net.IPAddress.Parse(ipadd), port);//服务器的IP和端口
 try
 {
   //因为客户端只是用来向特定的服务器发送信息，所以不需要绑定本机的IP和端口。不需要监听。
   newclient.Connect(ie);
 }
 catch (System.Net.Sockets.SocketException e)
 {
   Console.WriteLine(e.ToString());
   return;
 }
 int recv = newclient.Receive(data);
 //连接服务器成功
 string stringdata = System.Text.Encoding.Unicode.GetString(data, 0, recv);
 if (stringdata == "连接服务器成功")
 {
   newclient.Send(System.Text.Encoding.Unicode.GetBytes(content));
   newclient.Shutdown(System.Net.Sockets.SocketShutdown.Send);
   data = new byte[1024];
   recv = newclient.Receive(data);
   string result = System.Text.Encoding.Unicode.GetString(data, 0, recv);    
   newclient.Shutdown(System.Net.Sockets.SocketShutdown.Receive);
   newclient.Close();
   MessageBox.Show(result);
 }
 else
 {
   MessageBox.Show("连接服务器失败", "友情提示");
 }
}

希望本文所述对大家的C#程序设计有所帮助。