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C#中Socket通信用法实例详解

2019年07月18日  | 移动技术网IT编程  | 我要评论

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。

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