C#的Socket编程小记

UDP协议。

看代码：

服务端：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Net;

using System.Net.Sockets;

namespace UDPServer

{

        class Program

        {

                static void Main(string[] args)

                {

                        int recv;

                        byte[] data = new byte[1024]; 

                        //构建TCP 服务器

                        //得到本机IP，设置TCP端口号                 

                        IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.1.125"), 8001);

                        Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram , ProtocolType.Udp);

                        //绑定网络地址

                        newsock.Bind(ipep);

                        Console.WriteLine("这里是服务器, 主机名是 {0}",Dns.GetHostName());

                        //等待客户机连接

                        Console.WriteLine("等待客户端连接");

                        //得到客户机IP

                        IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);

                        EndPoint Remote = (EndPoint)(sender);

                        recv = newsock.ReceiveFrom(data, ref Remote);//会阻塞

                        Console .WriteLine ("消息来自 {0}: ", Remote.ToString ());

                        Console.WriteLine(Encoding.UTF8.GetString(data, 0, recv));

                        //客户机连接成功后，发送欢迎信息

                        string welcome = "欢迎 ! ";

                        //字符串与字节数组相互转换

                        //data    = Encoding .ASCII .GetBytes(welcome);

                        data = Encoding.UTF8.GetBytes("服务端>>>"+welcome);

                        //发送信息

                        newsock.SendTo(data, data.Length, SocketFlags.None, Remote);

                        while (true)

                        {

                                data =new byte [1024];

                                //发送接受信息

                                recv =newsock.ReceiveFrom(data ,ref Remote);

                                Console.Write("客户端>>>");

                                Console.WriteLine(Encoding.UTF8.GetString(data, 0, recv));

                                //向客户端回复信息

                                newsock.SendTo(data,recv,SocketFlags.None, Remote);

                        }

                }

        }

}

客户端:

namespace UdpClient

                        byte[] data = new byte[1024];

                        string input, stringData;

                        Console.WriteLine("这里是客户端, 主机名是 {0}", Dns.GetHostName());

                        //设置服务端IP，设置TCP端口号

                        //定义网络类型，数据连接类型和网络协议UDP

                        Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

                        string welcome = "你好! ";

                        data = Encoding.UTF8.GetBytes("客户端>>>" + welcome);

                        server.SendTo(data, data.Length, SocketFlags.None, ipep);//向服务端发送数据

                        EndPoint Remote = (EndPoint)sender;

                        data = new byte[1024];

                        //对于不存在的IP地址，加入此行代码后，可以在指定时间内解除阻塞模式限制

                        //server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 100);

                        int recv = server.ReceiveFrom(data, ref Remote);//将数据接收放入缓冲区

                        Console.WriteLine("消息来自服务端 {0}: ", Remote.ToString());

                                input = Console.ReadLine();

                                //如果输入exit则退出

                                if (input == "exit" || input=="quit")

                                        break;

                                //input = "客户端>>>" + input;

                                server.SendTo(Encoding.UTF8.GetBytes(input), Remote);

                                data = new byte[1024];

                                recv = server.ReceiveFrom(data, ref Remote);

                                stringData = Encoding.UTF8.GetString(data, 0, recv);

                                Console.Write("服务端回复>>>");

                                Console.WriteLine(stringData);

                        Console.WriteLine("客户端关闭.");

                        server.Close();

研究一个教程，只做了些改动。

 本文转自 xcf007 51CTO博客，原文链接：http://blog.51cto.com/xcf007/318765，如需转载请自行联系原作者