C#实现UDP通信

ゞ浴缸里的玫瑰 2022-06-07 06:13 228阅读 0赞

参考：[http://www.cnblogs.com/sunev/archive/2012/08/08/2627247.html][http_www.cnblogs.com_sunev_archive_2012_08_08_2627247.html]

原文代码这里贴一份------------------------------------------------------------------>

server:

using System;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
    
    namespace server
    {
        class Program
        {
            static void Main(string[] args)
            {
                int recv;
                byte[] data = new byte[1024];
    
                //得到本机IP，设置TCP端口号         
                IPEndPoint ip = new IPEndPoint(IPAddress.Any, 8001);
                Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
    
                //绑定网络地址
                newsock.Bind(ip);
    
                Console.WriteLine("This is a Server, host name is {0}", Dns.GetHostName());
    
                //等待客户机连接
                Console.WriteLine("Waiting for a client");
    
                //得到客户机IP
                IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
                EndPoint Remote = (EndPoint)(sender);
                recv = newsock.ReceiveFrom(data, ref Remote);
                Console.WriteLine("Message received from {0}: ", Remote.ToString());
                Console.WriteLine(Encoding.UTF8.GetString(data, 0, recv));
    
                //客户机连接成功后，发送信息
                string welcome = "你好 ! ";
    
                //字符串与字节数组相互转换
                data = Encoding.UTF8.GetBytes(welcome);
    
                //发送信息
                newsock.SendTo(data, data.Length, SocketFlags.None, Remote);
    
                while (true)
                {
                    data = new byte[1024];
    
                    //发送接收信息
                    recv = newsock.ReceiveFrom(data, ref Remote);
    
                    Console.WriteLine(Encoding.UTF8.GetString(data, 0, recv));
                    newsock.SendTo(data, recv, SocketFlags.None, Remote);
                }
            }
        }
    }

client:

using System;
    using System.Text;
    using System.Net;
    using System.Net.Sockets;
    
    namespace udptest
    {
        class Program
        {
            static void Main(string[] args)
            {
                byte[] data = new byte[1024];
                string input, stringData;
    
                //构建TCP 服务器
                Console.WriteLine("This is a Client, host name is {0}", Dns.GetHostName());
    
                //设置服务IP，设置TCP端口号
                IPEndPoint ip = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8001);
    
                //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(welcome);
                server.SendTo(data, data.Length, SocketFlags.None, ip);
    
                EndPoint sender = new IPEndPoint(IPAddress.Any, 0);
                data = new byte[1024];
                int recv = 0;
    
                try
                {
                    recv = server.ReceiveFrom(data, ref sender);
                    Console.WriteLine("Message received from {0}: ", sender.ToString());
                    Console.WriteLine(Encoding.UTF8.GetString(data, 0, recv));
                }
                catch (ArgumentNullException e)
                {
                    Console.WriteLine(e.Message);
                }
                catch (SocketException e)
                {
                    Console.WriteLine(e.Message);
                }
                catch (Exception e)
                {
                    Console.WriteLine(e.Message);
                }
    
                while (true)
                {
                    input = Console.ReadLine();
                    if (input == "exit")
                        break;
    
                    server.SendTo(Encoding.UTF8.GetBytes(input), sender);
                    data = new byte[1024];
                    recv = server.ReceiveFrom(data, ref sender);
                    stringData = Encoding.UTF8.GetString(data, 0, recv);
                    Console.WriteLine(stringData);
                }
    
                server.Close();
                Console.WriteLine("Stopping Client.");
                Console.ReadKey();
            }
        }
    }

代码写的不严谨，只是个demo；但是用udp实现了，我们可以干很多事情，比如针对服务器做心跳检测，很多的windows服务器上，

部署心跳程序，都往控制中心的服务器发送各自的状态信息；为什么用udp，不用tcp，因为它**快、一对多**

相关参考：[http://www.cnblogs.com/longzhankunlun/p/6251436.html?utm\_source=itdadao&utm\_medium=referral][http_www.cnblogs.com_longzhankunlun_p_6251436.html_utm_source_itdadao_utm_medium_referral]

[http_www.cnblogs.com_sunev_archive_2012_08_08_2627247.html]: http://www.cnblogs.com/sunev/archive/2012/08/08/2627247.html
[http_www.cnblogs.com_longzhankunlun_p_6251436.html_utm_source_itdadao_utm_medium_referral]: http://www.cnblogs.com/longzhankunlun/p/6251436.html?utm_source=itdadao&utm_medium=referral