上一篇有说到TCP通讯，这篇来谈谈UDP通讯方式
基于Udp协议是无连接模式通讯，占用资源少，响应速度快，延时低。至于可靠性，可通过应用层的控制来满足。(不可靠连接)
(1).建立一个套接字(Socket)
(2).绑定服务器端IP地址及端口号--服务器端
(3).通过SendTo()方法向指定主机发送消息(需提供主机IP地址及端口)
(4).通过ReciveFrom()方法接收指定主机发送的消息(需提供主机IP地址及端口)
UDP通讯方式：建立Socket、绑定IP与端口、发送/接收、结束；
通讯实例
UDP服务器端
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net; using System.Net.Sockets; using System.Threading; namespace TcpServerConsoleApp { public class UdpServerApp { UdpClient _udpc;//UDP客服端 public IPEndPoint _Ipdp; public UdpServerApp() { _Ipdp = new IPEndPoint(IPAddress.Parse("192.168.1.142"), 9005); _udpc = new UdpClient(_Ipdp); Thread clientThread = new Thread(ReciveFunc); clientThread.Start(); } private void ReciveFunc() { //_Ipdp = new IPEndPoint(IPAddress.Any, 0); //Console.WriteLine("接入客服端：{0} {1}", _Ipdp.Address.ToString(), _Ipdp.Port.ToString()); while (true) { try { byte[] buffer = _udpc.Receive(ref _Ipdp); Console.WriteLine("接收信息：{0}", Encoding.Default.GetString(buffer)); } catch { } } } public void Sendmsg(string msg) { byte[] buf = Encoding.Default.GetBytes(msg); _udpc.Send(buf, buf.Length, _Ipdp); } } }
DUP客服端
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net; using System.Net.Sockets; using System.Threading; namespace TcpClientConsolApp { public class UdpClientApp { UdpClient _udpc;//UDP客服端 public UdpClientApp() { _udpc = new UdpClient(); Thread clientThread = new Thread(ReciveFunc); clientThread.Start(); } private void ReciveFunc() { IPEndPoint _Ipdp = new IPEndPoint(IPAddress.Any, 0); //Console.WriteLine("接入客服端：{0} {1}", _Ipdp.Address.ToString(), _Ipdp.Port.ToString()); while (true) { try { byte[] buffer = _udpc.Receive(ref _Ipdp); Console.WriteLine("接收信息：{0}", Encoding.Default.GetString(buffer)); } catch { } } } public void Sendmsg(string msg) { IPEndPoint servipdt = new IPEndPoint(IPAddress.Parse("192.168.1.142"), 9005); byte[] buf = Encoding.Default.GetBytes(msg); _udpc.Send(buf, buf.Length, servipdt); } } }
从上面对比可以看出服务端与客服端的代码大致相同。
