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C#实现UDP广播
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向255.255.255.255發送UPD數據包即為UDP廣播，接收端只需綁定UDP廣播的端口號即可得到數據
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using?System;??using?System.Collections.Generic;??using?System.Linq;??using?System.Text;??using?System.Net;??using?System.Net.Sockets;??using?System.Threading;????namespace?Test??{??????class?Program??????{??????????static?void?Main(string[]?args)??????????{??????????????UdpClient?client?=?new?UdpClient(new?IPEndPoint(IPAddress.Any,?0));??????????????IPEndPoint?endpoint?=?new?IPEndPoint(IPAddress.Parse("255.255.255.255"),?7788);??????????????byte[]?buf?=?Encoding.Default.GetBytes("Hello?from?UDP?broadcast");??????????????Thread?t?=?new?Thread(new?ThreadStart(RecvThread));??????????????t.IsBackground?=?true;??????????????t.Start();??????????????while?(true)??????????????{??????????????????client.Send(buf,?buf.Length,?endpoint);??????????????????Thread.Sleep(1000);??????????????}??????????}????????????static?void?RecvThread()??????????{??????????????UdpClient?client?=?new?UdpClient(new?IPEndPoint(IPAddress.Any,?7788));??????????????IPEndPoint?endpoint?=?new?IPEndPoint(IPAddress.Any,?0);??????????????while?(true)??????????????{??????????????????byte[]?buf?=?client.Receive(ref?endpoint);??????????????????string?msg?=?Encoding.Default.GetString(buf);??????????????????Console.WriteLine(msg);??????????????}??????????}??????}??}??
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