C#局域网聊天Demo

本demo使用C#编写，采用UDP协议。

分别建立发送、接收线程循环阻塞处理相应任务。

[csharp]
using System;
//using System.Collections.Generic;
//using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace UDPChat
{
    class Program
    {
        static void Main(string[] args)
        {
            //IPAddress[] t = Dns.GetHostAddresses(Dns.GetHostName());//在不同的局域网中获取的数量不一，请调试甄别
            IPAddress ip = Dns.GetHostAddresses(Dns.GetHostName())[0].ToString().Length > 6 ? Dns.GetHostAddresses(Dns.GetHostName())[0] : Dns.GetHostAddresses(Dns.GetHostName())[1];
            IPEndPoint local = new IPEndPoint(ip, 8001);
            bool isAlive = true;

            UdpClient c= new UdpClient(local);

            Thread s = new Thread(() => tSend(ref isAlive, c));//发送线程
            s.Start();
            Thread r = new Thread(() => tRcv(ref isAlive, c));//接受线程
            r.Start();
        }

        static void tSend(ref bool isAlive, UdpClient c)
        {
            string input;
            byte[] send;
            IPEndPoint remote = null;
            bool isAnIp = false;

            while (!isAnIp)
            {
                Console.WriteLine("pls input an ip for this chat.");
                input = Console.ReadLine();
                try
                {
                    remote = new IPEndPoint(IPAddress.Parse(input), 503);
                    isAnIp = true;
                }
                catch
                {
                    Console.WriteLine("it is an invalid ip.\r\n");
                }
            }
            while (isAlive)
            {
                input = Console.ReadLine();
                if (input == "exit")
                    isAlive = false;
                send=Encoding.UTF8.GetBytes(input);
                c.Send(send, send.Length, remote);
                Console.WriteLine();

                Console.WriteLine("{0} sent:{1}", DateTime.Now.ToLocalTime().ToShortTimeString(), input);
            }
            c.Close();
            Console.WriteLine("quit chat.");
            Console.ReadLine();

        }

        static void tRcv(ref bool isAlive, UdpClient c)
        {
            byte[] rcv;
            string receive;
            IPEndPoint remote = new IPEndPoint(IPAddress.Any,0);

            while (isAlive)
            {
                try
                {
                    rcv = c.Receive(ref remote);
                }
                catch
                {
                    break;
                }

                receive=Encoding.UTF8.GetString(rcv);
                if (receive != "exit")
                {
  &n

补充：软件开发 , C# ,