using System;using System.Net;using System.Net.Sockets;using System.Text;using System.Threading;namespace ServiceConsoleDemo{    class Program    {        static Socket send;              //Socket建立一个本地通信套接字          static EndPoint receivePoint;    //服务端端口             private static readonly object obj = new object();          static void Main(string[] args)              {            SendFun();             Thread ReceiveThd = new Thread(new ThreadStart(ReceiveFun));            ReceiveThd.Start();            Thread SendScoreThd = new Thread(new ThreadStart(ScoreCmdFun));            SendScoreThd.Start();            Thread SendDeviceThd = new Thread(new ThreadStart(DeviceCmdFun));            SendDeviceThd.Start();        }          static void SendFun()         {            try             {                send = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);                  send.Bind(new IPEndPoint(IPAddress.Parse("192.168.1.52"), 2000));                Console.WriteLine("本地Socket通信已打开...");                receivePoint = new IPEndPoint(IPAddress.Parse("192.168.1.249"),8388);                       }             catch(Exception ex)              {                Console.WriteLine("打开发送命令失败:",ex.Message);              }                 }        static void  ReceiveFun()         {                        lock(obj)            {                while(true)                {                    try                    {                         byte[] buffer = new byte[65535];                                 int length = send.ReceiveFrom(buffer, ref receivePoint);                             string message = Encoding.UTF8.GetString(buffer, 0, length);                        Console.WriteLine(message);                                             }                    catch(Exception ex)                    {                         Console.WriteLine("连接服务端失败：",ex.Message);                      }                }                      }                     }        static void ScoreCmdFun()        {            Thread.Sleep(5000);              send.SendTo(Encoding.UTF8.GetBytes(scoreCmd()), receivePoint);            }        static string scoreCmd()        {            JsonHelper help = new JsonHelper();             help.Reset();            help.version = "0";            help.msgid = "461100725";            help.type = "51";            help.cmd = "7";            return help.ToJson();         }        static void DeviceCmdFun()        {            Thread.Sleep(10000);            send.SendTo(Encoding.UTF8.GetBytes(deviceCmd()), receivePoint);         }        static string deviceCmd()        {            JsonHelper help = new JsonHelper();            help.Reset();             help.version = "0";            help.msgid = "1487326767";            help.type = "1";            help.cmd = "4";            help.AddItem("pageNum", 0);            help.AddItem("rowCount", 50);              help.AddItem("search", "");            return help.ToJson();        }    }  }

需要JsonHelper类，如下

using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ServiceConsoleDemo{    public class JsonHelper    {        //对应JSON的singleInfo成员        protected string _version = string.Empty;        protected string _msgid = string.Empty;        protected string _type = string.Empty;        protected string _cmd = string.Empty;        public System.Collections.ArrayList arrData = new ArrayList();        protected System.Collections.ArrayList arrDataItem = new ArrayList();        public JsonHelper()          {         }        public string version        {            get            {                return _version;            }            set            {                //如设置error，则自动设置success为false                if (value != "") _version = string.Empty;                _version = value;            }        }        public string msgid        {            get            {                return _msgid;            }            set            {                //如设置error，则自动设置success为false                if (value != "") _msgid = string.Empty;                _msgid = value;            }        }        public string type        {            get            {                return _type;            }            set            {                //如设置error，则自动设置success为false                if (value != "") _type = string.Empty;                _type = value;            }        }        public string cmd        {            get            {                return _cmd;            }            set            {                //如设置error，则自动设置success为false                if (value != "") _cmd = string.Empty;                _cmd = value;            }        }        //重置，每次新生成一个json对象时必须执行该方法        public void Reset()        {            _version = string.Empty;            _msgid = string.Empty;            _type = string.Empty;            _cmd = string.Empty;            arrData.Clear();            arrDataItem.Clear();        }        public void AddItem(string name, string value)        {            arrData.Add("\"" + name + "\":" + "\"" + value + "\"");        }        public void AddItem(string name, int value)        {            arrData.Add("\"" + name + "\":" + "" + value + "");        }        public void ItemOk()        {            arrData.Add("
");        }        //序列化JSON对象，得到返回的JSON代码        public string ToJson()        {            StringBuilder sb = new StringBuilder();            sb.Append("{
    ");            sb.Append("\"version\":" + _version.ToString().ToLower() + ",");            sb.Append("\"msgid\":" + "\"" + _msgid.ToString().ToLower() + "\",");            sb.Append("\"type\":" + _type.ToString().ToLower() + ",");            sb.Append("\"cmd\":" + _cmd.ToString().ToLower() + ",");            sb.Append("\"data\":{
    ");            int index = 0;            if (arrData.Count <= 0)            {                sb.Append("}");            }            else            {                foreach (string val in arrData)                {                    index++;                    if (val != "
")                    {                        sb.Append(val + ",");                    }                    else                    {                        sb = sb.Replace(",", "", sb.Length - 1, 1);                        sb.Append("},");                        if (index < arrData.Count)                        {                            sb.Append("{
    ");                        }                    }                }                sb = sb.Replace(",", "", sb.Length - 1, 1);                sb.Append("}");            }            sb.Append("}");            return sb.ToString();        }    }}