UDP通信代码,CSharp代码库,德仔网

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【CSharp】 UDP通信
作者:伯钊 / 发布于2015/2/28/ 1078

	using System;
	using System.Collections.Generic;
	using System.Configuration;
	using System.Net;
	using System.Net.Sockets;
	using System.Text;
	using System.Threading;
	namespace LcSoftCard.Service
	{
	 public class UDPConsumeServiceDS
	 {
	 private bool flag;
	 public bool Flag
	 {
	 get { return flag; }
	 set { flag = value; }
	 }
	 private IPEndPoint SendPoint;
	 private const int ConsumeRecCmdBackPort = 9998; //接收命令返回端口--第一路远程主从端口：9998 --PC
	 // --第一路本地主从端口：10000 --消费机 接收命令返回端口
	 private int ConsumeRecDataPort = Convert.ToInt32(ConfigurationManager.ConnectionStrings["FirstLocalPost"].ConnectionString.ToString()); //接收命令返回端口
	 private UdpClient UdpRecCmdBack; //接收发送命令返回数据
	 private Thread ThreadRecCmdBack;
	 private IPEndPoint RecCmdBackPiont;
	 public delegate void ConsumeHandler(string msg); //声明委托
	 public event ConsumeHandler ConsumeEvent; //声明事件
	 public void SendCommand(string cmd, string ip)
	 {
	 string rst = cmd.ToUpper() + AscSum(cmd.ToUpper());
	 SendPoint = new IPEndPoint(IPAddress.Parse(ip), ConsumeRecDataPort);
	 byte[] SendData = Encoding.ASCII.GetBytes(rst);
	 uint IOC_IN = 0x80000000;
	 uint IOC_VENDOR = 0x18000000;
	 uint SIO_UDP_CONNRESET = IOC_IN | IOC_VENDOR | 12;
	 UdpRecCmdBack.Client.IOControl((int)SIO_UDP_CONNRESET, new byte[] { Convert.ToByte(false) }, null);
	 UdpRecCmdBack.Send(SendData, SendData.Length, SendPoint);
	 }
	 /// <summary>
	 /// ASCII求和
	 /// </summary>
	 /// <param name="str"></param>
	 /// <returns></returns>
	 public string AscSum(string str)
	 {
	 int sum = 0;
	 string rst;
	 if (str.Length == 0) return "00";
	 System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
	 for (int i = 0; i < str.Length; i++)
	 {
	 sum += (int)asciiEncoding.GetBytes(str)[i];
	 }
	 sum %= 0x100;
	 rst = sum.ToString("x");
	 if (rst.Length < 2) rst = "0" + rst;
	 return rst.ToUpper();
	 }
	 public void StartRecCmdBackListen()
	 {
	 while (true)
	 {
	 byte[] recData = UdpRecCmdBack.Receive(ref RecCmdBackPiont);
	 string ReadStr = BitConverter.ToString(recData).Replace("-", "");
	 ReadStr = Encoding.ASCII.GetString(recData);
	 Flag = true;
	 if (ConsumeEvent != null)
	 {
	 ConsumeEvent(ReadStr);
	 }
	 }
	 }
	 /// <summary>
	 /// 开启监听线程
	 /// </summary>
	 public void ConsumeRun()
	 {
	 UdpRecCmdBack = new UdpClient(ConsumeRecCmdBackPort);
	 ThreadRecCmdBack = new Thread(new ThreadStart(StartRecCmdBackListen));
	 ThreadRecCmdBack.IsBackground = true;
	 ThreadRecCmdBack.Start();
	 }
	 public void ConsumeStop()
	 {
	 if (ThreadRecCmdBack != null)
	 {
	 ThreadRecCmdBack.Abort();
	 UdpRecCmdBack.Close();
	 }
	 }
	 }
	}
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