用以太网通讯读写条码扫描头

把通讯封装成一个类“

该程序的特点有优势：

    传统写法当条码扫描头停机、异常断电、网络异常等，通讯终端后，程序无法正常恢复连接，丢失数据引发故障，我写的程序，无论扫描头断电还是产线重启，都能第一时间重启连接并通讯上，稳定性很好。

     这个也是在一个朋友老程序不断出问题后，找我帮忙，我给重新写的，试用后效果很不过，非常好用，再也没有发生过问题。

     如果您有硬件的通讯访问难点和项目，可以联系我解决，譬如 RS232 485 422 串口通讯、以太网接口的仪器仪表通讯、OPC Server自动化数据PLC访问都可以，欢迎练习我 邮箱： 458978@qq.com  加我QQ 458978 验证填，你从博客园知道我QQ号码的即可！

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets ;
using System.Threading;

namespace CodeReaderClient.ConnectType
{
    /// <summary>
    /// 458978@qq.com
    /// Niewei 苏州 2016-09-10
    /// </summary>
 public    class TCPConnectClass
    {
     /// <summary>
     /// 以太网通讯对象
     /// </summary>
     public  TcpClient MyTcpClient;
     /// <summary>
     /// 数据流操作
     /// </summary>
     public NetworkStream MyNetworkStream;
     /// <summary>
     /// 条码结果
     /// </summary>
     public string BarCodeStr = string.Empty;
     /// <summary>
     /// IP地址
     /// </summary>
     public  string _IPAddressStr = string.Empty;

     /// <summary>
     /// 通讯端口
     /// </summary>
     public int _Port = 8080;
     /// <summary>
     /// 初始化
     /// </summary>
     /// <param name="IPAddressStr"></param>
     /// <param name="Port"></param>
     public TCPConnectClass (string IPAddressStr,int Port)
     {
         _IPAddressStr = IPAddressStr;
         _Port = Port;
         MyTcpClient = new TcpClient();
         Thread Td = new Thread(RunPorcedue);
         Td.IsBackground = true;
         Td.Start();
     }
   

     /// <summary>
     /// 连接检查方法，保持断线重连
     /// </summary>
     public  void Connect()
     {
         try
         {
             if (!MyTcpClient.Connected)
             {
                 IPAddress IPAddress1 = IPAddress.Parse(_IPAddressStr);
                 MyTcpClient = new TcpClient();
                 MyTcpClient.Connect(IPAddress1, _Port);
                 MyNetworkStream = MyTcpClient.GetStream();
             }

             if (MyTcpClient.Connected)
             {
                 MyNetworkStream = MyTcpClient.GetStream();
                 byte[] Buffer = new byte[] { 0x41 };
                 MyNetworkStream.Write(Buffer, 0, 1);
             }

         }
         catch (Exception)
         {
             
         }
     }

     /// <summary>
     /// 循环工作线程
     /// </summary>
     private void  RunPorcedue()
     {

         byte[] Buffer = new byte[128];
         int Count = 0;
         while (true)
         {

             //检查连接//发送心跳包
                 Connect();
                 //解析接收到的数据
                 try
                 {
                     if (MyTcpClient .Available >0)
                     {
                         Buffer = new byte[128];
                         Count = MyNetworkStream.Read(Buffer, 0, Buffer.Length);
                         if (Count > 0)
                         {
                             BarCodeStr = ExplanationByte(Buffer);
                         }
                     }
                 }
                 catch (Exception err)
                 {
                     string a = err.Message;
                 }

                 Thread.Sleep(100);
             
         }
     }

     /// <summary>
     /// 解析来自条码扫描头的字符串
     /// </summary>
     /// <param name="Buffer"></param>
     /// <returns></returns>
   private   string ExplanationByte(byte[] Buffer)
     {
         if (Buffer .Length >0)
         {
             string Value = System.Text.ASCIIEncoding.ASCII.GetString(Buffer, 0, Buffer.Length);
             Value = Value.Replace("
", "");
             Value = Value.Replace("
", "");
             Value = Value.Replace(" ", "");
             return Value;
         }
         else
         {
             return string.Empty;
         }
         
     }
         
    }
}

程序写好了，可以用网络调试助手来调试收发情况！