基于C#实现与新大陆扫码枪通信

　　　随着工业互联的发展，扫码枪在很多场合都有所应用，超市、商场以及一些智能工厂。今天主要讲如何通过C#实现与新大陆扫码枪（OY10）进行通信，对于扫码枪的配置，这里就不多说了，结合说明书就可以实现。这里值得注意的是，如果安装驱动后，电脑设备管理器中看不到COM口，可能需要扫一个条形码来设置一下，具体参考说明书通讯配置章节。

　　　首先贴下界面，基于Winform开发，主要就是正常的串口通信，涉及的技术包括UI界面设计+串口通信知识+参数配置处理+委托更新界面，涵盖了一个小系统必备的一些知识。

　　　　

　　　　再来贴一些源码，首先贴个核心串口类的编写：

 using System;
 using System.Collections.Generic;
 using System.IO.Ports;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace NewLand
 {
     public delegate void ShowMsgDelegate(string info);

     public class NewLandSerial
     {

         //定义串口类对象
         private SerialPort MyCom;
         //定义接收字节数组
         byte[] bData = new byte[];
         byte mReceiveByte;
         int mReceiveByteCount = ;
         public ShowMsgDelegate myShowInfo;

         public NewLandSerial()
         {
             MyCom = new SerialPort();

         }

         #region 打开关闭串口方法
         /// <summary>
         /// 打开串口方法【9600 N 8 1】
         /// </summary>
         /// <param name="iBaudRate">波特率</param>
         /// <param name="iPortNo">端口号</param>
         /// <param name="iDataBits">数据位</param>
         /// <param name="iParity">校验位</param>
         /// <param name="iStopBits">停止位</param>
         /// <returns></returns>
         public bool OpenMyComm(int iBaudRate, string iPortNo, int iDataBits, Parity iParity, StopBits iStopBits)
         {
             try
             {
                 //关闭已打开串口
                 if (MyCom.IsOpen)
                 {
                     MyCom.Close();
                 }
                 //设置串口属性
                 MyCom.BaudRate = iBaudRate;
                 MyCom.PortName = iPortNo;
                 MyCom.DataBits = iDataBits;
                 MyCom.Parity = iParity;
                 MyCom.StopBits = iStopBits;
                 MyCom.ReceivedBytesThreshold = ;
                 MyCom.DataReceived += MyCom_DataReceived;

                 MyCom.Open();
                 return true;
             }
             catch
             {
                 return false;
             }
         }

         private void MyCom_DataReceived(object sender, SerialDataReceivedEventArgs e)
         {
             mReceiveByteCount = ;
             while (MyCom.BytesToRead > )
             {
                 mReceiveByte = (byte)MyCom.ReadByte();
                 bData[mReceiveByteCount] = mReceiveByte;
                 mReceiveByteCount += ;
                 if (mReceiveByteCount >= )
                 {
                     mReceiveByteCount = ;
                     //清除输入缓存区
                     MyCom.DiscardInBuffer();
                     return;
                 }
             }
             if (mReceiveByteCount > )
             {
                 myShowInfo(Encoding.ASCII.GetString(GetByteArray(bData, , mReceiveByteCount)));
             }

         }

         /// <summary>
         /// 自定义截取字节数组
         /// </summary>
         /// <param name="byteArr"></param>
         /// <param name="start"></param>
         /// <param name="length"></param>
         /// <returns></returns>
         private byte[] GetByteArray(byte[] byteArr, int start, int length)
         {
             byte[] Res = new byte[length];
             if (byteArr != null && byteArr.Length >= length)
             {
                 for (int i = ; i < length; i++)
                 {
                     Res[i] = byteArr[i + start];
                 }

             }
             return Res;
         }

         /// <summary>
         /// 关闭串口方法
         /// </summary>
         /// <returns></returns>
         public bool ClosePort()
         {
             if (MyCom.IsOpen)
             {
                 MyCom.Close();
                 return true;
             }
             else
             {
                 return false;
             }

         }
         #endregion

     }
 }

NewLandSerial

　　　　再者就是界面的调用，直接看代码：

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Configuration;
 using System.Data;
 using System.Drawing;
 using System.IO.Ports;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;

 namespace NewLand
 {
     public partial class FrmMain : Form
     {
         public FrmMain()
         {
             InitializeComponent();
             this.Load += FrmMain_Load;

         }

         private void FrmMain_Load(object sender, EventArgs e)
         {
             this.btn_DisConn.Enabled = false;
         }

         private void txt_Info_DoubleClick(object sender, EventArgs e)
         {
             this.txt_Info.Clear();
         }

         NewLandSerial myNewLand;

         private void btn_Connect_Click(object sender, EventArgs e)
         {
            string Port= ConfigurationManager.AppSettings["Port"].ToString();

             myNewLand = new NewLandSerial();
             myNewLand.myShowInfo += ShowInfo;

             if (myNewLand.OpenMyComm(, Port, , Parity.None, StopBits.One))
             {
                 MessageBox.Show("连接成功！", "建立连接");
                 this.btn_Connect.Enabled = false;
                 this.btn_DisConn.Enabled = true;
             }
             else
             {
                 MessageBox.Show("连接失败！", "建立连接");
             }
         }

         private void ShowInfo(string info)
         {
             Invoke(new Action(() =>
             {
                 this.txt_Info.AppendText(DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss") + "   " + info + Environment.NewLine);
             }));
         }

         private void btn_DisConn_Click(object sender, EventArgs e)
         {
             if (myNewLand.ClosePort())
             {
                 MessageBox.Show("断开连接成功！", "断开连接");
                 this.btn_Connect.Enabled = true;
                 this.btn_DisConn.Enabled = false;
             }
             else
             {
                 MessageBox.Show("断开连接失败！", "断开连接");
             }
         }

         private void btn_ParaSet_Click(object sender, EventArgs e)
         {
             new FrmParaSet().ShowDialog();
         }
     }
 }

FrmMain

　　　　最后是参数配置，通过App.Config实现：

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Configuration;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;

 namespace NewLand
 {
     public partial class FrmParaSet : Form
     {
         public FrmParaSet()
         {
             InitializeComponent();
             this.Load += FrmParaSet_Load;
         }

         private void FrmParaSet_Load(object sender, EventArgs e)
         {
             for (int i = ; i < ; i++)
             {
                 this.cmb_Port.Items.Add("COM" + i.ToString());
             }

             this.cmb_Port.Text = ConfigurationManager.AppSettings["Port"].ToString();
         }

         private void btn_Set_Click(object sender, EventArgs e)
         {
             Configuration cfa = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); //首先打开配置文件
             cfa.AppSettings.Settings["Port"].Value = this.cmb_Port.Text;
             cfa.Save();  //保存配置文件
             ConfigurationManager.RefreshSection("appSettings");  //刷新配置文件
             this.Close();
         }
     }
 }

FrmParamSet

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