C#串口通信之基恩士读码器读二维码

【实例简介】

1、C# 串口通信 读二维码 基恩士N-R2控制器 SR-710读码器 功能Demo;

2、依据实际选择COM端口号， 依实际修改读码指令和停止读码指令；

3、读码指令和停止读码指令可在 基恩士的软件AutoID Network Navigator中设置和测试。

【实例截图】

1、文件

2、实例UI：

【核心代码】

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

namespace SerialPortDemo
{
    public partial class FrmSerialPortMain : Form
    {
        public FrmSerialPortMain()
        {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false;
        }

        System.IO.Ports.SerialPort  myCOM;
        bool comHadOpened = false;
        string LasterCode = "";

        private void btnOpenPort_Click(object sender, EventArgs e)
        {
            if (comHadOpened == false)
            {
                try
                {
                    myCOM = new System.IO.Ports.SerialPort();
                    myCOM.PortName = "COM3";
                    myCOM.BaudRate = 115200;  // 波特率
                    myCOM.DataBits = 8;   // 数据位
                    myCOM.Parity = System.IO.Ports.Parity.None;  // 校验位
                    myCOM.StopBits = System.IO.Ports.StopBits.One;  //停止位
                    myCOM.NewLine = "\r\n";
                    myCOM.RtsEnable = true; //启用请求发送信号
                    myCOM.DtrEnable = true; //启用控制终端就续信号
                    myCOM.ReadTimeout = 3000;
                    myCOM.ReceivedBytesThreshold = 1;
                    myCOM.DataReceived = new System.IO.Ports.SerialDataReceivedEventHandler(this.myCom_DataReceived);

                    myCOM.Open();
                    comHadOpened = true;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

        private void btnTriggerOn_Click(object sender, EventArgs e)
        {
            TriggerOn();
        }
      
        private void TriggerOn()
        {
            if (comHadOpened == false)
                return;
            try
            {
                myCOM.WriteLine(this.txtONCommand.Text);
            }
            catch (Exception ex)
            {
               listBox1.Items.Add("[" DateTime.Now.ToString("MM-dd HH:mm:ss") "]  " ex.Message);
                listBox1.SelectedIndex = listBox1.Items.Count - 1;
            }
        }

        private void myCom_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            Thread.Sleep(100);
            byte[] ReDatas = new byte[myCOM.BytesToRead];
            myCOM.Read(ReDatas, 0, ReDatas.Length);//读取数据
            string recdata = new ASCIIEncoding().GetString(ReDatas);
            if (LasterCode!=recdata)
            {
                listBox1.Items.Add("[" DateTime.Now.ToString("MM-dd HH:mm:ss") "]  " recdata);
                listBox1.SelectedIndex = listBox1.Items.Count - 1;
                LasterCode = recdata;
            }
        }

        private void FrmSerialPortMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (myCOM == null)
                return;
            if (myCOM.IsOpen)
            {
                myCOM.Close();
                myCOM.Dispose();
            }
        }

        private void btnClosePort_Click(object sender, EventArgs e)
        {
            if (myCOM == null)
                return;
            if (myCOM.IsOpen)
            {
                myCOM.Close();
                comHadOpened = false;
                myCOM.Dispose();
            }
        }

        private void btnTriggerOFF_Click(object sender, EventArgs e)
        {
            TriggerOFF();
        }

        private void TriggerOFF()
        {
            if (comHadOpened == false)
                return;
            try
            {
                myCOM.WriteLine(this.txtOFFCommand.Text);
            }
            catch (Exception ex)
            {
                listBox1.Items.Add("[" DateTime.Now.ToString("MM-dd HH:mm:ss") "]  " ex.Message);
                listBox1.SelectedIndex = listBox1.Items.Count - 1;
            }
        }
        private void FrmSerialPortMain_Load(object sender, EventArgs e)
        {
            string[] ArryPort = System.IO.Ports.SerialPort.GetPortNames();
            cbSerialPortList.Items.Clear();
            for (int i = 0; i < ArryPort.Length; i )
            {
                cbSerialPortList.Items.Add(ArryPort[i]);
            }
            cbSerialPortList.SelectedIndex = 0;   
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            TriggerOn();
        }

        private void btnStartTimer_Click(object sender, EventArgs e)
        {
            timer1.Enabled = true;
        }

        private void btnStopTimer_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;
        }
    }
}