扫码枪实现示例

【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.Tasks;
using System.Windows.Forms;
using thinger.ScannerLib;

namespace 扫码枪串口通讯
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            
            InitializeComponent();

            //通过配置文件拿到串口
            scanner = new Scanner("COM4");

            //绑定
            scanner.ShowMsg = this.ShowMsg;

            //打开串口
            scanner.Connect();
            this.txt_Code.Location=new Point(100,100);
            this.txt_Code.Size = new Size(300, 30);
            this.Controls.Add(this.txt_Code);

            //this.serialPort1.Open();
            this.FormClosing  = MainForm_FormClosing;
        }
        /// <summary>
        // 声明对象
        /// </summary>
        private Scanner scanner;
        private TextBox txt_Code=new TextBox();
        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            //this.serialPort1.Close();
            scanner?.DisConnect();
        }

        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            this.Invoke(new Action(() =>
            {
                //string message = this.serialPort1.ReadExisting();//设置缓冲区，每次扫码不用手动清零
                //this.txt_Code.Text = this.serialPort1.ReadExisting();
            }));
        }
        //委托执行方法体
        private void ShowMsg(string message)
        {
            this.txt_Code.Text = message;
        }
    }
}