c#串口扫码枪输入

串口扫码枪读取主要代码段

 public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        SerialPort sp = new SerialPort("COM1", 115200, Parity.None, 8, StopBits.One);

        delegate void UpdateTextEventHandler(string text);
        UpdateTextEventHandler updateText;

        private void Form1_Load(object sender, System.EventArgs e)
        {
            try
            {
                if (sp.IsOpen)
                {
                    sp.Close();
                }
                sp.Open();
                toolStripStatusLabel3.Text += "Ready";
                toolStripStatusLabel3.ForeColor = System.Drawing.Color.Green;
            }
            catch (Exception)
            {
                toolStripStatusLabel3.Text += "COM1打開失敗";
                toolStripStatusLabel3.ForeColor = System.Drawing.Color.Red;
            }
            

            updateText += new UpdateTextEventHandler(UpdateTextBox);
            sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
        }

                
        private void UpdateTextBox(string text)
        {
            listBox1.Items.Add(text);
        }
        
        private void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            Thread.Sleep(100);

            string readString = sp.ReadExisting();
            this.Invoke(updateText, new string[] { readString }); 
        }
    }