c#串口扫码枪输入

串口扫码枪读取主要代码段

 1  public partial class Form1 : Form
 2     {
 3         public Form1()
 4         {
 5             InitializeComponent();
 6         }
 7         SerialPort sp = new SerialPort("COM1", 115200, Parity.None, 8, StopBits.One);
 8 
 9         delegate void UpdateTextEventHandler(string text);
10         UpdateTextEventHandler updateText;
11 
12         private void Form1_Load(object sender, System.EventArgs e)
13         {
14             try
15             {
16                 if (sp.IsOpen)
17                 {
18                     sp.Close();
19                 }
20                 sp.Open();
21                 toolStripStatusLabel3.Text += "Ready";
22                 toolStripStatusLabel3.ForeColor = System.Drawing.Color.Green;
23             }
24             catch (Exception)
25             {
26                 toolStripStatusLabel3.Text += "COM1打開失敗";
27                 toolStripStatusLabel3.ForeColor = System.Drawing.Color.Red;
28             }
29             
30 
31             updateText += new UpdateTextEventHandler(UpdateTextBox);
32             sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
33         }
34 
35                 
36         private void UpdateTextBox(string text)
37         {
38             listBox1.Items.Add(text);
39         }
40         
41         private void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
42         {
43             Thread.Sleep(100);
44 
45             string readString = sp.ReadExisting();
46             this.Invoke(updateText, new string[] { readString }); 
47         }
48     }