处理从rs232端口获取的缓冲区数据

Question

我有一个项目，在这个项目中，我需要使用rs232从刻度中读取数据。称重的输出格式为"L00000".My问题是称重时，称重为"L00000，L00001，L00002，L00003，L00004“时，称重会不断地发送数据。在这种情况下，我感兴趣的是获得要存储在db中的最后一个部分"L00004“。以下是我的代码:请帮助我改进它。谢谢

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

namespace WindowsFormsApplication5
 {
public partial class Form1 : Form
{
    private List<byte> PortBuffer = new List<byte>();
    SerialPort comPort = new SerialPort("COM3", 9600, Parity.None, 8, StopBits.One);
    public Form1()
    {
        InitializeComponent();

    }

    private void button1_Click(object sender, EventArgs e)
    {


        if (comPort.IsOpen)
        {
            comPort.DiscardOutBuffer();
            MessageBox.Show("Data cleared");
            comPort.Close();
        }

        if(!comPort.IsOpen)
        {
        comPort.Open();
        //sample of data as written by the scale. How can I get the last chunk only so that I format it for my needs
        comPort.Write("L00002 L00002 L00002");

        int bytes = comPort.BytesToRead;
        byte[] buffer = new byte[bytes];
        comPort.Read(buffer, 0, buffer.Length);

        comPort.DataReceived += new SerialDataReceivedEventHandler(data_received);

        comPort.Close();
       }
       }
    public void data_received(object sender,SerialDataReceivedEventArgs e)
    {
        MessageBox.Show("test" + comPort.ReadExisting().ToString());

    }

   }
 }

Answer 1

数据是如何分隔的，空格是a，还是不分隔？

如果是，就像问题中的那样

var data=comPort.ReadExisting().ToString();
var result=data.Split(',').Last();