【发布时间】:2011-07-28 10:21:05
【问题描述】:
我有一个项目,希望我使用 rs232 从秤读取数据。秤的输出格式为“L00000”。我的问题是秤连续发送数据,因为它的重量类似于“L00000,L00001,L00002,L00003,L00004”。我在这种情况下的兴趣是获取要存储在数据库中的最后一部分“L00004”。 这是我的代码: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());
}
}
}
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