关于VS.Net2005中串口操作说明（C#）(SerialPort组件)

本人不太喜欢用文字来描述程序的实现原理的方法，在这里也一样，只用代码来说明问题
下面呢，是我写的串口操作的一段代码，尽供参考

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

namespace SerialPorts
{
public partial class frm_Main : Form
{
#region Public Enumerations
public enum DataMode { Text, Hex }
public enum LogMsgType { Incoming, Outgoing, Normal, Warning, Error };
#endregion
private Color[] LogMsgTypeColor = { Color.Orange, Color.Green, Color.Black, Color.Blue, Color.Red };

//禁用和启用程序中各控件的状态
private void EnableControls()
{
// 基于串口的打开与否，设置控件状态
gbPortSettings.Enabled = !ComPort.IsOpen;
btns.Enabled = btnstop.Enabled = txtSendData.Enabled = btnSend.Enabled = ComPort.IsOpen;

if (ComPort.IsOpen) btnOpenPort.Text = "关闭串口";
else btnOpenPort.Text = "打开串口";
}
//初始化组件的数据，为串口提供相关参数
private void InitializeControlValues()
{
cmbParity.Items.Clear(); cmbParity.Items.AddRange(Enum.GetNames(typeof(Parity)));
cmbStopBits.Items.Clear(); cmbStopBits.Items.AddRange(Enum.GetNames(typeof(StopBits)));

cmbPortName.Items.Clear();
foreach (string s in SerialPort.GetPortNames())
cmbPortName.Items.Add(s);

cmbPortName.Text = cmbPortName.Items[0].ToString();
cmbParity.Text = cmbParity.Items[0].ToString();
cmbStopBits.Text = cmbStopBits.Items[0].ToString();
cmbDataBits.Text = cmbDataBits.Items[0].ToString();
cmbParity.Text = cmbParity.Items[0].ToString();
cmbBaudRate.Text = cmbBaudRate.Items[0].ToString();

EnableControls();
}
//十六进制转换字节数组
private byte[] HexStringToByteArray(string s)
{
s = s.Replace(" ", "");
byte[] buffer = new byte[s.Length / 2];
for (int i = 0; i < s.Length; i += 2)
buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16);
return buffer;
}
//字节数组转换十六进制
private string ByteArrayToHexString(byte[] data)
{
StringBuilder sb = new StringBuilder(data.Length * 3);
foreach (byte b in data)
sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
return sb.ToString().ToUpper();
}
//显示数据日志
private void Log(LogMsgType msgtype, string msg)
{
rtfTerminal.Invoke(new EventHandler(delegate
{
rtfTerminal.SelectedText = string.Empty;
rtfTerminal.SelectionFont = new Font(rtfTerminal.SelectionFont, FontStyle.Bold);
rtfTerminal.SelectionColor = LogMsgTypeColor[(int)msgtype];
rtfTerminal.AppendText(msg);
rtfTerminal.ScrollToCaret();
}));
}
//串口发送方式
#region Local Properties
private DataMode CurrentDataMode
{
get
{
if (rbHex.Checked) return DataMode.Hex;
else return DataMode.Text;
}
set
{
if (value == DataMode.Text) rbText.Checked = true;
else rbHex.Checked = true;
}
}
#endregion
//发送数据
private void SendData()
{
if (CurrentDataMode == DataMode.Text)
{
// 发送用户的文本到串口
ComPort.Write(txtSendData.Text);

// 将用户的文本显示到数据窗口
Log(LogMsgType.Outgoing, txtSendData.Text + "/n");
}
else
{
try
{
// 转换用户十六进制数据到字节数组
byte[] data = HexStringToByteArray(txtSendData.Text);

// 发送数据到串口
ComPort.Write(data, 0, data.Length);

// 将用户十六进制数据到数据窗口
Log(LogMsgType.Outgoing, ByteArrayToHexString(data) + "/n");
}
catch (FormatException)
{
// 转换错误
Log(LogMsgType.Error, "十六进制数据有误: " + txtSendData.Text + "/n");
}
}
txtSendData.SelectAll();
}

/// <summary>
/// -------------------------------------------------------------
/// </summary>
public frm_Main()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
InitializeControlValues();
ComPort.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
}

//打开串口
private void btnOpenPort_Click(object sender, EventArgs e)
{
if (ComPort.IsOpen) ComPort.Close();
else
{
//设置串口参数
ComPort.BaudRate = int.Parse(cmbBaudRate.Text);
ComPort.DataBits = int.Parse(cmbDataBits.Text);
ComPort.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cmbStopBits.Text);
ComPort.Parity = (Parity)Enum.Parse(typeof(Parity), cmbParity.Text);
ComPort.PortName = cmbPortName.Text;

// 打开串口
ComPort.Open();
}

// 改变组件状态
EnableControls();

// 如果串口打开，将焦点放入txtSendData
if (ComPort.IsOpen) txtSendData.Focus();
}

private void rbHex_CheckedChanged(object sender, EventArgs e)
{
if (rbHex.Checked) CurrentDataMode = DataMode.Hex;
}

private void rbText_CheckedChanged(object sender, EventArgs e)
{
if (rbText.Checked) CurrentDataMode = DataMode.Text;
}
//接收数据
private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{

// 判断用户用的是字节模式还是字符模式
if (CurrentDataMode == DataMode.Text)
{
// 读取缓冲区的数据
string data = ComPort.ReadExisting();

// 显示读取的数据到数据窗口
Log(LogMsgType.Incoming, data + "/n");
}
else
{
// 获取字节长度
int bytes = ComPort.BytesToRead;

// 创建字节数组
byte[] buffer = new byte[bytes];

// 读取缓冲区的数据到数组
ComPort.Read(buffer, 0, bytes);

// 显示读取的数据到数据窗口
Log(LogMsgType.Incoming, ByteArrayToHexString(buffer) + "/n");
}
}
//发送数据按键
private void btnSend_Click(object sender, EventArgs e)
{
SendData();
}

private void lnkAbout_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
(new frmAbout()).ShowDialog(this);
}
//时间组件控制发送数据
private void timer1_Tick(object sender, EventArgs e)
{
SendData();
}
//连续发送数据
private void button1_Click(object sender, EventArgs e)
{
delay.Enabled = true;
btns.Enabled = !delay.Enabled;
btnstop.Enabled = delay.Enabled;
}
//停止连续发送数据
private void button2_Click(object sender, EventArgs e)
{
delay.Enabled = false;
btns.Enabled = !delay.Enabled;
btnstop.Enabled = delay.Enabled;
}
}
}