SerialPort編程(C#)

  微軟代碼：取出原生COM連接埠字串

public static string[] GetPortNames()

{

    RegistryKey localMachine = null;

    RegistryKey key2 = null;

string[] textArray = null;

//這裡有個斷言，判斷該登錄機碼是否存在

    new RegistryPermission(RegistryPermissionAccess.Read, @"HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM").Assert();

    try

    {

        localMachine = Registry.LocalMachine;

        key2 = localMachine.OpenSubKey(@"HARDWARE\DEVICEMAP\SERIALCOMM", false);

        if (key2 != null)

        {

            string[] valueNames = key2.GetValueNames();

            textArray = new string[valueNames.Length];

            for (int i = 0; i < valueNames.Length; i++)

            {

                textArray[i] = (string) key2.GetValue(valueNames[i]);

            }

        }

    }

    finally

    {

        if (localMachine != null)

        {

            localMachine.Close();

        }

        if (key2 != null)

        {

            key2.Close();

        }

        CodeAccessPermission.RevertAssert();

    }

    if (textArray == null)

    {

        textArray = new string[0];

    }

    return textArray;

}

 

 

 

 

VS.NET2005中SerialPort控制項操作詳解(C#)

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 };

        //禁用和啟用程式中各控制項的狀態

        private void EnableControls()

        {

            // 基於串口的開啟與否，設定控制項狀態

            gbPortSettings.Enabled = !ComPort.IsOpen;

            btns.Enabled = btnstop.Enabled = txtSendData.Enabled = btnSend.Enabled = ComPort.IsOpen;

            if (ComPort.IsOpen) btnOpenPort.Text = " 關閉串口";

            else btnOpenPort.Text = " 開啟串口";

        }

        //初始化組件的資料，為串口提供相關參數

        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();

        }

        // 十六進位轉換位元組數組

        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;

        }

        // 位元組數群組轉換十六進位

        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();

        }

        // 顯示資料日誌

        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();

            }));

        }

        // 串口發送方式

        #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

        //發送資料

        private void SendData()

        {

            if (CurrentDataMode == DataMode.Text)

            {

                // 發送使用者的文本到串口

                ComPort.Write(txtSendData.Text);

                // 將使用者的文本顯示到資料視窗

                Log(LogMsgType.Outgoing, txtSendData.Text + "\n");

            }

            else

            {

                try

                {

                    // 轉換使用者十六進位資料到位元組數組

                    byte[] data = HexStringToByteArray(txtSendData.Text);

                    // 發送資料到串口

                    ComPort.Write(data, 0, data.Length);

                    // 將使用者十六進位資料到資料視窗

                    Log(LogMsgType.Outgoing, ByteArrayToHexString(data) + "\n");

                }

                catch (FormatException)

                {

                    // 轉換錯誤

                    Log(LogMsgType.Error, " 十六進位資料有誤: " + 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);

        }

        // 開啟串口

        private void btnOpenPort_Click(object sender, EventArgs e)

        {

            if (ComPort.IsOpen) ComPort.Close();

            else

            {

                // 設定串口參數

                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;

                // 開啟串口

                ComPort.Open();

            }

            // 改變組件狀態

            EnableControls();

            // 如果串口開啟，將焦點放入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;

        }

        // 接收資料

        private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

           

            // 判斷使用者用的是位元組模式還是字元模式

            if (CurrentDataMode == DataMode.Text)

            {

                // 讀取緩衝區的資料

                string data = ComPort.ReadExisting();

                // 顯示讀取的資料到資料視窗

                Log(LogMsgType.Incoming, data + "\n");

            }

            else

            {

                // 擷取位元組長度

                int bytes = ComPort.BytesToRead;

                // 建立位元組數組

                byte[] buffer = new byte[bytes];

                // 讀取緩衝區的資料到數組

                ComPort.Read(buffer, 0, bytes);

                // 顯示讀取的資料到資料視窗

                Log(LogMsgType.Incoming, ByteArrayToHexString(buffer) + "\n");

            }

        }

        //發送資料按鍵

        private void btnSend_Click(object sender, EventArgs e)

        {

            SendData();

        }

        private void lnkAbout_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            (new frmAbout()).ShowDialog(this);

        }

        // 時間組件控制發送資料

        private void timer1_Tick(object sender, EventArgs e)

        {

            SendData();

        }

        // 連續發送資料

        private void button1_Click(object sender, EventArgs e)

        {

            delay.Enabled = true;

            btns.Enabled = !delay.Enabled;

            btnstop.Enabled = delay.Enabled;

        }

        // 停止連續發送資料

        private void button2_Click(object sender, EventArgs e)

        {

            delay.Enabled = false;

            btns.Enabled = !delay.Enabled;

            btnstop.Enabled = delay.Enabled;

        }

    }

}