关于VS.Net2005中串口操作说明（C#）(SerialPort组件) (转帖)

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;
        }
    }
}