串口進行操作的類，其中包括寫和讀操作，類可設置串口參數、設置接收函數、打開串口資源、關閉串口資源,操作完成後,一定要關閉串口、接收串口數據事件、接收數據出錯事件、獲取當前全部串口、把字節型轉換成十六進制字符串等功能。這個串口類已經過了調試，可以使用：
using System;
using System.Collections.Generic;
using System.Text;
using System.IO.Ports;
using System.Globalization;
namespace SerialClass
{
public class SerialClass
{
SerialPort _serialPort = null;
//定義委託
public delegate void SerialPortDataReceiveEventArgs(object sender, SerialDataReceivedEventArgs e, byte[] bits);
//定義接收數據事件
public event SerialPortDataReceiveEventArgs DataReceived;
//定義接收錯誤事件
//public event SerialErrorReceivedEventHandler Error;
//接收事件是否有效 false表示有效
public bool ReceiveEventFlag = false;
#region 獲取串口名
private string protName;
public string PortName
{
get { return _serialPort.PortName; }
set
{
_serialPort.PortName = value;
protName = value;
}
}
#endregion
#region 獲取比特率
private int baudRate;
public int BaudRate
{
get { return _serialPort.BaudRate; }
set
{
_serialPort.BaudRate = value;
baudRate = value;
}
}
#endregion
#region 默認構造函數
/// <summary>
/// 默認構造函數，操作COM1，速度爲9600，沒有奇偶校驗，8位字節，停止位爲1 "COM1", 9600, Parity.None, 8, StopBits.One
/// </summary>
public SerialClass()
{
_serialPort = new SerialPort();
}
#endregion
#region 構造函數
/// <summary>
/// 構造函數,
/// </summary>
/// <param name="comPortName"></param>
public SerialClass(string comPortName)
{
_serialPort = new SerialPort(comPortName);
_serialPort.BaudRate = 9600;
_serialPort.Parity = Parity.Even;
_serialPort.DataBits = 8;
_serialPort.StopBits = StopBits.One;
_serialPort.Handshake = Handshake.None;
_serialPort.RtsEnable = true;
_serialPort.ReadTimeout = 2000;
setSerialPort();
}
#endregion
#region 構造函數,可以自定義串口的初始化參數
/// <summary>
/// 構造函數,可以自定義串口的初始化參數
/// </summary>
/// <param name="comPortName">需要操作的COM口名稱</param>
/// <param name="baudRate">COM的速度</param>
/// <param name="parity">奇偶校驗位</param>
/// <param name="dataBits">數據長度</param>
/// <param name="stopBits">停止位</param>
public SerialClass(string comPortName, int baudRate, Parity parity, int dataBits, StopBits stopBits)
{
_serialPort = new SerialPort(comPortName, baudRate, parity, dataBits, stopBits);
_serialPort.RtsEnable = true; //自動請求
_serialPort.ReadTimeout = 3000;//超時
setSerialPort();
}
#endregion
#region 析構函數
/// <summary>
/// 析構函數，關閉串口
/// </summary>
~SerialClass()
{
if (_serialPort.IsOpen)
_serialPort.Close();
}
#endregion
#region 設置串口參數
/// <summary>
/// 設置串口參數
/// </summary>
/// <param name="comPortName">需要操作的COM口名稱</param>
/// <param name="baudRate">COM的速度</param>
/// <param name="dataBits">數據長度</param>
/// <param name="stopBits">停止位</param>
public void setSerialPort(string comPortName, int baudRate, int dataBits, int stopBits )
{
if (_serialPort.IsOpen)
_serialPort.Close();
_serialPort.PortName = comPortName;
_serialPort.BaudRate = baudRate;
_serialPort.Parity = Parity.None;
_serialPort.DataBits = dataBits;
_serialPort.StopBits = (StopBits)stopBits;
_serialPort.Handshake = Handshake.None;
_serialPort.RtsEnable = false;
_serialPort.ReadTimeout = 3000;
_serialPort.NewLine = "/r/n";
setSerialPort();
}
#endregion
#region 設置接收函數
/// <summary>
/// 設置串口資源,還需重載多個設置串口的函數
/// </summary>
void setSerialPort()
{
if (_serialPort != null)
{
//設置觸發DataReceived事件的字節數爲1
_serialPort.ReceivedBytesThreshold = 1;
//接收到一個字節時，也會觸發DataReceived事件
_serialPort.DataReceived += new SerialDataReceivedEventHandler(_serialPort_DataReceived);
//接收數據出錯,觸發事件
_serialPort.ErrorReceived += new SerialErrorReceivedEventHandler(_serialPort_ErrorReceived);
//打開串口
//openPort();
}
}
#endregion
#region 打開串口資源
/// <summary>
/// 打開串口資源
/// <returns>返回bool類型</returns>
/// </summary>
public bool openPort()
{
bool ok = false;
//如果串口是打開的，先關閉
if (_serialPort.IsOpen)
_serialPort.Close();
try
{
//打開串口
_serialPort.Open();
ok = true;
}
catch (Exception Ex)
{
throw Ex;
}
return ok;
}
#endregion
#region 關閉串口
/// <summary>
/// 關閉串口資源,操作完成後,一定要關閉串口
/// </summary>
public void closePort()
{
//如果串口處於打開狀態,則關閉
if (_serialPort.IsOpen)
_serialPort.Close();
}
#endregion
#region 接收串口數據事件
/// <summary>
/// 接收串口數據事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void _serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
//禁止接收事件時直接退出
if (ReceiveEventFlag)
{
return;
}
try
{
System.Threading.Thread.Sleep(20);
byte[] _data = new byte[_serialPort.BytesToRead];
_serialPort.Read(_data, 0, _data.Length);
if (_data.Length == 0) { return; }
if (DataReceived != null)
{
DataReceived(sender, e, _data);
}
//_serialPort.DiscardInBuffer(); //清空接收緩衝區
}
catch (Exception ex)
{
throw ex;
}
}
#endregion
#region 接收數據出錯事件
/// <summary>
/// 接收數據出錯事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void _serialPort_ErrorReceived(object sender, SerialErrorReceivedEventArgs e)
{
}
#endregion
#region 發送數據string類型
public void SendData(string data)
{
//發送數據
//禁止接收事件時直接退出
if (ReceiveEventFlag)
{
return;
}
if (_serialPort.IsOpen)
{
_serialPort.Write(data);
}
}
#endregion
#region 發送數據byte類型
/// <summary>
/// 數據發送
/// </summary>
/// <param name="data">要發送的數據字節</param>
public void SendData(byte[] data, int offset, int count)
{
//禁止接收事件時直接退出
if (ReceiveEventFlag)
{
return;
}
try
{
if (_serialPort.IsOpen)
{
//_serialPort.DiscardInBuffer();//清空接收緩衝區
_serialPort.Write(data, offset, count);
}
}
catch (Exception ex)
{
throw ex;
}
}
#endregion
#region 發送命令
/// <summary>
/// 發送命令
/// </summary>
/// <param name="SendData">發送數據</param>
/// <param name="ReceiveData">接收數據</param>
/// <param name="Overtime">超時時間</param>
/// <returns></returns>
public int SendCommand(byte[] SendData, ref byte[] ReceiveData, int Overtime)
{
if (_serialPort.IsOpen)
{
try
{
ReceiveEventFlag = true; //關閉接收事件
_serialPort.DiscardInBuffer(); //清空接收緩衝區
_serialPort.Write(SendData, 0, SendData.Length);
int num = 0, ret = 0;
System.Threading.Thread.Sleep(10);
ReceiveEventFlag = false; //打開事件
while (num++ < Overtime)
{
if (_serialPort.BytesToRead >= ReceiveData.Length)
break;
System.Threading.Thread.Sleep(10);
}
if (_serialPort.BytesToRead >= ReceiveData.Length)
{
ret = _serialPort.Read(ReceiveData, 0, ReceiveData.Length);
}
else
{
ret = _serialPort.Read(ReceiveData, 0, _serialPort.BytesToRead);
}
ReceiveEventFlag = false; //打開事件
return ret;
}
catch (Exception ex)
{
ReceiveEventFlag = false;
throw ex;
}
}
return -1;
}
#endregion
#region 獲取串口
/// <summary>
/// 獲取所有已連接短信貓設備的串口
/// </summary>
/// <returns></returns>
public string[] serialsIsConnected()
{
List<string> lists = new List<string>();
string[] seriallist = getSerials();
foreach (string s in seriallist)
{
}
return lists.ToArray();
}
#endregion
#region 獲取當前全部串口資源
/// <summary>
/// 獲得當前電腦上的所有串口資源
/// </summary>
/// <returns></returns>
public string[] getSerials()
{
string[] ports = SerialPort.GetPortNames();
Array.Sort(ports);
return ports;
}
#endregion
#region 字節型轉換16
/// <summary>
/// 把字節型轉換成十六進制字符串
/// </summary>
/// <param name="InBytes"></param>
/// <returns></returns>
public static string ByteToString(byte[] InBytes)
{
string StringOut = "";
foreach (byte InByte in InBytes)
{
StringOut = StringOut + String.Format("{0:X2} ", InByte);
}
return StringOut;
}
#endregion
#region 十六進制字符串轉字節型
/// <summary>
/// 把十六進制字符串轉換成字節型(方法1)
/// </summary>
/// <param name="InString"></param>
/// <returns></returns>
public static byte[] StringToByte(string InString)
{
string[] ByteStrings;
ByteStrings = InString.Split(" ".ToCharArray());
byte[] ByteOut;
ByteOut = new byte[ByteStrings.Length];
for (int i = 0; i <= ByteStrings.Length-1 ; i++)
{
//ByteOut[i] = System.Text.Encoding.ASCII.GetBytes(ByteStrings[i]);
ByteOut[i] = Byte.Parse(ByteStrings[i], System.Globalization.NumberStyles.HexNumber);
//ByteOut[i] =Convert.ToByte("0x" + ByteStrings[i]);
}
return ByteOut;
}
#endregion
#region 十六進制字符串轉字節型
/// <summary>
/// 字符串轉16進制字節數組(方法2)
/// </summary>
/// <param name="hexString"></param>
/// <returns></returns>
public static byte[] strToToHexByte(string hexString)
{
hexString = hexString.Replace(" ", "");
if ((hexString.Length % 2) != 0)
hexString += " ";
byte[] returnBytes = new byte[hexString.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
return returnBytes;
}
#endregion
#region 字節型轉十六進制字符串
/// <summary>
/// 字節數組轉16進制字符串
/// </summary>
/// <param name="bytes"></param>
/// <returns></returns>
public static string byteToHexStr(byte[] bytes)
{
string returnStr = "";
if (bytes != null)
{
for (int i = 0; i < bytes.Length; i++)
{
returnStr += bytes[i].ToString("X2");
}
}
return returnStr;
}
#endregion
}
}
======================================================================================
調用方法：
static SerialClass sc = new SerialClass();
static void Main(string[] Args)
{
sc.DataReceived += new SerialClass.SerialPortDataReceiveEventArgs(sc_DataReceived);
sc.writeData("at");
Console.ReadLine();
sc.closePort();
}
static void sc_DataReceived(object sender, SerialDataReceivedEventArgs e, byte[] bits)
{
Console.WriteLine(Encoding.Default.GetString(bits));
}