C#，COM口，接收，发送数据

1.COMHelper类

/// <summary>初始化串行端口</summary>private SerialPort _serialPort;

public SerialPort serialPort{get { return _serialPort; }set { _serialPort = value; }}

/// <summary>/// COM口通信构造函数/// </summary>/// <param name="PortID">通信端口</param>/// <param name="baudRate">波特率</param>/// <param name="parity">奇偶校验位</param>/// <param name="dataBits">标准数据位长度</param>/// <param name="stopBits">每个字节的标准停止位数</param>/// <param name="readTimeout">获取或设置读取操作未完成时发生超时之前的毫秒数</param>/// <param name="writeTimeout">获取或设置写入操作未完成时发生超时之前的毫秒数</param>public ComHelper(string PortID, int baudRate, Parity parity = Parity.None, int dataBits = 8, StopBits stopBits = StopBits.One, int readTimeout = 100, int writeTimeout = 100){try{serialPort = new SerialPort();serialPort.PortName = "COM" + PortID;//通信端口serialPort.BaudRate = baudRate;//波特率serialPort.Encoding = Encoding.ASCII;serialPort.Parity = parity;//奇偶校验位serialPort.DataBits = dataBits;//标准数据位长度serialPort.StopBits = stopBits;//每个字节的标准停止位数serialPort.ReadTimeout = readTimeout;//获取或设置读取操作未完成时发生超时之前的毫秒数serialPort.WriteTimeout = writeTimeout;//获取或设置写入操作未完成时发生超时之前的毫秒数}catch (Exception ex) { throw new Exception(ex.Message); }}

/// <summary>/// 打开COM口/// </summary>/// <returns>true 打开成功；false 打开失败；</returns>public bool Open(){try{if (serialPort.IsOpen == false){serialPort.Open();return true;}}catch (Exception ex){LogImpl.Debug(ex.ToString());}return false;}

/// <summary>/// 关闭COM口/// </summary>/// <returns>true 关闭成功；false 关闭失败；</returns>public bool Close(){try{serialPort.Close();return true;}catch{return false;}}

/// <summary>/// 判断端口是否打开/// </summary>/// <returns></returns>public bool IsOpen(){try{return serialPort.IsOpen;}catch { throw; }}

/// <summary>/// 向COM口发送信息/// </summary>/// <param name="sendData">16进制的字节</param>public void WriteData(byte[] sendData){try{if (IsOpen()){Thread.Sleep(5);serialPort.Write(sendData, 0, sendData.Length);}}catch { throw; }}

/// <summary>/// 接收来自COM的信息/// </summary>/// <returns>返回收到信息的数组</returns>public string[] ReceiveDataArray(){

try{Thread.Sleep(5);if (!serialPort.IsOpen) return null;int DataLength = serialPort.BytesToRead;byte[] ds = new byte[DataLength];int bytecount = serialPort.Read(ds, 0, DataLength);return ByteToStringArry(ds);}catch (Exception ex){LogImpl.Debug(""+ex.ToString());throw;}}

/// <summary>/// 把字节型转换成十六进制字符串/// </summary>/// <param name="bytes"></param>/// <returns></returns>public static string[] ByteToStringArry(byte[] bytes){try{string[] strArry = new string[bytes.Length];for (int i = 0; i < bytes.Length; i++){strArry[i] = String.Format("{0:X2} ", bytes[i]).Trim();}return strArry;}catch { throw; }}

/// <summary>/// 清除缓存数据/// </summary>public void ClearDataInBuffer(){try{serialPort.DiscardInBuffer();serialPort.DiscardOutBuffer();}catch { throw; }}

 

/// <summary>/// 注册 数据接收事件，在接收到数据时 触发/// </summary>/// <param name="serialPort_DataReceived"></param>public void AddReceiveEventHanlder(SerialPortDataReceivedDelegate serialPort_DataReceived){try{serialPort.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived);}catch { throw; }}

//接收事件是否有效 true开始接收，false停止接收。默认true

public static bool ReceiveEventFlag = true;/// <summary>/// 接收数据触发，将接收的数据，通过一个定义的数据接收事件，传递出去。/// </summary>/// <param name="sender"></param>/// <param name="e"></param>public void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e){if (ReceiveEventFlag == false){return;}string strReceive = ReceiveDataString();if (!string.IsNullOrEmpty(strReceive)){OnReceiveDataHanlder(new ReceiveEventArgs() { ReceiveData = strReceive });}}

#region 数据接收事件public event EventHandler<ReceiveEventArgs> ReceiveDataHandler;

protected void OnReceiveDataHanlder(ReceiveEventArgs e){EventHandler<ReceiveEventArgs> handler = ReceiveDataHandler;if (handler != null) handler(this, e);}#endregion

 

个helper类，没多少东西，一般也够用了，主要就是，读取，写入。

2.页面或其他地方使用

public ComHelper comHelp;

string PortID = System.Configuration.ConfigurationManager.AppSettings["PeopleAdr"];int baudRate = 9600;int dataBits = 8;System.IO.Ports.StopBits oStopBits = System.IO.Ports.StopBits.One;//无奇偶校验位System.IO.Ports.Parity oParity = System.IO.Ports.Parity.None;int ReadTimeout = 100;int WriteTimeout = -1;comHelp = new ComHelper(PortID, baudRate, oParity, dataBits, oStopBits, ReadTimeout, WriteTimeout);if (!comHelp.IsOpen()) comHelp.Open();

comHelp.AddReceiveEventHanlder(comHelp.serialPort_DataReceived);//将接收到数据，处理数据的方法注册进去comHelp.ReceiveDataHandler += new EventHandler<ReceiveEventArgs>(rds_ReceiveDataHandler);//将传递接收数据的方法注册进去，如果接收到数据，触发事件，自动存串口数据。

public string strComReciveData = "";//从COM口接收到的数据，如果接收到数据，通过事件触发，会自动有值。void rds_ReceiveDataHandler(object sender, ReceiveEventArgs e){try{strComReciveData = e.ReceiveData;Thread.Sleep(200);//清空缓存comHelp.ClearDataInBuffer();}catch (Exception ex){LogImpl.Debug(ex.ToString());Thread.Sleep(200);}}

 

这是写入数据，就简单多了。

byte[] send = new byte[] { 0x7F, 0x02, 0x8F }; comHelp.WriteData(send);

 

水滴石穿。每一点知识或许很小，很简单，但却是成长的必经。共勉。

 

转载于:https://www.cnblogs.com/jiangyunfeng/p/11559877.html

相关资源：c#串口通信程序，包含打开串口，接收数据和发送数据等功能