C#基于SerialPort类怎么实现串口通讯

本篇内容主要讲解"C#基于SerialPort类怎么实现串口通讯"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"C#基于SerialPort类怎么实现串口通讯"吧!

最终效果

窗体设置：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.IO.Ports;using System.Threading;using System.Windows.Forms;namespace SerialCommunication{    public partial class Form1 : Form    {        System.Threading.SynchronizationContext m_SyncContext = null;        SerialPort serialPort = null;        ToHexadecimalString toHexadecimalString = new ToHexadecimalString();        public Form1()        {            m_SyncContext = SynchronizationContext.Current;            InitializeComponent();        }        //Data initialization        private void Form1_Load(object sender, EventArgs e)        {            string[] ports = SerialPort.GetPortNames();            SerialPortNumber.Items.AddRange(ports);            SerialPortNumber.SelectedIndex = SerialPortNumber.Items.Count > 0 ? 0 : -1;            BaudRateCom.Text = "9600";  //Set parameters            CheckBitCom.Text = "None";            DataBitCom.Text = "8";            StopBitCom.Text = "One";        }            //Send data         private void Send_Click(object sender, EventArgs e)        {            try            {                //Send data and handle exceptions                byte[] bytes = new byte[SendMessage.Text.Length];                bytes = Encoding.Default.GetBytes(SendMessage.Text);                serialPort.Write(bytes, 0, bytes.Length);            }            catch (Exception error)            {                MessageBox.Show(error.Message);            }        }                // Byte to hexadecimal string         //Clear data        private void Clear_Click(object sender, EventArgs e)        {            ReceiveMessage.Text = "";        }        private void Open_Click(object sender, EventArgs e)        {            string portName = SerialPortNumber.Text;            int buadRate = int.Parse(BaudRateCom.Text);            Parity parity = 0;            switch (CheckBitCom.Text)            {                case "None":                    parity = Parity.None; break;                case "Odd":                    parity = Parity.Odd; break;                case "Even":                    parity = Parity.Even; break;                case "Mark":                    parity = Parity.Mark; break;                case "Space":                    parity = Parity.Space; break;            }            int dataBit = int.Parse(DataBitCom.Text);            StopBits stopBits = 0;            switch (StopBitCom.Text)            {                case "None":                    stopBits = StopBits.None; break;                case "One":                    stopBits = StopBits.One; break;                case "Tow":                    stopBits = StopBits.Two; break;                case "OnePointFive":                    stopBits = StopBits.OnePointFive; break;            }            try            {                if (Open.Text == "Open")                {                    serialPort = new SerialPort(portName, buadRate, parity, dataBit, stopBits);                    serialPort.Open();                    Open.Text = "Close";                }                else if (Open.Text == "Close")                {                    serialPort.Close();                    Open.Text = "Open";                }            }            catch (Exception errror)            {                MessageBox.Show(errror.Message);            }            serialPort.DataReceived += onDataReceived;        }        private void onDataReceived(object sender, SerialDataReceivedEventArgs e)        {            try            {                Byte[] bytes = new byte[serialPort.BytesToRead];                serialPort.Read(bytes, 0, serialPort.BytesToRead);                m_SyncContext.Post(new SendOrPostCallback((obj) =>                {                    ReceiveMessage.AppendText(Encoding.Default.GetString(bytes));                }), bytes);            }            catch (Exception error)            {                MessageBox.Show(error.Message);            }        }    }}

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