【SerialPort】控件的使用实例

来源：互联网发布：淘宝直通车排名规则编辑：程序博客网时间：2024/05/22 18:22
以下是【SerialPort】控件的使用实例，发送端和接收端代码除了端口号（例：“COM9”）不同，其他都一样：
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO.Ports;namespace Test_Serialport_串口控件_{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        SerialPort port1;        string strCom = "COM9";        private delegate void ShowDelegate(string strshow);        private void Form1_Load(object sender, EventArgs e)        {            //我现在用的COM1端口,按需要可改成COM2,COM3            InitCOM(strCom);            OpenPort();            //this.txtReceive.InvokeRequired = true;        }        //初始化SerialPort对象方法.PortName为COM口名称,例如"COM1","COM2"等,注意是string类型        public void InitCOM(string PortName)        {            port1 = new SerialPort(PortName);            port1.BaudRate = 9600;//波特率            port1.Parity = Parity.None;//无奇偶校验位            port1.StopBits = StopBits.Two;//两个停止位            port1.Handshake = Handshake.RequestToSend;//控制协议            port1.ReceivedBytesThreshold = 1;//设置 DataReceived 事件发生前内部输入缓冲区中的字节数            port1.DataReceived += new SerialDataReceivedEventHandler(port1_DataReceived);//DataReceived事件委托        }        //DataReceived事件委托方法        private void port1_DataReceived(object sender, SerialDataReceivedEventArgs e)        {            try            {                StringBuilder currentline = new StringBuilder();                //循环接收数据                while (port1.BytesToRead > 0)                {                    char ch = (char)port1.ReadByte();                    currentline.Append(ch);                }                //在这里对接收到的数据进行处理                ShowTxt(currentline.ToString());                //this.txtReceive.Text = currentline.ToString();                //                currentline = new StringBuilder();            }            catch (Exception ex)            {                Console.WriteLine(ex.Message.ToString());            }        }        public void ShowTxt(string strShow)        {            if (this.txtReceive.InvokeRequired)            {                //   this.txtreceive.BeginInvoke(new ShowDelegate(Show), strshow);//这个也可以                this.txtReceive.Invoke(new ShowDelegate(ShowTxt), strShow);            }            else            {                this.txtReceive.Text = strShow;            }        }        //打开串口的方法        public void OpenPort()        {            try            {                port1.Open();                if (port1.IsOpen)                {                    Console.WriteLine("the port is opened!");                    this.labStat.Text = strCom + " 已连接!";                }                else                {                    Console.WriteLine("failure to open the port!");                    this.labStat.Text = "连接失败!";                }            }            catch { }        }        //关闭串口的方法        public void ClosePort()        {            port1.Close();            if (!port1.IsOpen)            {                Console.WriteLine("the port is already closed!");            }        }        //向串口发送数据        public void SendCommand(string CommandString)        {            byte[] WriteBuffer = Encoding.ASCII.GetBytes(CommandString);            port1.Write(WriteBuffer, 0, WriteBuffer.Length);        }        //调用实例        private void btnSend_Click(object sender, EventArgs e)        {            string str = this.txtSend.Text;            SendCommand(str);        }        private void timer1_Tick(object sender, EventArgs e)        {            labTime.Text = "当前时间是：" + DateTime.Now.ToLongTimeString();        }    }}
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