简单的C#串口通信

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;using System.IO;namespace WindowsApplication6 public partial class Formfilerec : Form public Formfilerec() InitializeComponent(); int sentnumber = 0; private SerialPort comm = new SerialPort();/建立一个对象 public delegate void HandleInterfaceUpdataDelegate(string text); private HandleInterfaceUpdataDelegate interfaceUpdataHandle; private void Form1_Load(object sender, EventArgs e) /发送按钮 private void buttonsent_Click(object sender, EventArgs e) byte data = Encoding.Unicode.GetBytes(textBoxsent.Text); string str = Convert.ToBase64String(data); comm.WriteLine(str); sentnumber = sentnumber + textBoxsent.Text.Length; /记录发送数 this.textBox1.Text = Convert.ToString(sentnumber); if (str.Length != 0) /MessageBox.Show(数据发送成功！, 系统提示); textBoxsent.Text = null;/清空 else MessageBox.Show(发送为空。, 系统提示); /打开关闭串口按钮 private void buttonOpenClose_Click(object sender, EventArgs e) /根据当前串口对象，来判断操作 if (comm.IsOpen) comm.Close();/打开时点击，则关闭串口 else /关闭时点击，则设置好端口，波特率等后打开 if(comboBoxComNum.Text.Length!=0) comm.PortName = comboBoxComNum.Text; else MessageBox.Show(请选择串口号！, 系统提示); if(comboBoxBaudRate.Text.Length=0) MessageBox.Show(请选择波特率！, 系统提示); else comm.BaudRate = int.Parse(comboBoxBaudRate.Text); if (comboBoxByteSize.Text.Length = 0) MessageBox.Show(请选择数据位！, 系统提示); else comm.DataBits = int.Parse(comboBoxByteSize.Text); if(comboBoxStopBits.Text=1) comm.StopBits = StopBits.One; else if(comboBoxStopBits.Text=2) comm.StopBits = StopBits.Two; else MessageBox.Show(请选择停止位！, 系统提示); if (comboBoxByteSize.Text.Length != 0 & comboBoxBaudRate.Text.Length!=0 & comboBoxComNum.Text.Length!=0) comm.Open();/打开串口 /设置按钮的状态 buttonOpenClose.Text = comm.IsOpen ? 关闭 : 打开; buttonsent.Enabled = comm.IsOpen; /串口监听 public void comm_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) byte readBuffer = Convert.FromBase64String(comm.ReadLine(); this.Invoke(interfaceUpdataHandle, new string Encoding.Unicode.GetString(readBuffer) ); int m = 0; /记录发送数 m = m + comm.BytesToRead; this.textBox2.Text = Convert.ToString(m); /接收数据 private void UpdateTextBox(string text) textBoxrec.Text += text+rn; private void textBoxsent_TextChanged(object sender, EventArgs e) private void button1_Click(object sender, EventArgs e) interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox); comm.DataReceived += new SerialDataReceivedEventHandler(comm_DataReceived); comm.ReceivedBytesThreshold = 1; button1.Enabled = false; /传输文件 private void buttonfilesent_Click(object sender, EventArgs e) byte sentfile = null; if (comm.IsOpen) string path = E:123.jpg; using (FileStream fs = new FileStream(path, FileMode.Open) /path是文件的路径 sentfile = new bytefs.Length;/定义这个byte数组的长度 为文件的length for (int i = 0; i fs.Length / 100; i+) fs.Read(sentfile, 0, 100); comm.Write(sentfile, 0, 100); /每次向串口发送100个字节，最后再把不足100字节的结尾给发送过去 fs.Read(sentfile, 0, (int)(sentfile.Length % 100); comm.Write(sentfile, 0, (int)(sentfile.Length % 100); MessageBox.Show(文件传送完成, 系统提示); fs.Close(); else MessageBox.Show(请打开串口, 系统提示); /接收文件 private void button3_Click(object sender, EventArgs e) string path2 = E:abc.jpg; byte recfile=new byte100000; int count=comm.BytesToRead; comm.Read(recfile