C#串口通信源代码

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.Windows.Forms;using System.IO.Ports;using System.Text.RegularExpressions;namespace 串口助手{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } SerialPort sp = new SerialPort(); private void Form1_Load(object sender, EventArgs e) { //获取所有串口名称 string[] serialName = SerialPort.GetPortNames(); foreach (string s in serialName) { //把串口名称添加到Combox cbSerialName.Items.Add(s); } //初始化设置，设置默认值 cbSerialName.SelectedIndex = 0; cbBaudRate.SelectedIndex = 5; cbParity.SelectedIndex = 0; cbStop.SelectedIndex = 0; rb16Send.Select(); rb16Rcv.Checked = true; cbDataBits.SelectedIndex = 3; Control.CheckForIllegalCrossThreadCalls = false; //这个类中我们不检查跨线程的调用是否合法(因为.net 2.0以后加强了安全机制,，不允许在winform中直接跨线程访问控件的属 sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived); } void sp_DataReceived(object sender, SerialDataReceivedEventArgs e) { if (sp.IsOpen) { //输出当前时间 DateTime dt = DateTime.Now; textBoxRcv.Text += dt.GetDateTimeFormats('f')[0].ToString() + '\r\n'; try { Byte[] receivedData = new Byte[sp.BytesToRead]; //创建接收字节数组 sp.Read(receivedData, 0, receivedData.Length); //读取数据,读取到receivedData中的是字符的ASCII码 sp.DiscardInBuffer(); //清空SerialPort控件的Buffer //以字符串显示 if (rbStrRcv.Checked) { string strRcv = null; for (int i = 0; i < receivedData.Length; i++) { strRcv += ((char)Convert.ToInt32(receivedData[i]));//把字节转换成整型，再强转成char } textBoxRcv.Text += strRcv + '\r\n'; //显示信息 } //以16进制显示 if (rb16Rcv.Checked) { string strRcv = null; //int decNum = 0;//存储十进制 for (int i = 0; i < receivedData.Length; i++) { strRcv += receivedData[i].ToString('X2'); //16进制显示 } textBoxRcv.Text += strRcv + '\r\n'; } } catch (System.Exception ex) { MessageBox.Show(ex.Message, '出错提示'); textBoxSend.Text = ''; } } else { MessageBox.Show('请打开某个串口', '错误提示'); } } private void btnOpenSreial_Click(object sender, EventArgs e) //打开串口 按钮 { if (!sp.IsOpen) { try { //串口号 string serialName = cbSerialName.SelectedItem.ToString(); sp.PortName = serialName; sp.BaudRate = Convert.ToInt32(cbBaudRate.Text); //波特率 sp.DataBits = Convert.ToInt32(cbDataBits.Text); //数据位 switch (cbStop.Text) //停止位 { case '1': sp.StopBits = StopBits.One; break; case '1.5': sp.StopBits = StopBits.OnePointFive; break; case '2': sp.StopBits = StopBits.Two; break; default: break; } switch (cbParity.Text) //校验位 { case '无': sp.Parity = Parity.None; break; case '奇校验': sp.Parity = Parity.Odd; break; case '偶校验': sp.Parity = Parity.Even; break; default: break; } if (sp.IsOpen == true) //如果是开着的，先关一下，再开，直接打开可能会出问题 { sp.Close(); } sp.Open(); btnOpenSreial.Text = '关闭串口'; //打开串口之后，把串口配置选项都禁用掉 cbSerialName.Enabled = false; cbBaudRate.Enabled = false; cbDataBits.Enabled = false; cbParity.Enabled = false; cbStop.Enabled = false; } catch (System.Exception ex) { MessageBox.Show('Error:' + ex.Message, 'Error'); return; } } else { //关闭串口 sp.Close(); btnOpenSreial.Text = '打开串口'; //启用配置选项 cbSerialName.Enabled = true; cbStop.Enabled = true; cbParity.Enabled = true; cbDataBits.Enabled = true; cbBaudRate.Enabled = true; } } private void btnExit_Click(object sender, EventArgs e) { Application.Exit(); //退出按钮 } private void btnClearSend_Click(object sender, EventArgs e) { textBoxSend.Text = ''; //清空发送数据文本框 } private void btnClearRcv_Click(object sender, EventArgs e) { textBoxRcv.Text = ''; //清空接收数据文本框 } private void btnSend_Click(object sender, EventArgs e) //发送按钮 { if (!sp.IsOpen) { MessageBox.Show('请先打开串口！！！'); return; } string strSend = textBoxSend.Text; if (rb16Send.Checked) //以16进制格式进行发送 { string strBuf = strSend; string sendnoNull = strBuf.Trim(); //去掉空格 string[] sendArray = strBuf.Split(' '); //以空格分割 byte[] b = new byte[sendArray.Length]; //逐个将字符转为16进制字节数据 for (int i = 0; i < sendArray.Length; i++) { b[i] = Convert.ToByte(sendArray[i], 16); } sp.Write(b, 0, b.Length); } else //以字符串格式发送 { sp.WriteLine(textBoxSend.Text); } } private void textBoxSend_KeyPress(object sender, KeyPressEventArgs e) { if (rb16Send.Checked == true) //以16进制格式发送数据时，只能输入特定字符 { //正则匹配 string patten = '[0-9a-fA-F]|\b|0x|0X| '; //“\b”：退格键 Regex r = new Regex(patten); Match m = r.Match(e.KeyChar.ToString()); if (m.Success)//&&(txtSend.Text.LastIndexOf(' ') != txtSend.Text.Length-1)) { e.Handled = false; } else { e.Handled = true; } } else { e.Handled = false; } } private void Form1_FormClosing(object sender, FormClosingEventArgs e) { sp.Close(); } }}