C# 使用串口编程例子
使用C#调用com控件来与ESP32通信 打发用的IDE是：SharpDevelop 5.1
/*
* 由SharpDevelop创建。
* 用户： xk100
* 日期: 2023/4/7
* 时间: 11:04
*
* 要改变这种模板请点击 工具|选项|代码编写|编辑标准头文件
*/
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.IO.Ports;
namespace w1
{
/// <summary>
/// Description of MainForm.
/// </summary>
public partial class MainForm : Form
{
delegate void addstr(string text);
public MainForm()
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
comboBox1.Items.Clear();
string [] comlist = SerialPort.GetPortNames();
foreach(string port in comlist){
comboBox1.Items.Add(port);
}
if(comlist.Length>0){
comboBox1.SelectedIndex=0;
}
//
// TODO: Add constructor code after the InitializeComponent() call.
//
}
void Button1Click(object sender, EventArgs e)
{
serialPort1.PortName=comboBox1.Text;
serialPort1.Open();
serialPort1.BaudRate=int.Parse(comboBox3.Text);
toolStripStatusLabel2.Text="串口"+serialPort1.PortName+"已打开,波特率："+serialPort1.BaudRate.ToString();
button1.Enabled=false;
button2.Enabled=true;
}
void MainFormLoad(object sender, EventArgs e)
{
}
void ComboBox1SelectedIndexChanged(object sender, EventArgs e)
{
}
void ComboBox1DropDown(object sender, EventArgs e)
{
comboBox1.Items.Clear();
string [] comlist = SerialPort.GetPortNames();
foreach(string port in comlist){
comboBox1.Items.Add(port);
}
}
void Button2Click(object sender, EventArgs e)
{
serialPort1.Close();
toolStripStatusLabel2.Text=serialPort1.PortName+"串口已关闭";
button1.Enabled=true;
button2.Enabled=false;
}
void Button3Click(object sender, EventArgs e)
{
if(serialPort1.IsOpen){
serialPort1.Write(comboBox2.Text+"\r\n");
comboBox2.Items.Add(comboBox2.Text);
comboBox2.Text="";
}else{
MessageBox.Show("串口未打开","错误",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}
void SerialPort1DataReceived(object sender, SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
string indata = sp.ReadExisting();
this.addtext(indata);
}
void addtext(string text){
if(this.textBox1.InvokeRequired){
addstr d=new addstr(addtext);
this.textBox1.Invoke(d,new object[]{text});
}else{
this.textBox1.Text+=text+"\r\n";
this.textBox1.SelectionStart = this.textBox1.Text.Length;
this.textBox1.ScrollToCaret();
}
}
void ListBox1SelectedIndexChanged(object sender, EventArgs e)
{
string cmd=listBox1.Items[listBox1.SelectedIndex].ToString();
if(serialPort1.IsOpen){
serialPort1.Write(cmd+"\r\n");
}else{
MessageBox.Show("串口未打开","错误",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}
}
}
完整的代码下载：
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