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C# 使用串口编程例子

watrt12个月前 (04-11).NET4210

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);
            }
        }
    }
}

QQ截图20230411113801.jpg


完整的代码下载:

w1.zip


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