C# 串口调试开发 例子

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;

namespace SerialPortTry
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        SerialPort sp = new SerialPort();
        bool cxstate = true;


        private void Form1_Load(object sender, EventArgs e)
        {
            
            if (sp.IsOpen)
            {
                sp.Close();
            }
            label7.BackColor = Color.Black;
            comboBox1.SelectedIndex = 0;
            comboBox2.SelectedIndex = 0;
            comboBox3.SelectedIndex = 0;
            comboBox4.SelectedIndex = 0;
            comboBox5.SelectedIndex = 0;
            CheckForIllegalCrossThreadCalls = false;

            
            

        }



        private void button1_Click(object sender, EventArgs e)
        {
            sp.PortName = comboBox1.SelectedItem.ToString();
            sp.BaudRate = Convert.ToInt32(comboBox2.SelectedItem);
            sp.DataBits = Convert.ToInt32(comboBox3.SelectedItem);
            //serialPort1.StopBits = Convert.ToSinglecomboBox4.SelectedItem);
            label6.Text = "您选用的串口是：" sp.PortName;
            if (sp.IsOpen)
            {
                btn_send.Enabled = true;
                button3.Enabled = true;
            }
            else
            {
                btn_send.Enabled = false;
                button3.Enabled = false;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (sp.IsOpen)
            {
                sp.Close();
                btn_send.Enabled = false;
                button3.Enabled = false;
                label7.BackColor = Color.Black;
                label6.Text = "串口已关闭...";
                button2.Text = "打开串口";
            }
            else
            {
                
                sp.Open();
                btn_send.Enabled = true;
                button3.Enabled = true;
                //sp.DtrEnable = true;
                //sp.RtsEnable = true;
                label7.BackColor = Color.Red;
                label6.Text = "串口已打开...";

                button2.Text = "关闭串口";
            }
            
        }
        
        


        private void btn_send_Click(object sender, EventArgs e)
        {
             sp.WriteLine(textBox1.Text);
             label6.Text = "发送成功";
        }

        
        private void button3_Click(object sender, EventArgs e)
        {
            /*//===================================================查询方式1
            if (button3.Text == "开始接收")
             {
                 button3.Text = "停止接收";
                 textBox2.Text = "";
                 while (true)
                 {
                     string msg = sp.ReadLine();
                     textBox2.AppendText("\n"   msg);
                 }

             }
             else
             {
                 button3.Text = "开始接收";
             }
             //===================================================查询方式2
             textBox2.Text = "";
             while(true)
             {
                 if(sp.BytesToRead!=0)
                 break;
             }
             string msg = sp.ReadLine();
             textBox2.AppendText("\n"   msg); 
            
             */
            //=====================================================子线程方式
            Thread thr_cx = new Thread(new ThreadStart(cxReceive));
            
            if (button3.Text == "开始接收")
            {
                cxstate = true;
                while (sp.BytesToRead != 0)
                    {
                        string throwmsg = sp.ReadLine();
                        throwmsg = "";
                    }
                thr_cx.Start();
                button3.Text = "停止接收";
                label6.Text = "正在接收中，请不要关闭串口";
                button2.Enabled = false;
            }
            else
            {
                button3.Text = "开始接收";
                cxstate = false;
                button2.Enabled = true;
                thr_cx.Abort();
                
            }
        }
        public void cxReceive()
        {
            while (cxstate)
            {
                if (sp.BytesToRead != 0)
                {
                    string msg = sp.ReadLine();
                    textBox2.AppendText(msg   "\n");
                }
                else
                {
                }
            }
          
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("确定要退出吗？", "提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning) == DialogResult.Yes)
            {
                Application.ExitThread();
                System.Environment.Exit(0);
            }
        }
        
    }
}