C# 一个C#串口通信的简单调试工具

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.Collections;

namespace one
{
    /// <summary>
    /// 一个串口的例子
    /// </summary>
    public partial class Form1 : Form
    {
        Form from = new Form();

        private string str = string.Empty;
        private byte[] by;
        public Form1()
        {
            InitializeComponent();
        }
        #region 加载本电脑上的串口
        private void Form1_Load(object sender, EventArgs e)
        {
            button3.Enabled = true;
            button4.Enabled = false;
            comboBox2.Text = "9600";
            string[] portList = System.IO.Ports.SerialPort.GetPortNames();
            for (int i = 0; i < portList.Length; i++)
            {
                comboBox3.Items.Add(portList[i]);
                comboBox1.Items.Add(portList[i]);
                comboBox4_shou.Items.Add(portList[i]);
            }
        }
        #endregion
        /// <summary>
        /// 将信息发送到该Com口
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
                byte[] b = new byte[10];
                b = GEt();
                write();
            //MessageBox.Show(ByteArrayToHexString(Data).ToString());
        }
        #region 写入数据
        public void write() 
        {
            try
            {
                // serialPort1.PortName = comboBox1.Text;
                //serialPort1.Open();
                //serialPort1.BaudRate = int.Parse(comboBox2.Text);
                //声明一个byte的数组来将需要发的信息发到byte 上
                 byte[] Data = new byte[4];
                 Data = Encoding.Unicode.GetBytes(textBox1.Text.Trim());
                // string sr = ByteArrayToHexString(Data);
                //使用缓冲区将数据写入 串行端口
                serialPort1.Write(by, 0, by.Length);
            }
            catch (Exception p)
            {
                Console.WriteLine(p.Message);
                MessageBox.Show(p.Message);
            }
        }
        #endregion
        private void button2_Click(object sender, EventArgs e)
        {
            //read();
            textBox2.Text = "";
        }
        #region 读取串口数据的方法
        public void read() 
        {
            try
            {
                byte[] _data = new byte[4];
                serialPort2.Read(_data,0,_data.Length );
              //  str = Encoding.Unicode.GetString(_data);
                str = ByteArrayToHexString(_data);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        #endregion
        #region 打开串口
        /// <summary>
        /// 打开当前串口
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            try
            {
                serialPort1.PortName = comboBox1.Text;
                serialPort1.BaudRate = 9600;
                if (!serialPort1.IsOpen)
                {
                    serialPort1.Open();
                    button3.Enabled = false;
                    button4.Enabled = true;
                }
                else
                {
                    MessageBox.Show("串口或许被打开或者不存在");
                }
            }
            catch (Exception g)
            {
                Console.WriteLine(g.Message);
                MessageBox.Show(g.Message);
            }
        }
        #endregion 
        #region 关闭串口
        /// <summasry>
        /// 关闭当前串口
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            try
            {
                if (serialPort1.IsOpen)
                {
                    serialPort1.Close();
                    button4.Enabled = false;
                    button3.Enabled = true;
                }
                else 
                {
                    MessageBox.Show("串口或许被关闭或者串口不存在");
                }
            }
            catch (Exception ex) 
            {
                Console.WriteLine(ex);
                MessageBox.Show(ex.Message);
            }
        }
        #endregion
        private void button5_Click(object sender, EventArgs e)
        {
            MessageBox.Show(serialPort1.ReadBufferSize.ToString());
        }
        #region 打开串口
        /// <summary>
        /// 打开接受信息的串口
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button7_Click(object sender, EventArgs e)
        {
            try
            {
                serialPort2.PortName = comboBox4_shou.Text;
                serialPort2.BaudRate = 9600;
                if (!serialPort2.IsOpen)
                {
                    serialPort2.Open();
                    button7.Enabled = false;
                    button6.Enabled = true;                    
                }
                else
                {
                    MessageBox.Show("串口或许被打开或者不存在");
                }
            }
            catch (Exception g)
            {
                Console.WriteLine(g.Message);
                MessageBox.Show(g.Message);
            }
        }
        #endregion
        #region 串口被关闭
        /// <summary>
        /// 关键接受信息的串口
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button6_Click(object sender, EventArgs e)
        {
            try
            {
                if (serialPort2.IsOpen)
                {
                    serialPort2.Close();
                    button6.Enabled = false;
                    button7.Enabled = true;
                }
                else
                {
                    MessageBox.Show("串口或许被关闭或者串口不存在");
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
                MessageBox.Show(ex.Message);
            }
        }
        #endregion
        #region 设置自动发送的代码
        private void timer1_Tick(object sender, EventArgs e)
        {
            if (chek_bok.Checked)
            {
                write();
                send();
            }
            else
            {
                send();
            }
        }
        #endregion
        #region 读取串口数据
        private void serialPort2_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            read();
        }
        #endregion
        #region 发送数据
        /// <summary>
        /// 发送数据
        /// </summary>
        private void send() 
        {
            button8.Text = DateTime.Now.ToString();
            if (str.Length > 0)
            {
                textBox2.Text += " " + str;
                str = "";
            }
            else
            {
                textBox2.ForeColor = Color.Red;

            }
            if (textBox2.Text.Length > 100)
            {
                //textBox2.Clear();
            }
        }
        #endregion
        #region 将字节数据转换为16进制的数据
        /// <summary>
        /// 一个将字节数组转换为16进制的
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        private string ByteArrayToHexString(byte[] data)
        {
            StringBuilder sb = new StringBuilder(data.Length * 3);

            foreach (byte b in data)
            {
                sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
              string s= Convert.ToString(b, 16);
            }
            
            return sb.ToString().ToUpper();
        }
        #endregion 
        /// <summary>
        /// 返回一个byte[] 类型的一个数组
        /// </summary>
        /// <returns>byte类型的数组</returns>
        public byte[] GEt() 
        {
            string s = textBox1.Text.Trim();
            /*拿到那个从文本框输入的文本值
             * 
             * 并且
             */
            if (s.Length<10)
            {
                for (int i = 0; i < 9; i++)
                {
                    if (s.Length==9)
                    {
                        goto GZ;
                    }
                    else
                    {
                        s += 0;
                    }
                }
            }
            GZ:
            List<byte> arr = new List<byte>();
            string a_ = string.Empty;
            for (int i = 0; i < s.Length;i++)
            {
                if (s.Length > 2)
                {
                    a_ = s.Substring(0, 2);
                    s = s.Remove(0, 2);
                    byte a = Convert.ToByte(Convert.ToInt32(a_, 16));
                    arr.Add(a);
                }
                else
                {
                    break;
                }
            }
             by = new byte[4];
             by = arr.ToArray();
             return by;
        }
    }
}