简易串口助手

自己在学习C#Winform时做过的一个简单的串口助手，功能比较简陋

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;

namespace mySerialAssist
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            for(int i = 50;i < 70;i++)//从串口50-70，此处的串口号按实际需要修改
            {
                string str = i.ToString();
                comboBox1.Items.Add("COM"+str);
            }
            comboBox1.Text = "COM59";//默认COM59
            comboBox2.Text = "115200";//波特率默认115200
            serialPort1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
        }

        private void port_DataReceived(object sender,SerialDataReceivedEventArgs e)
        {
            if (!radioButton3.Checked)//如果接收模式为字符模式
            {
                string str = serialPort1.ReadExisting();//字符串方式读取
                textBox1.AppendText(str);
            }
            else//如果接收模式为数值接收
            {
                byte data = (byte)serialPort1.ReadByte();
                string str = Convert.ToString(data, 16).ToUpper();
                textBox1.AppendText("0x" + (str.Length == 1 ? "0" + str : str) + " ");
            }
        }

        private void button1_Click(object sender, EventArgs e)//打开串口按钮
        {
            try
            {
                serialPort1.PortName = comboBox1.Text;
                serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text,10);
                serialPort1.Open();
                button1.Enabled = false;
                button2.Enabled = true;
            }
            catch
            {
                MessageBox.Show("串口出错,请检查串口", "警告");
            }
        }

        private void button2_Click(object sender, EventArgs e)//关闭串口按钮
        {
            try
            {
                serialPort1.Close();
                button1.Enabled = true;
                button2.Enabled = false;
            }
            catch
            {

            }
        }

        private void button3_Click(object sender, EventArgs e)//发送按钮
        {
            byte[] Data = new byte[1];
            if(serialPort1.IsOpen)
            {          
                if(textBox2.Text != "")
                {
                    if (!radioButton1.Checked)//如果发送模式为数值发送
                    {
                        try
                        {
                            serialPort1.WriteLine(textBox2.Text);
                        }
                        catch
                        {
                            MessageBox.Show("串口写入数据出错", "警告");
                            serialPort1.Close();
                            button1.Enabled = true;
                            button2.Enabled = false;
                        }
                    }
                    else//如果发送模式为字符发送
                    {
                        try
                        {
                            for (int i = 0; i < (textBox2.Text.Length - textBox2.Text.Length % 2) / 2; i++)
                            {
                                Data[0] = Convert.ToByte(textBox2.Text.Substring(i * 2, 2), 16);
                                serialPort1.Write(Data, 0, 1);
                            }
                            if (textBox2.Text.Length % 2 != 0)
                            {
                                Data[0] = Convert.ToByte(textBox2.Text.Substring(textBox2.Text.Length - 1, 1), 16);
                                serialPort1.Write(Data, 0, 1);
                            }
                        }
                        catch
                        {
                            MessageBox.Show("串口写入数据出错", "警告");
                            serialPort1.Close();
                            button1.Enabled = true;
                            button2.Enabled = false;
                        }
                    }
                }
            }
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            if(textBox2.Text != "")//有发送的内容时发送按钮enable
            {
                button3.Enabled = true;
            }
            else
            {
                button3.Enabled = false;
            }
        }

    }
}