上位机自动搜索串口，自动匹配波特率

点击按钮，搜索所有串口一一匹配波特率，看是否成功，

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

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }


        SerialPort serialPort = new SerialPort（）;
        int[] Baud_rate = { 9600 115200 };
        int intLenth = 0;
        byte[] data = new byte[500];
        private DeviceType DeviceState { get; set; }
        bool isSuccess = false;


        private void Form1_Load（object sender EventArgs e）
        {
            label3.Text = “就绪“;
            string[] ports = SerialPort.GetPortNames（）;
            for （int i = 0; i < ports.Count（）; i++）
            {
                comboBox1.Items.Add（ports[i].ToString（））;
            }

            comboBox1.SelectedIndex = 0;///默认选择第一个
            comboBox2.Items.Add（Baud_rate[0]）;
            comboBox2.Items.Add（Baud_rate[1]）;
            comboBox2.SelectedIndex = 0;

        }

        private void button1_Click（object sender EventArgs e）
        {
            comboBox1.Items.Clear（）;
            string[] ports = SerialPort.GetPortNames（）;
            for （int i = 0; i < ports.Count（）; i++）
            {
                comboBox1.Items.Add（ports[i].ToString（））;
            }

            comboBox1.SelectedIndex = 0;///默认选择第一个




            if （!serialPort.IsOpen）
            {
                try
                {
                    //serialPort1.BaudRate = 115200;
                    serialPort.StopBits = StopBits.One;//停止位1
                    serialPort.DataBits = 8;//设置数据位
                    serialPort.Parity = Parity.None;
                    //serialPort.Open（）;

                    for （int h = 0; h < Baud_rate.Count（）; h++）
                    {
                        serialPort.BaudRate = Baud_rate[h];
                        for （int f = 0; f < ports.Count（）; f++）
                        {
                            serialPort.PortName = ports[f];
                            comboBox1.SelectedIndex = f;
                            comboBox2.SelectedIndex = h;
                            if （TryRead（serialPort））
                            {
                                isSuccess = true;
                                label3.Text = “连接成功“;

                                comboBox1.Enabled = false;
                                comboBox2.Enabled = false;
                                return;
                            }
                        }
                    }
                    if （!isSuccess）
                    {
                        comboBox1.Enabled = true;
                        comboBox2.Enabled = true;
                        label3.Text = “连接失败！！！心里没点B数吗？

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-01-16 11:22  WindowsFormsApp2\
     目录           0  2019-01-16 11:22  WindowsFormsApp2\.vs\
     目录           0  2019-01-16 11:22  WindowsFormsApp2\.vs\WindowsFormsApp2\
     目录           0  2019-01-16 11:23  WindowsFormsApp2\.vs\WindowsFormsApp2\v15\
     文件       50176  2019-01-17 09:41  WindowsFormsApp2\.vs\WindowsFormsApp2\v15\.suo
     目录           0  2019-01-16 11:23  WindowsFormsApp2\.vs\WindowsFormsApp2\v15\Server\
     目录           0  2019-01-16 11:23  WindowsFormsApp2\.vs\WindowsFormsApp2\v15\Server\sqlite3\
     目录           0  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\
     文件         189  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\App.config
     目录           0  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\bin\
     目录           0  2019-01-16 14:10  WindowsFormsApp2\WindowsFormsApp2\bin\Debug\
     文件       16384  2015-05-26 11:52  WindowsFormsApp2\WindowsFormsApp2\bin\Debug\newProtocolLB.dll
     文件       20480  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\bin\Debug\WindowsFormsApp2.exe
     文件         189  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\bin\Debug\WindowsFormsApp2.exe.config
     文件       58880  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\bin\Debug\WindowsFormsApp2.pdb
     文件        7761  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\Form1.cs
     文件        4938  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\Form1.Designer.cs
     文件        6016  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\Form1.resx
     目录           0  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\obj\
     目录           0  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\
     文件        1443  2019-01-16 19:41  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        7334  2019-01-16 14:08  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     文件           0  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
     文件           0  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
     文件           0  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
     目录           0  2019-01-16 11:22  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\TempPE\
     文件           0  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\WindowsFormsApp2.csproj.CopyComplete
     文件          42  2019-01-16 14:08  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\WindowsFormsApp2.csproj.CoreCompileInputs.cache
     文件        1362  2019-01-16 14:10  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\WindowsFormsApp2.csproj.FileListAbsolute.txt
     文件        1012  2019-01-16 19:48  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\WindowsFormsApp2.csproj.GenerateResource.cache
     文件       46850  2019-01-16 14:09  WindowsFormsApp2\WindowsFormsApp2\obj\Debug\WindowsFormsApp2.csprojAssemblyReference.cache
............此处省略15个文件信息