C#关于简单串口通信的winfrom客户端

UI界面图：

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发送端口配置相关初始化：

   private void Form1_Load(object sender, EventArgs e)
   {
       // 获取当前串口名的数组
       string[] ports = SerialPort.GetPortNames();
       comboBoxCom.Items.AddRange(ports);

       // 初始化数据位下拉框 
       comboBoxDatabit.DropDownStyle = ComboBoxStyle.DropDownList;
       comboBoxDatabit.DataSource = Enum.GetValues(typeof(SerialPortDatabits));
       comboBoxDatabit.DisplayMember = "ToString";
       comboBoxDatabit.SelectedIndex = 0; // 默认选择none

       // 初始化数据位下拉框
       comboBoxBaud.DropDownStyle = ComboBoxStyle.DropDownList;
       // 获取枚举成员的名称数组
       string[] baudRateNames = Enum.GetNames(typeof(SerialPortBaudRates));
       // 创建一个新的字符串数组，包含完整的枚举成员字符串
       string[] baudRateDisplayNames = new string[baudRateNames.Length];
       for (int i = 0; i < baudRateNames.Length; i++)
       {
           SerialPortBaudRates enumValue = (SerialPortBaudRates)Enum.Parse(typeof(SerialPortBaudRates), baudRateNames[i]);
           baudRateDisplayNames[i] = $"{(int)enumValue}";
       }
       // 绑定数据源到下拉框，并设置显示的完整成员名称 
       comboBoxBaud.DataSource = baudRateDisplayNames;
       comboBoxBaud.DisplayMember = "ToString";
       comboBoxBaud.SelectedIndex = 8; // 默认选择9600

       comboBoxBIP.DropDownStyle = ComboBoxStyle.DropDownList;
       comboBoxBIP.DataSource = Enum.GetValues(typeof(Parity));
       comboBoxBIP.DisplayMember = "ToString";
       comboBoxBIP.SelectedIndex = 0; // 默认选择none

       comboBoxStop.DropDownStyle = ComboBoxStyle.DropDownList;
       comboBoxStop.DataSource = Enum.GetValues(typeof(StopBits));
       comboBoxStop.DisplayMember = "ToString";
       comboBoxStop.SelectedIndex = 0; // 默认选择none
   }

打开串口按钮点击事件：

 private void buttonOn_Click(object sender, EventArgs e)
 {
     if (buttonOn.Text == "打开串口")
     {
         try
         {
             serialPort.PortName= comboBoxCom.Text; // 获取选择的串口端口
             if(Enum.TryParse(comboBoxBaud.Text, out SerialPortBaudRates baudRate))
             {
                 serialPort.BaudRate = baudRate;
             }
             if (Enum.TryParse(comboBoxBIP.Text, out Parity parity))
             {
                 serialPort.Parity = parity;
             }
             if (Enum.TryParse(comboBoxDatabit.Text, out SerialPortDatabits databit))
             {
                 serialPort.DataBits = databit;
             }
             if (Enum.TryParse(comboBoxStop.Text, out StopBits stopBit))
             {
                 serialPort.StopBits = stopBit;
             }
             // 设置DataCheck属性为非空值
             serialPort.DataCheck = (data) =>
             {
                 // 编写逻辑来检查数据
                 return data.Count > 0;  // 示例：检查数据列表是否为空
             };
             serialPort.OpenPort();
             if (serialPort.IsOpen)
             {
                 MessageBox.Show("串口已打开");
                 buttonOn.Text = "关闭串口";
             }
             else
             {
                 MessageBox.Show("串口打开失败");
             }
         }
         catch (Exception ex)
         {
             MessageBox.Show("串口打开失败" + ex.ToString(), "警告",
                 MessageBoxButtons.OK, MessageBoxIcon.Error);
         }
     }
     else
     {
         try
         {
             serialPort.ClosePort();
             MessageBox.Show("串口已关闭");
         }
         catch (Exception ex)
         {

         }

         buttonOn.Text = "打开串口";
     }
 }

发送数据按钮点击事件：

     /// <summary>
     /// 发送数据
     /// </summary>
     /// <param name="sender"></param>
     /// <param name="e"></param>
     private void butSending_Click(object sender, EventArgs e)
     {
         string Str = richTextBox1.Text; // 获取发送文本框里的数据
        Str= Str.PadRight(9, ' ');
        var buffer= Encoding.ASCII.GetBytes(Str);
         try
         {
             if (Str.Length > 0)
             {
                 byte[] bytes = Encoding.ASCII.GetBytes(Str);

                
                 //serialPort.WriteData(bytes); // 串口发送数据
                 serialPort.WriteData(bytes ); // 串口发送数据
             }
             
         }
         catch (Exception)
         {

         }

     }