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.Runtime.InteropServices;

namespace?Serial_Communicate
{
????public?partial?class?Form1?:?Form
????{
????????int?Received_Data_Cnt?=?0?Transmit_Data_Cnt=0;
????????string?CurrentPortName;

????????[DllImport（“kernel32“）]
????????private?static?extern?long?WritePrivateProfileString（string?section?string?key?string?val?string?filePath）;//系統dll導入ini寫函數
????????[DllImport（“kernel32“）]
????????private?static?extern?int?GetPrivateProfileString（string?section?string?key?string?def?StringBuilder?retVal?int?size?string?filePath）;//系統dll導入ini讀函數
????????string?FileName?=?System.AppDomain.CurrentDomain.baseDirectory?+?“data.ini“;//ini文件名
????????StringBuilder?temp?=?new?StringBuilder（255）;//存儲讀出ini內容變量

????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????????System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls?=?false;
????????????serialPort1.Encoding?=?Encoding.GetEncoding（“GB2312“）;//加入漢字支持
????????}

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{
????????????SearchAndAddSerialToComboBox（serialPort1?comboBox1）;//查找可用串口
????????????comboBox2.Text?=?“115200“;
????????????serialPort1.DataReceived?+=?new?SerialDataReceivedEventHandler（port_DataReceived）;//串口事件處理程序聲明
????????????GetPrivateProfileString（“PortData“?“PortName“?“COM1“?temp?256?FileName）;//讀取ini值，默認是COM1
????????????comboBox1.Text?=?temp.ToString（）;//初始化
????????}

????????private?void?port_DataReceived（object?sender?SerialDataReceivedEventArgs?e）//串口數據接收事件
????????{
????????????Received_Data_Cnt?+=?serialPort1.BytesToRead;//記錄接收字節數

????????????Received_Data_Cnt?=?Received_Data_Cnt?>?9999???9999?:?Received_Data_Cnt;//限幅

????????????label5.Text?=?“RX:“+Received_Data_Cnt.ToString（）;//顯示到lable中

????????????if?（!radioButton3.Checked）//接收模式為接收字符
????????????{
????????????????textBox1.AppendText（serialPort1.ReadExisting（）+“?“）;?//將讀取到的字符串添加到窗口顯示
????????????}
????????????else//接收模式為接收數值
????????????{
????????????????byte[]?data?=?new?byte[serialPort1.BytesToRead];//定義緩沖區，串口事件觸發時有可能收到不止一個字節
????????????????serialPort1.Read（data?0?data.Length）;
????????????????foreach?（byte?Member?in?data）//遍歷用法
????????????????{
????????????????????string?str?=?Convert.ToString（Member16）.ToUpper（）;//轉換為大寫16進制字符串
????????????????????textBox1.AppendText（“0x“?+?（str.Length?==?1???“0“?+?str?:?str）?+?“?“）;
????????????????}
????????????}
????????}

????????private?void?button1_Click（object?sender?EventArgs?e）//打開串口
????????{
????????????if?（!serialPort1.IsOpen）//串口未開
????????????{
????????????????try
????????????????{
????????????????????serialPort1.BaudRate?=?Convert.ToInt32（comboBox2.Text?10）;//串口波特率設置
????????????????????serialPort1.PortName?=?comboBox1.Text;/