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

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            CheckForIllegalCrossThreadCalls = false;
            
            serialPort1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
            serialPort1.Encoding = Encoding.GetEncoding("GB2312");
            System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
        }


        /// /數(shù)據(jù)接收部分
        private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)//接收函數(shù)
          
        {
            try
            {
   
                string recive_data;
                recive_data = serialPort1.ReadExisting();
                recive_data = returnData.ToString();
                textBox1.Text += recive_data;
                textBox1.AppendText("\r\n");
            }
            catch { }
        }

     

        /// //搜索串口部分
        private void button1_Click(object sender, EventArgs e)
        {
            SearchAnAddSerialToComboBox(serialPort1, comboBox1);
        }
        private void SearchAnAddSerialToComboBox(SerialPort MyPort, ComboBox MyBox)//搜索串口函數(shù)
        { //將可用的串口號添加到ComboBox
            string[] NmberOfport = new string[20];//最多容納20個，太多會卡，影響效率
            string MidString1;//中間數(shù)組，用于緩存
            MyBox.Items.Clear();//清空combobox的內(nèi)容
            for (int i = 1; i < 20; i++)
            {
                try //核心是靠try和catch 完成遍歷
                {
                    MidString1 = "COM" + i.ToString();  //把串口名字賦給MidString1
                    MyPort.PortName = MidString1;       //把MidString1賦給 MyPort.PortName 
                    MyPort.Open();                      //如果失敗，后面代碼不執(zhí)行？？
                    NmberOfport[i - 1] = MidString1;    //依次把MidString1的字符賦給NmberOfport
                    MyBox.Items.Add(MidString1);        //打開成功，添加到下列列表
                    MyPort.Close();                     //關閉
                    MyBox.Text = NmberOfport[i - 1];    //顯示最后掃描成功那個串口
                }
                catch { };
            }
        }
  
        /// 打開串口部分
        private void button2_Click(object sender, EventArgs e)
        {
            if (button2.Text == "打開串口")//為0時，表示關閉，此時可以進行打開操作
            {
                try
                {
                    serialPort1.PortName = comboBox1.Text;//獲取端口號
                    serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text);//設置波特率
                    //serialPort1.Parity = Parity.None;
                    //serialPort1.DataBits = 8;
                    //serialPort1.StopBits = StopBits.One;
                    serialPort1.Open();//打開串口
                    

                    button2.Text = " 關閉串口";
                }
                catch
                {
                    MessageBox.Show("串口打開錯誤");
                }
            }
            else  //為1時，表示開啟，此時可以進行關閉操作
            {
                try
                {
                    serialPort1.Close();//關閉串口
                    button2.Text = "打開串口";//置位為0，表示狀態(tài)為關閉
                }
                catch { }
            }
        }
        /// <summary>
        /// /清空顯示部分
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            textBox1.Clear();
        }
    }
}