using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Windows.Forms;

namespace UAS_MES_NEW.PublicMethod
{
    /// <summary>
    /// 从串口获取数据
    /// </summary>
    class ReadDataFromSerialPort
    {
        static List<string> OpenPort = new List<string>();

        SerialPort serial = new SerialPort();

        string SerialPort;

        public ReadDataFromSerialPort(string Port)
        {
            if (!OpenPort.Contains(Port))
            {
                try
                {
                    SerialPort = Port;
                    serial.PortName = Port;
                    OpenPort.Add(Port);
                    serial.DataReceived += Serial_DataReceived;
                    serial.Open();
                }
                catch (Exception ex) { MessageBox.Show(ex.Message); }
            }
            else
                MessageBox.Show(Port + "已开启，请勿重复打开");
        }

        private void Serial_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
           
        }

        /// <summary>
        /// 读取串口数据
        /// </summary>
        /// <returns></returns>
        public string Read()
        {
            string Data = "";
            if (serial.IsOpen)
            {
                try
                {
                    Data = serial.ReadLine();
                    serial.DiscardInBuffer();
                }
                catch (Exception e) { MessageBox.Show(e.Message); }
            }
            return Data;
        }

        /// <summary>
        /// 如果打开的串口不为空则进行关闭
        /// </summary>
        public void Close()
        {
            if (serial.IsOpen)
            {
                serial.Close();
                OpenPort.Remove(SerialPort);
            }
        }
    }
}