TrainCamp_zhangyongpan_Modbus/ModbusDemo/VIewModel/SettingsUCViewModel.cs

using ModbusDemo.Event;
using ModbusDemo.Uitls;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Timers;
using Timer = System.Timers.Timer;
using ModbusDemo.Device;
namespace ModbusDemo.VIewModel
{

    class SettingsUCViewModel : BindableBase
    {
        //
        private ModbusRTU _modbusRTU;
        //定时器
        private readonly Timer _checkTimer;
        //事件聚合器
        private readonly IEventAggregator _eventAggregator;
        //控制页面跳转
        private readonly IRegionManager _regionManager;
        //断开连接的命令
        public DelegateCommand DisConnectionCmm { get; set; }
        //链接窗口的命令
        public DelegateCommand ConnectionCmm { get; set; }

        //获取串口
        private SerialPort _serialPort;
        //设置串口名字
        private string _portName = "COM3";

        public string PortName
        {
            get { return _portName; }
            set
            {
                _portName = value;
                RaisePropertyChanged();
            }
        }

        //设置波特率
        private string _baudRate = "9600";

        public string BaudRate
        {
            get { return _baudRate; }
            set
            {
                _baudRate = value;
                RaisePropertyChanged();
            }
        }

        //设置数据位
        private string _dataBits = "8";

        public string DataBits
        {
            get { return _dataBits; }
            set
            {
                _dataBits = value;

                RaisePropertyChanged();
            }
        }
        //设置校验位
        private Parity _parity = Parity.Even;

        public Parity Parity
        {
            get { return _parity; }
            set
            {
                _parity = value;
                RaisePropertyChanged();
            }
        }

        //设置停止位
        private StopBits _stopBits = StopBits.One;

        public StopBits StopBits
        {
            get { return _stopBits; }
            set
            {
                _stopBits = value;
                RaisePropertyChanged();
            }
        }

        //设置读取和写入时间
        private string _timeOut = "200";

        public string TimeOut
        {
            get { return _timeOut; }
            set
            {
                _timeOut = value;
                RaisePropertyChanged();
            }
        }


        public SettingsUCViewModel()
        {

        }
        /// <summary>
        /// 从容器中获取创建的窗口
        /// </summary>
        /// <param name="serialPort"></param>
        public SettingsUCViewModel(SerialPort serialPort, IRegionManager regionManager, IEventAggregator eventAggregator, ModbusRTU modbusRTU)
        {
            _serialPort = serialPort;
            ConnectionCmm = new DelegateCommand(Connection);
            DisConnectionCmm = new DelegateCommand(DisConnection);
            _regionManager = regionManager;
            _eventAggregator = eventAggregator;
            _modbusRTU = modbusRTU;
            _checkTimer = new Timer(5000); // 每秒检查一次
            _checkTimer.Elapsed += CheckPortStatus;
            _checkTimer.AutoReset = true;

        }
        private void CheckPortStatus(object sender, ElapsedEventArgs e)
        {
            //bool isConnected = SerialPort.GetPortNames().Contains(PortName);
            byte[] bytes = new byte[] { 0x01, 0x01, 0x01, 0x2C, 0x00, 0x01, 0x3D, 0xFF };
            byte[] response = _modbusRTU.SendMessage(bytes);
            if (response ==null) 
            {
                _checkTimer.Stop();
                _serialPort.Close();
                MessageBox.Show("当前连接已经断开");
            }
        }

        private void DisConnection()
        {
            if (_serialPort.IsOpen)
            {
                _checkTimer.Stop();
                _serialPort.Close();

            }
            MessageBox.Show("连接已经断开");
        }

        /// <summary>
        /// 串口参数设置
        /// </summary>
        private void Connection()
        {
            //TODO,做数据的判空处理
            if (!_serialPort.IsOpen)
            {

                _serialPort.PortName = GetComboBoxItemValue(this.PortName);
                _serialPort.BaudRate = int.Parse(GetComboBoxItemValue(this.BaudRate));
                _serialPort.Parity = this.Parity;
                if (this.StopBits == StopBits.None)
                {
                    this.StopBits = StopBits.One;
                    MessageBox.Show("当前设备不支持无停止位(None)模式，已自动切换为 1 个停止位。");
                }
                _serialPort.StopBits = this.StopBits;
                _serialPort.DataBits = int.Parse(GetComboBoxItemValue(this.DataBits));

                //读取超时时间
                _serialPort.ReadTimeout = int.Parse(GetComboBoxItemValue(this.TimeOut));
                //写入超时时间
                _serialPort.WriteTimeout = int.Parse(GetComboBoxItemValue(this.TimeOut));
                try
                {
                    _serialPort.Open();
                    // 发布事件通知其他ViewModel
                    _eventAggregator.GetEvent<SerialPortSettingsChangedEvent>().Publish();
                    MessageBox.Show("串口链接成功");
                    _regionManager.Regions["ModbusRegion"].RequestNavigate("CoilUC");
                    _checkTimer.Start();
                }
                catch (Exception)
                {

                    MessageBox.Show("串口已经链接或者断开，请重新检查在尝试", "warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                }
            }
            else
            {
                MessageBox.Show("当前串口已经连接，请先断开,再连接");
            }

        }
        /// <summary>
        /// 处理下拉框的选择信息
        /// </summary>
        /// <param name="ComboBoxItem"></param>
        /// <returns></returns>
        private string GetComboBoxItemValue(string ComboBoxItem)
        {

            string displayText = ComboBoxItem.ToString();
            string cleanText = displayText.Replace("System.Windows.Controls.ComboBoxItem: ", "");
            return cleanText;
        }


    }
}