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;

namespace ModbusDemo.VIewModel
{
    
    class SettingsUCViewModel : BindableBase
    {
        //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();
            }
        }

        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)
        {
            _serialPort = serialPort;
            ConnectionCmm = new DelegateCommand(Connection);
            DisConnectionCmm = new DelegateCommand(DisConnection);
            _regionManager = regionManager;
            _eventAggregator = eventAggregator;
        }

        private void DisConnection()
        {
            if (_serialPort.IsOpen)
            {
                _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 = 500;
                //写入超时时间
                _serialPort.WriteTimeout = 500;
                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");

                }
                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;
        }
       

    }
}