TrainCamp_zhangyongpan_Modbus/ModbusDemo/VIewModel/RegisterUCViewModel.cs

using ModbusDemo.Device;
using ModbusDemo.Event;
using ModbusDemo.Model;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
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 RegisterUCViewModel : BindableBase
    {
        //事件聚合器
        private readonly IEventAggregator _eventAggregator;
        //定义数据库操作类
        private ModbusDbContext _modbusDbContext;
        //获取读线圈的类
        private IModbusRTU _modbusRTU;
        //定义读线圈的命令
        public DelegateCommand ReadRegisterCmm { get; set; }
        //定义写线圈操作
        public DelegateCommand WriteRegisterCmm { get; set; }
        //获取当前使用的串口
        private SerialPort _serialPort;

        //按钮是否可以点击
        private bool _isEnable;

        public bool IsEnable
        {
            get { return _isEnable; }
            set
            {
                _isEnable = value;
                RaisePropertyChanged();
            }
        }

        //显示当前链接串口的信息
        public string SerialPortInfo
        {
            get
            {
                return "当前为读写寄存器：" + "串口号：" + _serialPort.PortName + "，波特率：" + _serialPort.BaudRate
                    + "，数据位：" + _serialPort.DataBits + "，校验位：" + _serialPort.Parity + "，停止位：" + _serialPort.StopBits;
            }

        }
        #region 读取定义

        //读取的从站id
        private string _slaveAddress;

        public string SlaveAddress
        {
            get { return _slaveAddress; }
            set
            {
                _slaveAddress = value;
                RaisePropertyChanged();
            }
        }
        //读取的起始地址
        private string _startAddress;


        public string StartAddress
        {
            get { return _startAddress; }
            set
            {
                _startAddress = value;
                RaisePropertyChanged();
            }
        }
        //读取的位数
        private string _numberOfPoints;


        public string NumberOfPoints
        {
            get { return _numberOfPoints; }
            set
            {
                _numberOfPoints = value;
                RaisePropertyChanged();
            }
        }

        private string _readResult;

        //读取的结果
        public string ReadResult
        {
            get { return _readResult; }
            set
            {
                _readResult = value;
                RaisePropertyChanged();
            }
        }
        #endregion

        #region 写入定义

        //写入的从站id
        private string _writeslaveAddress;

        public string WriteSlaveAddress
        {
            get { return _writeslaveAddress; }
            set
            {
                _writeslaveAddress = value;
                RaisePropertyChanged();
            }
        }
        //写入的起始地址
        private string _writestartAddress;


        public string WriteStartAddress
        {
            get { return _writestartAddress; }
            set
            {
                _writestartAddress = value;
                RaisePropertyChanged();
            }
        }
        //写入的数据
        private string _writeData;


        public string WriteData
        {
            get { return _writeData; }
            set
            {
                _writeData = value;
                RaisePropertyChanged();
            }
        }


        #endregion

        private List<ModbusLog> _modbusLogList;

        public List<ModbusLog> ModbusLogList
        {
            get { return _modbusLogList; }
            set
            {
                _modbusLogList = value;
                RaisePropertyChanged();
            }
        }

        public RegisterUCViewModel()
        {

        }
        public RegisterUCViewModel(SerialPort serialPort, ModbusRTU modbusRTU, ModbusDbContext modbusDbContext, IEventAggregator eventAggregator)
        {
            _serialPort = serialPort;
            ReadRegisterCmm = new DelegateCommand(ReadRegister);
            _modbusRTU = modbusRTU;
            WriteRegisterCmm = new DelegateCommand(WriteRegister);
            _modbusDbContext = modbusDbContext;
            _eventAggregator = eventAggregator;
            // 订阅事件（使用弱引用，避免内存泄漏）
            _eventAggregator.GetEvent<SerialPortSettingsChangedEvent>().Subscribe(
                OnSerialPortSettingsChanged,
                ThreadOption.UIThread,  // 在UI线程执行回调
                false);// 不使用强引用
            ModbusLogList = GetOperateRegister();

            IsEnable = true;
        }
        // 事件回调方法：当串口设置变更时触发
        private void OnSerialPortSettingsChanged()
        {
            // 强制刷新SerialPortInfo属性，触发UI更新
            RaisePropertyChanged(nameof(SerialPortInfo));
        }



        /// <summary>
        /// 线圈读取操作
        /// </summary>
        private void ReadRegister()
        {
            //将按钮设置为不可点击状态，并解析用户输入的信息
            IsEnable = false;
            if (!byte.TryParse(SlaveAddress, out byte slaveAddressValue))
            {
                MessageBox.Show("SlaveAddress 格式无效", "warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                IsEnable = true;
                return;
            }

            if (!ushort.TryParse(StartAddress, out ushort startAddressValue))
            {
                MessageBox.Show("StartAddress 格式无效", "warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                IsEnable = true;
                return;
            }

            if (!ushort.TryParse(NumberOfPoints, out ushort numberOfPointsValue))
            {
                MessageBox.Show("NumberOfPoints 格式无效", "warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                IsEnable = true;
                return;
            }
            //使用子线程进行读取，防止ui线程卡顿
            Task.Run(() =>
            {
                ushort[] result = _modbusRTU.ReadRegisters(slaveAddressValue, startAddressValue, numberOfPointsValue);
                if (result == null)
                {
                    MessageBox.Show("读取失败", "error", MessageBoxButton.OK, MessageBoxImage.Error);
                    ModbusLogList = GetOperateRegister();
                    IsEnable = true;
                    return;
                }
                string temp = "";
                int count =0;
                foreach (var item in result)
                {
                    count++;
                    temp += item;
                    temp += " ";
                    if (count % 25 == 0)
                    {
                        temp += "\n";
                    }
                }
                ReadResult = temp;
                MessageBox.Show("读取成功");
                IsEnable = true;
                ModbusLogList = GetOperateRegister();
            });

        }



        private void WriteRegister()
        {
            //将按钮设置为不可点击状态，并解析用户输入的信息
            IsEnable = false;
            if (!byte.TryParse(WriteSlaveAddress, out byte writeSlaveAddressValue))
            {
                MessageBox.Show("WriteSlaveAddress 格式无效", "warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                IsEnable = true;
                return;
            }
            if (!ushort.TryParse(WriteStartAddress, out ushort WriteStartAddressValue))
            {
                MessageBox.Show("WriteStartAddress 格式无效", "warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                IsEnable = true;
                return;
            }
            if (string.IsNullOrEmpty(WriteData))
            {
                MessageBox.Show("WriteData 格式无效", "warning", MessageBoxButton.OK, MessageBoxImage.Warning);
                IsEnable = true;
                return;
            }
            string[] parts = WriteData.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
            // 3. 创建结果数组
            ushort[] data = new ushort[parts.Length];

            // 4. 遍历并转换每个部分
            for (int i = 0; i < parts.Length; i++)
            {
                // 尝试解析为ushort
                if (ushort.TryParse(parts[i], out ushort value))
                {
                    data[i] = value;
                }
                else
                {

                    MessageBox.Show($"无法将 '{parts[i]}' 转换为 ushort 类型");
                    IsEnable = true;
                    return;
                }
            }

            //使用子线程来去执行操作，防止ui线程卡顿
            Task.Run(() =>
            {
                _modbusRTU.WriteRegisters(writeSlaveAddressValue, WriteStartAddressValue, data);
                ModbusLogList = GetOperateRegister();
                ModbusLog modbusLog = ModbusLogList.FirstOrDefault();
                if (modbusLog != null && modbusLog.ResponseData != string.Empty && modbusLog.ResponseData[3] != '8')
                {
                    MessageBox.Show("写入成功");
                    IsEnable = true;
                }
                else
                {
                    MessageBox.Show("写入失败", "error", MessageBoxButton.OK, MessageBoxImage.Error);
                    IsEnable = true;
                }
            });
            



        }
        /// <summary>
        /// 获取展示数据
        /// </summary>
        /// <returns></returns>
        private List<ModbusLog> GetOperateRegister()
        {
            return _modbusDbContext.ModbusLog
                   .Where(log => log.OperationType == "读寄存器" || log.OperationType == "写寄存器")
                   .OrderByDescending(log => log.Time)  // 按时间倒序，最新的在前
                   .Take(20)  // 只取前20条记录
                   .ToList();  // 执行查询
        }
    }
}