TrainCamp_zhangyongpan_Modbus/ModbusDemo/VIewModel/CoilUCViewModel.cs

using ModbusDemo.Device;
using ModbusDemo.Model;
using Prism.Commands;
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
{
    /// <summary>
    /// 这是CoilUC的VM用来支持数据绑定
    /// </summary>
    public class CoilUCViewModel : BindableBase
    {
        //定义数据库操作
        private ModbusDbContext _modbusDbContext;
        //获取读线圈的类
        private IModbusRTU _modbusRTU;
        //定义读线圈的命令
        public DelegateCommand ReadCoilCmm { get; set; }
        //定义写线圈操作
        public DelegateCommand WriteCoilCmm { get; set; }
        //获取当前使用的串口
        private SerialPort _serialPort;
        //显示当前链接串口的信息
        public string SerialPortInfo
        {
            get
            {
                return "当前链接的状态：" + "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;

            }
        }


        #endregion


        private List<ModbusLog> _modbusLogList;

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

        public CoilUCViewModel()
        {

        }

        public CoilUCViewModel(SerialPort serialPort, ModbusRTU modbusRTU, ModbusDbContext modbusDbContext)
        {
            _serialPort = serialPort;
            ReadCoilCmm = new DelegateCommand(ReadCoil);
            _modbusRTU = modbusRTU;
            WriteCoilCmm = new DelegateCommand(WriteCoil);
            _modbusDbContext = modbusDbContext;
            //初始化查询操作
            ModbusLogList = GetOperateCoil();
        }

        /// <summary>
        /// 线圈读取操作
        /// </summary>
        private void ReadCoil()
        {
            try
            {
                bool[] result = _modbusRTU.ReadCoil(byte.Parse(SlaveAddress),
                                                ushort.Parse(StartAddress),
                                                ushort.Parse(NumberOfPoints));
                if (result != null)
                {
                    string temp = "";
                    foreach (var item in result)
                    {
                        temp += item;
                        temp += " ";
                    }
                    ReadResult = temp;
                }
            }
            catch (Exception)
            {

                MessageBox.Show("参数配置错误");
            }

        }
        private void WriteCoil()
        {
            //去除字符串中的空格
            WriteData = WriteData.Replace(" ", "");
            //转换为布尔数组
            bool[] data = WriteData.Select(m => m == '1').ToArray();

            try
            {
                _modbusRTU.WriteCoil(byte.Parse(WriteSlaveAddress),
                                     ushort.Parse(WriteStartAddress),
                                     data);
            }
            catch (Exception)
            {

                MessageBox.Show("信息配置错误");
            }

        }

        /// <summary>
        /// 获取展示数据
        /// </summary>
        /// <returns></returns>
        private List<ModbusLog> GetOperateCoil()
        {
               return _modbusDbContext.ModbusLog
                      .Where(log => log.OperationType == "读线圈" || log.OperationType == "写线圈")
                      .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
        }
    }
}