20211010_CZPM_upperpc/垂直剖面动态观测系统/ViewModel/FirstPageViewModel.cs

using LiveCharts;
using LiveCharts.Defaults;
using LiveCharts.Wpf;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using 垂直剖面动态观测系统.Common;
using 垂直剖面动态观测系统.DataAccess;
using 垂直剖面动态观测系统.Model;

namespace 垂直剖面动态观测系统.ViewModel
{
    public class FirstPageViewModel : NotifyBase
    {
        //propfull

        private int _instrumentValue = 0;

        public int InstrumentValue
        {
            get { return _instrumentValue; }
            set { _instrumentValue = value; this.DoNotify(); }
        }

        private int _itemCount;

        public int ItemCount
        {
            get { return _itemCount; }
            set { _itemCount = value; this.DoNotify(); }
        }

        private string _portName;

        public string PortName
        {
            get { return _portName; }
            set { _portName = value; this.DoNotify(); }
        }
        private int _baudRate;

        public int BaudRate
        {
            get { return _baudRate; }
            set { _baudRate = value; this.DoNotify(); }
        }

        private int myVar;

        public int MyProperty
        {
            get { return myVar; }
            set { myVar = value; }
        }

        GlobalValues GlobalValues = new GlobalValues();
        //赋值
        public FirstPageViewModel()
        {
            this.RefreshInitInstrumentValue();

            //this.InitCouseSeries();
            Console.WriteLine();
        }


        Random random = new Random();
        //当taskSwitch为true的时候线程内的方法会执行 为false的时候方法不会执行
        bool taskSwitch = true;

        //创建一个task的list
        List<Task> tasklist = new List<Task>();

        private void RefreshInitInstrumentValue()
        {
            var task = Task.Factory.StartNew(new Action(async () =>
            {
                while (taskSwitch)
                {
                    InstrumentValue = random.Next(Math.Max(this.InstrumentValue - 5, -10), Math.Min(this.InstrumentValue + 5, 90));

                    //停顿1秒
                    await Task.Delay(1000);
                }
            }));

            //将当前task放入list中
            tasklist.Add(task);
        }

        /// <summary>
        /// 用于结束当前的所有内部创建的线程
        /// </summary>
        public void Dispose()
        {
            try
            {
                //设置taskSwitch为false  停止线程内的方法
                taskSwitch = false;
                //等待线程内的当前方法执行完毕  就可以结束了
                Task.WaitAll(this.tasklist.ToArray());
            }
            catch (Exception)
            {
            }

        }


        /// <summary>
        /// 传感器数据获取
        /// </summary>
        public ObservableCollection<CourseSeriesModel> CourseSeriesList { get; set; } = new ObservableCollection<CourseSeriesModel>();

        public void InitCouseSeries()
        {
            var cList = LocalDataAccess.GetInstance().GetCoursePlayRecord();
            //查询列表中的最大数量值作为itemcount
            //this.ItemCount = cList.Max(c => c.SeriesList.Count());
            foreach (var item in cList) { 
                this.CourseSeriesList.Add(item);
            }
        }
    }
}