SunlightCentralizedControlManagement/ViewModel/MainWindowViewModel.cs

using SunlightCentralizedControlManagement_SCCM_.Properties;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows.Threading;
using static SunlightCentralizedControlManagement_SCCM_.UserClass.SqliteHelper;

namespace SunlightCentralizedControlManagement_SCCM_.ViewModel
{
    /// <summary>
    /// 变量传递至ui
    /// </summary>
    public class ViewModelBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
        public void RaisePropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
            {
                if (propertyName != null)
                {
                    PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
                }
            }
        }
    }
    public class MainWindowViewModel : ViewModelBase
    {
        public string sys_Time;  //显示系统时间
        public string Sys_Time  //通知UI控件参数改变
        {
            get { return sys_Time; }
            set { sys_Time = value; OnPropertyChanged("Sys_Time"); }
        }
        public void CountDown()
        {
            DispatcherTimer timer1s = new DispatcherTimer//初始化循环，每1秒调用一次Tick
            {
                Interval = TimeSpan.FromSeconds(1)//秒
            };
            timer1s.Tick += Tick_Event_1S;
            timer1s.Start();

            DispatcherTimer timer5s = new DispatcherTimer//初始化循环，每1秒调用一次Tick
            {
                Interval = TimeSpan.FromSeconds(5)//秒
            };
            timer5s.Tick += Tick_Event_5S;
            timer5s.Start();

            //设置定时器
            DispatcherTimer disTimer = new DispatcherTimer
            {
                Interval = TimeSpan.FromMilliseconds(500) //毫秒
            };
            disTimer.Tick += new EventHandler(DisTimer_500MS);//每一秒执行的方法
            disTimer.Start();//计时开始
        }//时间周期初始化
        void Tick_Event_1S(object sender, EventArgs e)//Tick_Event周期执行事件1S
        {
            Sys_Time = DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss");
        }
        void Tick_Event_5S(object sender, EventArgs e)//Tick_Event周期执行事件5S
        {
        }
        void DisTimer_500MS(object sender, EventArgs e)//Tick_Event周期执行事件500MS
        {
        }


        private SQLiteHelper SQLiteHelpers = null;  //定义数据库
        private readonly string DBAddress = Environment.CurrentDirectory + "\\DataBase\\SCCM.db";  //数据库路径
        public static DataTable Machines = new DataTable();  //设备表缓存
        public static View.info[] inf = new View.info[999]; //定义总览信息卡
        public MainWindowViewModel()
        {
            SQLiteHelpers = new SQLiteHelper(DBAddress); //数据库连接路径
            SQLiteHelpers.Open();  //打开数据库
            Machines = SQLiteHelpers.ExecuteDataSet("select * from Machines ", null).Tables[0];  //读取表写入缓存
            SQLiteHelpers.Close();

            CountDown();
        }










    }
}