小小定时器

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TimerTest2
{
    public partial class Form1 : Form
    {
        
        //定义全局变量
        public int currentCount = 0;
        //定义Timer类
        System.Timers.Timer timer;
        //定义委托
        public delegate void SetControlValue(string value);

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            InitTimer();
        }
        DateTime initTime;
        /// <summary>
        /// 初始化Timer控件
        /// </summary>
        private void InitTimer()
        {
            //设置定时间隔(毫秒为单位)
            int interval = 1000;
            initTime = DateTime.Now;//初始时间


            timer = new System.Timers.Timer(interval);
            //设置执行一次（false）还是一直执行(true)
            timer.AutoReset = true;
            //设置是否执行System.Timers.Timer.Elapsed事件
            timer.Enabled = true;
            //绑定Elapsed事件
            timer.Elapsed += new System.Timers.ElapsedEventHandler(TimerUp);
        }


        /// <summary>
       /// Timer类执行定时到点事件
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
       private void TimerUp(object sender, System.Timers.ElapsedEventArgs e)
       {
           try
           {
               //if ((DateTime.Now-initTime).TotalSeconds>5)
               //{
               //    //currentCount += 1;
               //    this.Invoke(new SetControlValue(SetTextBoxText), 0);
               //}
               currentCount += 1;
               this.Invoke(new SetControlValue(SetTextBoxText),currentCount.ToString());
           }
           catch (Exception ex)
           {
               MessageBox.Show("执行定时到点事件失败:" + ex.Message);
           }
       }

        private void SetTextBoxText(string strValue)
        {
            this.textBox1.Text = this.currentCount.ToString().Trim();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timer.Start();
            var endTime = DateTime.Now;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            timer.Stop();
        }

      
    }
}