C#计时器简单使用

实例一：计时器
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsFormsApplication1
{
    public partial class Timer : Form
    {
        public Timer()
        {
            InitializeComponent();
        }
      
        private void Form1_Load(object sender, EventArgs e)
        {
 
        }
 
        System.Timers.Timer t = new System.Timers.Timer();//实例化Timer类
 
        private void btnTimer_Click(object sender, EventArgs e)
        {
            int intTime = 3000;
            t.Interval = intTime;//设置间隔时间，为毫秒；
            t.Elapsed += new System.Timers.ElapsedEventHandler(theout);//到达时间的时候执行事件；
            t.AutoReset = true;//设置是执行一次（false）还是一直执行(true)；
            t.Enabled = true;//是否执行System.Timers.Timer.Elapsed事件；
        }
        public void theout(object source, System.Timers.ElapsedEventArgs e)
        {   //MessageBox.Show 一种消息提示对话框。该对象只有winform程序才有，可设置内容，标题，按钮，图标，按钮焦点等参数
            MessageBox.Show(e.SignalTime.ToString(), "标题", MessageBoxButtons.OKCancel, MessageBoxIcon.Question,MessageBoxDefaultButton.Button1);
        }
 
        private void btnOpenForm2_Click(object sender, EventArgs e)
        {
            Form2 f = new Form2();
            f.Show();
            this.Visible = false;
        }
    }
}
实例二：倒计时功能
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
 
        int mint = 10;
        int scss = 59;
        private void Form2_Load(object sender, EventArgs e)
        {
            label1.Text = mint + "分";
            label2.Text = scss + "秒";
            this.timer1.Interval = 1000; //设置间隔时间，为毫秒；
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);////设置每间隔3000毫秒（3秒）执行一次函数timer1_Tick
            this.timer1.Start();
        }
 
        private void timer1_Tick(object sender, EventArgs e)
        {
            if (mint >= 0)
            {
                scss--;
                if (scss == 0)
                {
                    mint--;
                    label1.Text = mint.ToString() + "分";
                    scss = 59;
                }
                label2.Text = scss.ToString() + "秒";
            }
        }
    }
}