timer控件

功能：實現控制數字變化過程

功能效果圖

代碼：

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 gundon
{
    public partial class Form1 : Form
    {
        Double index = 1;
        public Form1()
        {
            InitializeComponent();
            timer1.Interval = 100;//變化時間間隔100 = 0.1秒
            timer1.Tick += new EventHandler(timer1_Tick);//綁定間隔事件

        }

        private void timer1_Tick(object sender, EventArgs e)
        {

            index ++;//數字變化，自增1
            l1.Text = index.ToString();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;//關閉定時器
        }
        private void l1_Click(object sender, EventArgs e)
        {

        }
        private void button2_Click(object sender, EventArgs e)
        {
            timer1.Enabled = true;//開啓定時器
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Application.Exit();//退出程序
        }

    }
}