定时器计数

1、添加几个控件(3个Lable、一个combobox控件、一个Button控件、一个progressBar控件以及一个timer定时器控件)

2、combobox控件属性下修改DropDownStyle属性为DropDownList、timer控件修改属性Interval 100改为1000毫秒、窗体固定FormBorderStyle属性改为FixedSingle

3、代码实现

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 _02计时器
{
    public partial class Form1 : Form
    {
        int count;
        int time;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            int i;
            for(i=1;i<=10;i++)
            {
              comboBox1.Items.Add(i.ToString()+" 秒");
            }
            comboBox1.Text = "1 秒";
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            count++;
            label3.Text = (time - count).ToString()+" 秒";
            progressBar1.Value = count;
            if (count == time)
            {
                timer1.Stop();
                MessageBox.Show("时间到", "提示");
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string str = comboBox1.Text;
            time = Convert.ToInt16(str.Substring(0, 2));
            progressBar1.Maximum = time;
            timer1.Start();
        }
       
    }
}