C#实现倒计时的功能_仗劍走天涯_c# 倒计时

 软件界面：

软代码：

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 comport
{
    public partial class Form1 : Form
    {
        int count;
        int time;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)//下拉框的选择
        {
            int i;
            for (i = 0; i < 100; i++)
            {
                comboBox1.Items.Add(i.ToString() + " 秒");

            }
            comboBox1.Text = "5 秒";//下拉框选择的初始化
        }

        private void button1_Click(object sender, EventArgs e)//按键按下后的操作逻辑
        {
            string str = comboBox1.Text;//获取下拉框中选择的字符串内容
            time = Convert.ToInt16(str.Substring(0,2));//将下拉菜单中的字符串内容转换成整形
            progressBar1.Maximum = time;//进度条的最大值
            timer1.Start();//开始定时器
        }




        private void timer1_Tick(object sender, EventArgs e)//定时器工作处理流程
        {
            count++;//每到一定时间进入这个私有函数
            label3.Text = (time - count).ToString() + "秒";
            
            progressBar1.Value = count;
            if (count == time)
            {
                timer1.Stop();
                System.Media.SystemSounds.Asterisk.Play();//提示音
                MessageBox.Show("时间到", "提示");//提示对话框
            }
            
        }
    }
}
using System;
using System.C