C#实现倒计时的功能

发布网友发布时间：2022-05-11 01:05

共2个回答

热心网友时间：2022-04-23 09:44

　　C#实现倒计时功能，参考代码如下：

int Timecount = 0;//记录倒计时总毫秒数
        int isstop = 0;//标示是否启动/暂停的变量，0表示第一次初始化
        private void button1_Click(object sender, EventArgs e)
        {
            if (this.button1.Text == "开始计时" || this.button1.Text == "继续计时")
            {
                this.button1.Text = "暂停计时";
                //this.timer1.Interval = 1;
                //this.timer1.Start();
                if (isstop == 0)//第一次执行或者倒计时事件设置发生变化，则重新倒计时
                {
                    Timecount = Convert.ToInt32(txtTotalmm.Text) * 60000;//毫秒
                    Thread counter = new Thread(Counter);
                    counter.Start();
                    Control.CheckForIllegalCrossThreadCalls = false;//放弃捕获对错误线程的调用，否则在线程中无法调用控件名
                    this.txtTotalmm.ReadOnly = true;
                    this.button2.Visible = false;
                    txthour.ForeColor = Color.Black;
                    txtmm.ForeColor = Color.Black;
                    txtss.ForeColor = Color.Black;
                    txtmss.ForeColor = Color.Black;
                }
                isstop = 1;//启动
            }
            else
            {
                this.button1.Text = "继续计时";
                //this.timer1.Stop();
                isstop = 2;//暂停
            }
        }
        public void Counter()
        {
            try
            {
                while (Timecount >= 0)
                {
                    this.txthour.Text = (Timecount / 3600000).ToString();
                    this.txtmm.Text = ((Timecount / 60000) % 60).ToString();
                    this.txtss.Text = ((Timecount / 1000) % 60).ToString();
                    this.txtmss.Text = (Timecount % 1000).ToString();
                    //label1.Text = hour.ToString() + "时 " + minute.ToString() + "分 " + second.ToString() + "秒" + millsecond + "毫秒";
                    if (Timecount == 0)
                    {
                        txthour.ForeColor = Color.Red;
                        txtmm.ForeColor = Color.Red;
                        txtss.ForeColor = Color.Red;
                        txtmss.ForeColor = Color.Red;
                        this.txtTotalmm.ReadOnly = false;
                        this.button2.Visible = true;
                        this.button1.Text = "开始计时";
                        isstop = 0;
                        try
                        {
                            Thread currthread = Thread.CurrentThread;
                            currthread.Abort();// 终止当前进程，会触发ThreadAbortException异常，从而终止进程，所以下面需要捕获该异常才能终止进程
                        }
                        catch (ThreadAbortException) { }
                    }
                    if (isstop != 2)
                        Timecount -= 1;
                    Thread.Sleep(1);
                }
            }
            catch { }//处理异常关闭情况下的异常问题
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.txtTotalmm.Text = (Convert.ToInt32(this.txtTotalmm.Text) + 1).ToString();
        }
        //Timer控件的Interval频率值小于17时便会产生误差，所有得到的倒计时秒数比普通的慢很多，当倒计时精确到毫秒时，则不适用用Timer控件。
        //private void timer1_Tick(object sender, EventArgs e)
        //{
        //    if (Timecount >= 0)
        //    {
        //        this.txthour.Text = (Timecount / 3600000).ToString();
        //        this.txtmm.Text = ((Timecount / 60000) % 60).ToString();
        //        this.txtss.Text = ((Timecount / 1000) % 60).ToString();
        //        this.txtmss.Text = (Timecount % 1000).ToString();
        //        //label1.Text = hour.ToString() + "时 " + minute.ToString() + "分 " + second.ToString() + "秒" + millsecond + "毫秒";
        //        if (Timecount == 0)
        //        {
        //            txthour.ForeColor = Color.Red;
        //            txtmm.ForeColor = Color.Red;
        //            txtss.ForeColor = Color.Red;
        //            txtmss.ForeColor = Color.Red;
        //        }
        //        Timecount -= 10;
        //    }
        //}

　　注意：

　　1.倒计时如果是以秒为单位，可以选择Timer和线程来实现，如果以毫秒为单位，建议使用线程来实现。

　　2.使用线程时，如果要暂停，需要使用Abort()方法终止线程，该方法是通过触发ThreadAbortException异常来实现对线程的终止的，所以需要捕获该异常，才能终止线程。所以 Abort()引发的该异常时正常的。

热心网友时间：2022-04-23 11:02

刚好有空给你写了一个代码：using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.IO;namespace WinForm_test_01
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} int hour = 12;
int minute = 0;
int second = 0;
private void button1_Click(object sender, EventArgs e)
{
Thread thread = new Thread(Func);
thread.Start();
} private void Func()
{
while (hour > 0)
{
this.Invoke((EventHandler)delegate {

if (second < 0)
{
second = 59;
minute--; }
if (minute < 0)
{
minute = 59;
hour--;
}
label1.Text = "剩余时间：" + hour.ToString() + "小时 " + minute.ToString() + "分钟 " + second.ToString() + "秒";
});
Thread.Sleep(1000);
second--;
}
} }

}
有不明白的地方请追问.