C#线程倒计时器源码分享

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;using System.Windows.Forms;namespace ListZZBG{class TimeHeleper{Thread thread;private TimeSpan time; //计时时间 private TimeSpan endTime; //到点时间 private Label lb;private bool whereExit = true;/// <summary> /// 设定计时器计时的时间 /// </summary> /// <param name="StartTime">计时器时间，如：01:00:00 既1小时</param> public TimeHeleper(TimeSpan StartTime, Label lb){time = StartTime;this.lb = lb;}public void ShowLabel(){lb.Text = time.ToString();}/// <summary> /// 获取时间 /// </summary> /// <returns></returns> public TimeSpan GetTime(){return time;}/// <summary> /// 开启计时器 /// </summary> public void Open(){//计算到点时间 TimeSpan tsNow = TimeSpan.Parse(DateTime.Now.ToString("HH:mm:ss"));TimeSpan tsAdd = time;endTime = tsNow + tsAdd;//线程开始 whereExit = false;thread = new Thread(TimeThreadStart);thread.IsBackground = true;thread.Start();}/// <summary> /// 关闭计时器 /// </summary> public void Close(){whereExit = true;thread.Join(1000);}private void TimeThreadStart(){while (!whereExit){RunTime();Thread.Sleep(1000);}}private delegate void RunTimeDelegate();private void RunTime(){if (lb.InvokeRequired){RunTimeDelegate d = RunTime;lb.Invoke(d);}else{time = endTime - TimeSpan.Parse(DateTime.Now.ToString("HH:mm:ss"));string[] sp = time.ToString().Split(':');lb.Text = sp[2].ToString();  //liable1控件}}}}