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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;
// }
//} | 
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