求一段C#里考试倒计时的程序 祝大家 圣诞 元旦快乐

Question

DateTime startTime;
Start()
{
 startTime = DateTime.Now;
}timer_tick()
{
   //check in timer_tick or other method
   TimeSpan span = DateTime.Now - startTime;
   if (span.Minutes > 60)
   {
        Stop();
   }
}

Answer 1

<script language="javascript">
function shengyushijian()
{
......
}
setinterval(shengyushijian);
</script>

Answer 2

      private void button1_click(object sender, EventArgs e)
        {
                    timer1.Enabled = true;
                    timer1.Interval = 1000;
                    second = Convert.ToInt32(textBox2.Text) * 60;
       } 
       private void timer1_Tick(object sender, EventArgs e)
        {
            // label5.Text = (Convert .ToInt32( textBox2 .Text)*60 - 1).ToString ();
            if (second >= 0)
            {
                label7.Text = second.ToString();
                second--;
                if (second == 5)
                {
                    MessageBox.Show("时间到.请交试卷");
                }
                if (second == 0)
                {
                    button2.Enabled = false;
                    //button2.Visible = false;
                }
            }
        }

Answer 3

可不可以换中思考方式，那就是不管你在这一个小时内如何刷新都是那些题目？hoho~

Answer 4

禁止F5和菜单 刷新<script type="text/javascript">     function document.onkeydown()   
          {if(event.keyCode==116)   
                      {event.keyCode=0   
                          event.returnValue=false;   
                      }   
          }   
    
          document.oncontextmenu=function(){return   false}     </script>

Answer 5

用AJAX实时获取服务器端时间再用程序来实现倒计时.