初级菜鸟...
要做一个拍卖商品的功能：把到期时间从数据库中读出来，然后进行页面上的操作；
大体想法是这样的：读取服务器上的时间减去数据库中保存的截止日期，获得一个时间差，转换成秒；在页面上使用 setTimeout('showtime( ' + tempts + ') ', 1000)；函数即可。
前台代码：TimeOut.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TimeOut.aspx.cs" Inherits="quanxianmanager.Web.TimeOut" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function showtime(ts) {
var timerun = false; //是否启用
var Temp; //输出字符串
var tempts = ts - 1; //剩余秒数-1
//var startTime = (new Date()).getTime(); //当前时间
var dateLeft = 0; //剩余天数
var hourLeft = 0; //剩余小时
var minuteLeft = 0; //剩余分钟
var secondLeft = 0; //剩余秒钟
if (ts < 0)//剩余秒数为负则全部清0
{
ts = 0;
CurHour = 0;
CurMinute = 0;
CurSecond = 0;
} else {
dateLeft = parseInt(ts / 86400); //折合天数
ts = ts - dateLeft * 86400; //剩余秒数
hourLeft = parseInt(ts / 3600); //折合小时
ts = ts - hourLeft * 3600; //剩余秒数
minuteLeft = parseInt(ts / 60); //折合分钟
secondLeft = ts - minuteLeft * 60; //剩余秒数
}
//alert(dateLeft+"dd"+hourLeft+"mm"+minuteLeft+"ss"+secondLeft);
// if (hourLeft < 10 && hourLeft > 0) hourLeft = '0 ' + hourLeft; //小时左补0
// if (minuteLeft < 10 && minuteLeft > 0) minuteLeft = '0 ' + minuteLeft; //分钟左补0
// if (secondLeft < 10 && secondLeft >0)
// secondLeft = '0 ' + secondLeft; //秒钟左补0
if (dateLeft > 0)//天数> 0，显示天数
dateLeft = dateLeft + '天 ';
else//否则不显示天数
dateLeft = " ";
if (hourLeft > 0)//小时> 0，显示小时数
hourLeft = hourLeft + '小时 ';
else if (hourLeft==0){//否则判断天数是否也为0
if (dateLeft != " ")//天数不为0
hourLeft = "00 " + '小时 '; //显示小时数为00
else
hourLeft = " "; //否则不显示小时数
}
//alert(minuteLeft);
if (minuteLeft > 0) {//分钟是否为0
minuteLeft = minuteLeft + '分钟 ';
} //显示分钟
else if (minuteLeft == 0) {
if (dateLeft != " " || hourLeft != " ") {
minuteLeft = "00 " + '分钟 '; //天数和小时有一个不为0则显示00分钟
}
else {
minuteLeft = " "; //否则不显示分钟
}
}
//alert(minuteLeft)
//alert(secondLeft);
if ( secondLeft >0 )//秒钟是否为0
{
if (secondLeft < 10 && minuteLeft == " "&&hourLeft==" "&&dateLeft==" ") {
secondLeft = secondLeft + '秒 '; //不为0显示秒
} else {
secondLeft = secondLeft+"秒"; //秒钟左补0
}
}
else if(secondLeft==0){
if (dateLeft != " " || hourLeft != " " || minuteLeft != " ")
secondLeft = "00 " + '秒'; //天数、小时、分钟有一个不为0则显示00秒
else
secondLeft = "-1"; //否则不显示秒
}
Temp = dateLeft + hourLeft + minuteLeft + secondLeft; //合并字符串
if (Temp == " -1") {
Temp = " <B> 拍卖已到期 </B> "; //时间到停止倒计时
}
else {
Temp = "剩余时间： " + Temp;
timerun = true;
}
document.getElementById("showclock").innerHTML = Temp;
if (timerun)//继续倒计时
setTimeout('showtime( ' + tempts + ') ', 1000);
}
</script>
</head>
<body>
<form >
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:Label ID="Label2" runat="server"></asp:Label>
</div>
</form>
</body>
</html>
后台代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace quanxianmanager.Web
{
public partial class TimeOut : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//DateTime t1 = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss"));
DateTime t1 = Convert.ToDateTime("2011-12-12 23:59:58");
DateTime t2 = Convert.ToDateTime("2011-12-14 00:00:05");
Label1.Text = "开始时间： " + "2011-12-12 23:59:58" + ",结束时间： " + "2011-12-14 00:00:05";
TimeSpan ts = t2 - t1;
double timeEnd = ts.TotalSeconds;
if (timeEnd > 0)
{
Label2.Text = " <div id= \"showclock\"><script> showtime("+timeEnd+");</script> </div> ";
}
else
{
Label2.Text = " <B> 已结束 </B> ";
}
}
}
}
比较简单希望给急用的朋友帮助！