怎么在网页中实现动态显示时间？

我在Page_Load事件中定义了三个Label；Label1用于存放游客进入页面的时间；
object currentTime=System.DateTime.Now;
        Label1.Text =currentTime.ToString();
Label2想用于动态显示当前的系统时间；
Label3想用与显示游客进入了多长时间；
可是，Label2和Label3的代码写不出来，帮帮忙。
还有，有人跟我说不能用控件的方式显示时间，这样会加重服务器端的负担，那要怎么弄，
麻烦写个代码给我，研究，研究，谢谢...

解决方案 »

  1.   

    function showLeftTime(){var now=new Date();var year=now.getYear();var month=now.getMonth();var day=now.getDate();var hours=now.getHours();var minutes=now.getMinutes();var seconds=now.getSeconds();document.all.show.innerHTML=""+year+"年"+month+"月"+day+"日 "+hours+":"+minutes+":"+seconds+"";//一秒刷新一次显示时间var timeID=setTimeout(showLeftTime,1000);}
      

  2.   

    需要一个timertimer 得enable=true。 interval设置一下，
    timer 包含在ScriptManager 里
    如
    <asp:ScriptManager runat="server" id="ScriptManager1" />
    <asp:UpdatePanel runat="server" id="UpdatePanel1" 
        UpdateMode="Conditional">
      <contenttemplate>
        <asp:Timer id="Timer1" runat="server"
          Interval="120000" 
          OnTick="Timer1_Tick">
        </asp:Timer>
      </contenttemplate>
    </asp:UpdatePanel>protected void Timer1_Tick(object sender, EventArgs e)
        {
            this.Label2.Text = DateTime.Now.ToString();
            this.Label3.Text = (Convert.ToDateTime(this.Label2.Text) - Convert.ToDateTime(this.Label1.Text)).ToString();
        }
      

  3.   

    用了asp.net丢弃JAVASCRIPT了？干嘛不在aspx文件里写JS呢？
      

  4.   

    当然是JS了，网上找找。一对的时间显示控件。如果需要读服务器时间，Ajax。
      

  5.   

    javaScript真的有点忘记了诶？？
      

  6.   

    方法比较多简单的有Flash或者Js
      

  7.   

    function showLeftTime() { var now=new Date(); var year=now.getYear(); var month=now.getMonth(); var day=now.getDate(); var hours=now.getHours(); var minutes=now.getMinutes(); var seconds=now.getSeconds(); document.all.show.innerHTML=""+year+"年"+month+"月"+day+"日 "+hours+":"+minutes+":"+seconds+""; //一秒刷新一次显示时间 var timeID=setTimeout(showLeftTime,1000); }
      

  8.   

    function showLeftTime() { var now=new Date(); var year=now.getYear(); var month=now.getMonth(); var day=now.getDate(); var hours=now.getHours(); var minutes=now.getMinutes(); var seconds=now.getSeconds(); document.all.show.innerHTML=""+year+"年"+month+"月"+day+"日 "+hours+":"+minutes+":"+seconds+""; //一秒刷新一次显示时间 var timeID=setTimeout(showLeftTime,1000); }
      

  9.   

    function showLeftTime() { var now=new Date(); var year=now.getYear(); var month=now.getMonth(); var day=now.getDate(); var hours=now.getHours(); var minutes=now.getMinutes(); var seconds=now.getSeconds(); document.all.show.innerHTML=""+year+"年"+month+"月"+day+"日 "+hours+":"+minutes+":"+seconds+""; //一秒刷新一次显示时间 var timeID=setTimeout(showLeftTime,1000); }
      

  10.   


    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %><!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>
    </head>
    <body>
        <form id="form1" runat="server">
        <div>
            <span id="time1"></span>
            <br />
            <span id="time2"></span>
            <br />
            <span id="time3"></span>        <script type="text/javascript">
                var CallTimeLen = "0";
                var start = false;
                function showTime() {
                    var now = new Date();
                    var year = now.getYear();
                    var month = now.getMonth() + 1;
                    var day = now.getDate();
                    var hours = now.getHours();
                    var minutes = now.getMinutes();
                    var seconds = now.getSeconds();
                    var hour = "0";
                    var minute = "0";
                    var second = "0";
                    CallTimeLen = parseInt(CallTimeLen) + 1;
                    hour = parseInt(CallTimeLen / 3600);
                    minute = parseInt(CallTimeLen / 60);
                    second = CallTimeLen % 60 - 1;
                    document.getElementById("time2").innerHTML = year + "年" + month + "月" + day + "日 " + hours + "时" + minutes + "分" + seconds + "秒";
                    if (second == "0") {
                        if (minute == "0") {
                            document.getElementById("time3").innerHTML = "在线时间: 0时&nbsp;&nbsp;0分&nbsp;&nbsp;" + second + "秒";
                        }
                        else {
                            document.getElementById("time3").innerHTML = "在线时间: 0时&nbsp;&nbsp;" + minute + "&nbsp;&nbsp;分&nbsp;&nbsp;" + second + "秒";
                        }
                    }
                    else {
                        if (minute == "0") {
                            document.getElementById("time3").innerHTML = "在线时间: " + hour + "时&nbsp;&nbsp;0&nbsp;&nbsp;分&nbsp;&nbsp;" + second + "秒";
                        }
                        else {
                            document.getElementById("time3").innerHTML = "在线时间: " + hour + "时&nbsp;&nbsp;" + minute + "&nbsp;&nbsp;分&nbsp;&nbsp;" + second + "秒";
                        }
                    }
                    var timeID = setTimeout(showTime, 1000);            }
                window.onload = function() {
                    var now = new Date();
                    var year = now.getYear();
                    var month = now.getMonth() + 1;
                    var day = now.getDate();
                    var hours = now.getHours();
                    var minutes = now.getMinutes();
                    var seconds = now.getSeconds();
                    document.getElementById("time1").innerHTML = year + "年" + month + "月" + day + "日 " + hours + "时" + minutes + "分" + seconds + "秒";
                    showTime();
                }
            </script>    </div>
        </form>
    </body>
    </html>
      

  11.   

    修改一个小地方:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %><!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>
    </head>
    <body>
        <form id="form1" runat="server">
        <div>
            <span id="time1"></span>
            <br />
            <span id="time2"></span>
            <br />
            <span id="time3"></span>        <script type="text/javascript">
                var CallTimeLen = "0";
                var start = false;
                function showTime() {
                    var now = new Date();
                    var year = now.getYear();
                    var month = now.getMonth() + 1;
                    var day = now.getDate();
                    var hours = now.getHours();
                    var minutes = now.getMinutes();
                    var seconds = now.getSeconds();
                    var hour = "0";
                    var minute = "0";
                    var second = "0";
                    CallTimeLen = parseInt(CallTimeLen) + 1;
                    hour = parseInt(CallTimeLen / 3600);
                    minute = parseInt(CallTimeLen / 60);
                    second = CallTimeLen % 60 - 1;
                    document.getElementById("time2").innerHTML = year + "年" + month + "月" + day + "日 " + hours + "时" + minutes + "分" + seconds + "秒";
                    if (hour == "0") {
                        if (minute == "0") {
                            document.getElementById("time3").innerHTML = "在线时间: 0时&nbsp;&nbsp;0分&nbsp;&nbsp;" + second + "秒";
                        }
                        else {
                            document.getElementById("time3").innerHTML = "在线时间: 0时&nbsp;&nbsp;" + minute + "&nbsp;&nbsp;分&nbsp;&nbsp;" + second + "秒";
                        }
                    }
                    else {
                        if (minute == "0") {
                            document.getElementById("time3").innerHTML = "在线时间: " + hour + "时&nbsp;&nbsp;0&nbsp;&nbsp;分&nbsp;&nbsp;" + second + "秒";
                        }
                        else {
                            document.getElementById("time3").innerHTML = "在线时间: " + hour + "时&nbsp;&nbsp;" + minute + "&nbsp;&nbsp;分&nbsp;&nbsp;" + second + "秒";
                        }
                    }
                    var timeID = setTimeout(showTime, 1000);            }
                window.onload = function() {
                    var now = new Date();
                    var year = now.getYear();
                    var month = now.getMonth() + 1;
                    var day = now.getDate();
                    var hours = now.getHours();
                    var minutes = now.getMinutes();
                    var seconds = now.getSeconds();
                    document.getElementById("time1").innerHTML = year + "年" + month + "月" + day + "日 " + hours + "时" + minutes + "分" + seconds + "秒";
                    showTime();
                }
            </script>    </div>
        </form>
    </body>
    </html>