求购物“秒杀”写法 如何获取服务器时间

private DateTime dtExam = DateTime.Parse("2010-07-26 17:42:00"); //定义时间到期时间   

protected void timerCD_Tick(object sender, EventArgs e)  

  {  

  if (this.dtExam < DateTime.Now) //如果设置的时间已过

  {

  this.timerCD.Enabled = false; //将Timmer置为false

  labTimes.Text = "时间到！";

  }  

  else  

  {

  RefreshTime(); //刷新时间

  }  

  }  



  private void RefreshTime() //刷新时间的方法

  {  

  TimeSpan ts = this.dtExam - DateTime.Now; //时间差

  this.labDays.Text = ts.Days.ToString().PadLeft(2, '0') + "天";  

  this.labTimes.Text = ts.Hours.ToString().PadLeft(2, '0') + ":" + ts.Minutes.ToString().PadLeft(2, '0') + ":" + ts.Seconds.ToString().PadLeft(2, '0');  

  }



前台代码：

<form id="form1" runat="server">

  <div>

   </div>

   <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox> 

  <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

  时<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>分<asp:ScriptManager ID="ScriptManager1" runat="server">

  </asp:ScriptManager>

  <asp:UpdatePanel ID="UpdatePanel1" runat="server">

  <ContentTemplate>

  <asp:Timer ID="timerCD" runat="server" Interval="1000" OnTick="timerCD_Tick">

  </asp:Timer>

  <asp:Label ID="labDays" runat="server" Width="155px"></asp:Label><asp:Label ID="labTimes" runat="server" Width="155px"></asp:Label>

  </ContentTemplate>

  </asp:UpdatePanel>

  </form>

$(document).ready(function() {

  //电子电器

  var CountdownTImeE = $("input[id*=txtElectronCountdownTime]").val(); //倒计时



  if (CountdownTImeE != "" && CountdownTImeE != null) {

  var year = CountdownTImeE.split(' ')[0].split('-')[0]; //年

  var month = CountdownTImeE.split(' ')[0].split('-')[1]; //月

  var day = CountdownTImeE.split(' ')[0].split('-')[2]; //日

  var hour = CountdownTImeE.split(' ')[1].split(':')[0]; //时

  var min = CountdownTImeE.split(' ')[1].split(':')[1]; //分

  var second = CountdownTImeE.split(' ')[1].split(':')[2]; //秒

  var time = month + "/" + day + "/" + year + " " + hour + ":" + min + ":" + second;



  var endtime = new Date(time); //时间格式："7/21/2010 09:48:00"

  var nowtime = new Date();

  var maxtime = (endtime.getTime() - nowtime.getTime()) / 1000;



  var timer = setInterval("daojishiE()", 1000);



  if (maxtime <= 0) {



  $(".xs-qg-qw").eq(0).show();

  $(".xs-qg-qg").eq(0).hide();

  $(".xs-qg-qw").eq(1).show();

  $(".xs-qg-qg").eq(1).hide();

  clearInterval(timer);

  document.getElementById('showdateElectron').innerHTML = "<i>电子电器:</i><b>剩</b><em>00< /em><b>时</b><em>00</em><b>分< /b><em>00</em><b>秒</b>";

  }

  daojishiE = function() {

  if (maxtime >= 0) {

  //day = Math.floor(maxtime / 3600 / 24);

  hours = Math.floor(maxtime / 3600);

  minutes = Math.floor((maxtime / 60) % 60);

  seconds = Math.floor(maxtime % 60);

  msg = "<i>电子电器:</i><b>剩</b>" + "<em>" + hours + "</em>" + "<b>时</b>" + "<em>" + minutes + "</em>" + "<b>分</b>" + "<em>" + seconds + "</em>" + "<b>秒</b>";

  document.getElementById('showdateElectron').innerHTML = msg;

  //if(maxtime == 5*60) alert('注意，还有5分钟!');

  --maxtime;

  }

  else {



  var proid = "";

  $("#divCountdown input[id='hidProidE']").each(function() {

  proid += $(this).val() + ",";

  });

  $.get("/AjaxBehind/DefaultHandler.ashx", { type: "edit", proidlist: proid }, function(data) {

  $("#showdateElectron").html(data);

  clearInterval(timer);

  window.location = window.location;

  });



  }

  }

  }

});

          if (DateTime.Compare(pt.EndTime, DateTime.Now) > 0)//时间对比

        {

              //pt.EndTime就是你数据库设置的结束时间

              //秒杀成功的处理代码

        }

        {

            ShowMessageBox("活动已结束，请关注下次活动！");

        }