如何创建一个秒表计时 [英] How to create a stopwatch timer

问题描述

我有一个应该像一个秒表计时的asp.net应用程序。我试图就如何得到定时器的变化用秒计时。我用了一个算法，主要是效率不高。然后，我用的时间跨度对象使用日期时间的数学尝试过，但因为这基本上由一个时钟是不理想的。现在我想实现System.Diagnostics程序，所以我可以用一个秒表对象。当我运行我的程序，那应该是与时间更新标签只显示全部为0。

I have an asp.net application that is supposed to act like a stopwatch timer. I've tried variations on how to get the timer to count time using seconds. I used an algorithm that was largely inefficient. I then tried using timespan objects using datetime math, but since this basically made a clock it was undesireable. Now I'm trying to implement System.Diagnostics so I can use a Stopwatch object. When I run my program, the label that is supposed to update with the time just displays all 0's.

这是与计时器和更新面板中的.aspx页面中的code：

This is the code in the .aspx page with the the timer and update panel:

      <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                    <ContentTemplate>
                        <asp:Timer ID="Timer1" runat="server" Enabled="false" 
                            Interval="1000" OnTick="Timer1_Tick"></asp:Timer>
                        <asp:Label ID="Label1" runat="server"></asp:Label>
                    </ContentTemplate>
                </asp:UpdatePanel>

这是启动秒表和定时器为我的启动按钮事件：

This is the event for my start button that starts the stopwatch and the timer:

      protected void Start_Click(object sender, EventArgs e)
    {
        //Start the timer
        Timer1.Enabled = true;
        stopWatch.Start();
    }

这是定时器事件（currentTime的是一个时间跨度对象）：

This is the event for the timer1 (currentTime is a timespan object):

      protected void Timer1_Tick(object sender, EventArgs e)
    {
        currentTime = stopWatch.Elapsed;
        Label1.Text = String.Format("{0:00}:{1:00}:{2:00}", 
        currentTime.Hours.ToString(), currentTime.Minutes.ToString(), 
        currentTime.Seconds.ToString());

老实说，我不知道我做错了。我想这将是使秒表计时最简单的方法，但没有在标签内改变。我想AP preciate的任何援助。如果有必要，我会提供更多的信息。

I honestly don't know what I'm doing wrong. I figured this would be the easiest way to make a stopwatch timer, but nothing is changing within the label. I would appreciate any assistance. I will provide more information if necessary.

推荐答案

试试下面的code。它为我工作。

Try the below code. It works for me.

添加下面的code在websource code：

Add the below code in websource code:

<asp:scriptmanager ID="Scriptmanager1" runat="server"></asp:scriptmanager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
  <ContentTemplate>
    <asp:Label ID="Label1" runat="server" Font-Size="XX-Large"></asp:Label>
    <asp:Timer ID="tm1" Interval="1000" runat="server" ontick="tm1_Tick" />
  </ContentTemplate>
  <Triggers>
    <asp:AsyncPostBackTrigger ControlID="tm1" EventName="Tick" />
  </Triggers>
</asp:UpdatePanel>

添加按照你的CS文件来源$ C ​​$ C：

Add following source code in your cs file:

using System.Diagnostics;

public partial class ExamPaper : System.Web.UI.Page
{
    public static Stopwatch sw;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            sw = new Stopwatch();
            sw.Start();
        }
    }

    protected void tm1_Tick(object sender, EventArgs e)
    {
        long sec = sw.Elapsed.Seconds;
        long min = sw.Elapsed.Minutes;

        if (min < 60)
        {
            if (min < 10)
                Label1.Text = "0" + min;
            else
                Label1.Text = min.ToString();

            Label1.Text += " : ";

            if (sec < 10)
                Label1.Text += "0" + sec;
            else
                Label1.Text += sec.ToString();
        }
        else
        {
            sw.Stop();
            Response.Redirect("Timeout.aspx");
        }
    }
} 

这篇关于如何创建一个秒表计时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！