《ASP.NET1200例》C#在网页上编写动态时钟

时间：2024-06-16 09:35:20

包含Timer类的命名空间有3个

Timer Class (System.Threading)‎

Timer Class (System.Windows.Forms)‎ 一般用于窗体程序

Timer Class (System.Timers)‎  一般用于控制台程序

using System;

using System.Timers;
class Program

    {

       public  static void Main()

        {

            Timer  t = new System.Timers.Timer();

            t.Interval = ;

           //t.AutoReset = false; //每到指定时间Elapsed事件是触发一次（false），还是一直触发（true）

            t.Enabled = true; //是否触发Elapsed事件

            t.Elapsed += new ElapsedEventHandler(t_Elapsed);

            Console.WriteLine("Press the Enter key to exit the program.");

           //从标准输入流读取下一行

            Console.ReadLine();

            // Keep the timer alive until the end of Main.

            GC.KeepAlive(t);

        }

        static void t_Elapsed(object sender, ElapsedEventArgs e)

        {

            Console.WriteLine("hello world!!");

        }

    }

Timer Class（using System.Web.UI）一般用于web程序

using System.Web.UI;
protected void Page_Load(object sender, EventArgs e)

        {

            Label1.Text = DateTime.Now.ToString();

            Timer1.Interval = ;

            Timer1.Enabled = true;

            Timer1.Tick += new EventHandler<EventArgs>(Timer1_Tick);

        }

        void Timer1_Tick(object sender, EventArgs e)

        {

            Label1.Text = DateTime.Now.ToString();

        }

此时前端代码.aspx

<body>

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

    <asp:ScriptManager ID="ScriptManager1" runat="server">

    </asp:ScriptManager>

    <div>

        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

            <asp:Timer ID="Timer1"

                runat="server">

            </asp:Timer>

    </div>

    </form>

</body>

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