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《ASP.NET1200例》C#在网页上编写动态时钟

2024-07-08 12:51:16   212人阅读

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(1000);                   t.Interval = 2000;           //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 = 1000;            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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