《ASP.NET1200例》C#在网页上编写动态时钟
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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