<%
@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager" runat="server" EnablePartialRendering="true" /><!-- Step 2: Wrap our existing code in an "UpdatePanel" --><asp:UpdatePanel ID="TimeStampPanel" runat="server"> <ContentTemplate> <asp:Button ID="UpdateButton" runat="server" Text="Update" /> <asp:TextBox ID="TimeStampTextBox" runat="server" /> </ContentTemplate></asp:UpdatePanel> </form></body></html>using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;public partial class Default2 : System.Web.UI.Page{
protected override void OnInit(EventArgs e)
{ this.UpdateButton.Click += delegate { this.TimeStampTextBox.Text = DateTime.Now.ToLongTimeString();
}; } protected void Page_Load(object sender, EventArgs e) { }
}参考
http://ajax.asp.net/docs/tutorials/IntroductionUpdatePanel.aspx