<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication2.WebForm1" %> <!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></title> </head> <body> <form id="form1" runat="server"> <script type="text/javascript"> function getResult(arg,context) { <%=Page.ClientScript.GetCallbackEventReference(this, "arg", "page_callback", "context", "page_error", false)%>; } function page_callback(arg, context) { document.getElementById("result").innerHTML = arg; } function page_error(arg, context) { alert("error"); } </script> <div id="result"> </div> <input id="Button1" type="button" value="button" onclick="getResult(null,null)" /> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace WebApplication2 { public partial class WebForm1 : System.Web.UI.Page, ICallbackEventHandler { private string result = ""; protected void Page_Load(object sender, EventArgs e) { } public string GetCallbackResult() { return result; } public void RaiseCallbackEvent(string eventArgument) { result = DateTime.Now.ToString(); } } }