please see the following code:
<%@ Page language="c#" Codebehind="WebForm3.aspx.cs"
AutoEventWireup="false" Inherits="Test4.WebForm3" %>
<html>
<body>
<form id="f2" runat="server">
<input type="text" id="txt"/>
<div>Length of the string: <span id="txt_display">0</span></div>
</form>
<script type="text/javascript">
var textLen = function(ele) {
this.ele = ele;
this.display = document.getElementById(this.ele.id + "_display");
addEvent(this.ele, "keyup", this.dosearch.bind(this));
}
textLen.prototype = {
dosearch: function() {
Test4.WebForm3.GetLength(this.ele.value, this.ondata.bind(this));
},
ondata: function(res) {
this.display.innerHTML = res.value;
}
};
function init() {
var x = new textLen(document.getElementById("txt"));
x.ele.focus();
}
addEvent(window, "load", init);
</script>
</body>
</html>
//＝＝＝C#
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace Test4
{
/// <summary>
/// WebForm3
/// </summary>
public class WebForm3 : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{
AjaxPro.Utility.RegisterTypeForAjax(typeof(WebForm3));
}
[AjaxPro.AjaxMethod]
public int GetLength(string s)
{
return s.Length;
}
#region
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 -
不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}
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