1、可以实现验证码的自动更新。
2、验证码html代码
<li class="mjiao2"><span>验 证 码：</span>
<input class="search1" type="text" id="Txt_Code2" runat="server" />
<img id="img3" src="/VerifyCodeNew.aspx" title="看不清？点击更换" alt="验证码" style="cursor: pointer;
margin-right: 20px;" οnclick="this.src=this.src+'?';" width="100" height="32" />
<%-- <div id="span_code2" style="color: Red;"></div>--%>
<span id="span_code2" style="width: 100px;"></span>
</li>
3、跳转页面。这里的页面只是空页面，主要是需要后台代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="VerifyCodeNew.aspx.cs" Inherits="VerifyCodeNew" %>
<!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">
<div>
</div>
</form>
</body>
</html>
4、
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
public partial class VerifyCodeNew : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Initialization();
}
private void Initialization()
{
VerifyCodeNew v = new VerifyCodeNew();
v.Length = this.length;
v.FontSize = this.fontSize;
