完整asp.net图形验证码程序代码,Asp.Net代码库,德仔网

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【Asp.Net】完整asp.net图形验证码程序

作者:Dezai.CN / 发布于2013/5/7/ 545


	1、测试页面：Default.aspx

	 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

	
	<!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>ASP.NET验证码</title>
	</head>
	<body>
	 <form id="form1" runat="server">
	 <div>
	 请输入验证码：<input id="txtVI" type="text" name="view_id" runat="server" maxlength="5" size="5"/>
	 <asp:Image id="Image1" runat="server" ImageUrl="ValidateCode.aspx" ImageAlign="Middle" />
	 <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="您没有输入验证码" ControlToValidate="txtVI"></asp:RequiredFieldValidator>
	 <asp:Button ID="Button1" runat="server" Text="提　交" OnClick="Button1_Click" /></div>
	 </form>
	</body>
	</html>

	

	

	2、测试页面后台：Default.aspx.cs

	

	using System;
	using System.Data;
	using System.Configuration;
	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 _Default : System.Web.UI.Page
	{
	 protected void Page_Load(object sender, EventArgs e)
	 {
	
	 }
	 protected void Button1_Click(object sender, EventArgs e)
	 {
	 string VNum;
	 VNum = Session["VNum"].ToString();
	 Session.Abandon();
	 ViewState["VNum"] = VNum;
	 if (txtVI.Value == ViewState["VNum"].ToString())
	 {
	 Response.Write("<script type="text/javascript">alert('验证码正确');</script>");
	 return;
	 }
	 else
	 {
	 Response.Write("<script type="text/javascript">alert('所填写的验证码不正确');</script>");
	 return;
	 }
	 }
	}

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　验证码程序　

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