谁给个验证码的完整代码谢谢!!!

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
string   VNum   =   "";
VNum   =   this.RndNum(4);
Session["VNum"]   =   VNum;
this.ValidataCode(VNum);
} public   void   ValidataCode(string   str)
{
System.Drawing.Bitmap   Img;
Graphics   g;
MemoryStream   ms;
int   gheight   =   str.Length*11;
Img   =   new   Bitmap(gheight,20);
g   =   Graphics.FromImage(Img);
SolidBrush   sb   =   new   SolidBrush(Color.DarkSlateBlue);
Font   ft   =   new   Font("Arial",10);
g.DrawString(str,ft,sb,3,3);
ms   =   new   MemoryStream();
Img.Save(ms,ImageFormat.Png);
Response.ClearContent();
Response.ContentType   =   "image/Png";
Response.BinaryWrite(ms.ToArray());
g.Dispose();
Img.Dispose();
Response.End();
}

public   string   RndNum(int   i)
{
string   VNum   =   "";
Random   Rnd   =   new   Random();
string   Vchar   =   "0,1,2,3,4,5,6,7,8,9";
string[]   Vc   =   Vchar.Split(',');
for(int   k   =0;k<i;k++)
{
VNum   =   VNum   +   Vc[Rnd.Next(0,9)];
}
return   VNum;
}

-------------------Validate.aspx------------------<%@ Page Language="C#" %>
<%@ import namespace="System"%>
<%@ import namespace="System.IO"%>
<%@ import namespace="System.Drawing"%>
<%@ import namespace="System.Drawing.Imaging"%>
<%@ import namespace="System.Drawing.Drawing2D"%><script runat="server">
private Bitmap validateimage;
private Graphics g;
public void  Page_Load(object Sender   ,EventArgs e  ){
     Response.BufferOutput = true;   //特别注意
     Response.Cache.SetExpires(DateTime.Now.AddMilliseconds(-1));//特别注意
     Response.Cache.SetCacheability(HttpCacheability.NoCache);//特别注意
     Response.AppendHeader("Pragma", "No-Cache"); //特别注意
    string  VNum  =MakeValidateCode( );
Session["VNum"]=VNum;//取得验证码，以便后来验证
    ValidateCode(VNum);}
public void  ValidateCode(string VNum)
{
validateimage = new Bitmap(60, 20, PixelFormat.Format24bppRgb);
g = Graphics.FromImage(validateimage);
g.FillRectangle(new LinearGradientBrush(new Point(0,0), new Point(110,20), Color.FromArgb(240,255,255,255),Color.FromArgb(240,255,255,255)),0,0,200,200);
g.DrawString(VNum, new Font("arial",11),new SolidBrush(Color.Red),new PointF(6,0));
g.Save();
MemoryStream ms=new MemoryStream();
validateimage.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
Response.ClearContent();
Response.ContentType="image/bmp";
Response.BinaryWrite(ms.ToArray());
Response.End();
}  string MakeValidateCode()
{
char[] s = new char[]{'0','1', '2','3','4','5','6','7','8','9','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
string num = "";
Random r = new Random();
for(int i = 0; i < 5; i++)
{
num += s[r.Next(0, s.Length)].ToString();
}
return num;
}
</script>-----------------------register.aspx------------<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Register.aspx.cs" Inherits="MyRegister.Register" %><!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>会员注册</title>
    <LINK href="stylesheet.css" _fcksavedurl=""stylesheet.css"" _fcksavedurl=""stylesheet.css"" _fcksavedurl=""stylesheet.css"" type="text/css" rel="stylesheet">
</head>
<body>
    <form id="form1" runat="server">
    <div class="middle" style="height: 1px" >
    <div >
        <asp:Label ID="UserName" runat="server" Text="用户名：" ></asp:Label>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    </div>
    <div >
        <asp:Label ID="UserPsw" runat="server" Text="密码：" ></asp:Label>
        <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox></div>
    <div >
        <asp:Label ID="Label2" runat="server" Text="确认密码：" ></asp:Label>
        <asp:TextBox ID="TextBox6" runat="server"></asp:TextBox></div>
    <div >
        <asp:Label ID="Question" runat="server" Text="找回密码问题："></asp:Label>
        <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox></div>
    <div>
        <asp:Label ID="Answer" runat="server" Text="找回密码答案："></asp:Label>
        <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox></div>
    <div >
        <asp:Label ID="Email" runat="server" Text="电子邮件："></asp:Label>
        <asp:TextBox ID="TextBox5" runat="server"></asp:TextBox></div>
    <div >
        <asp:Label ID="Label1" runat="server" Text="验证码："></asp:Label>
        <asp:TextBox ID="CheckCode" runat="server" Width="85px"></asp:TextBox>
        <asp:Image id="Image1" runat="server" ImageUrl="Validate.aspx"></asp:Image></div>
    <div>
        <asp:Button ID="Button1" runat="server" Text="确定" OnClick="Button1_Click" /></div>
    <div class="text">
        <asp:Label ID="Message" runat="server" ></asp:Label></div>
    </div>
    </form>
</body>
</html>
-------------------------register.aspx.cs-------------------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;
namespace MyRegister
{
    public partial class Register : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            string checkcode = CheckCode.Text;
            //Response.Write(Session["VNum"]);
            if (checkcode == Session["VNum"].ToString() || Session["VNum"].ToString()==null)//注意Session["VNum"].ToString()，必须加上ToString()，因//为Session["VNum"]是对象。
            Response.Redirect ("default.aspx");
            else
            Message.Text = "验证码错误或为空！";
        }
    }
}
---------------------------------其中注释的地方应特别注意

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;
using System.Drawing;
public partial class Default3 : System.Web.UI.Page
{
    private void Page_Load(object sender, System.EventArgs e)
    {
        this.CreateCheckCodeImage(GenerateCheckCode());
    }    #region Web 窗体设计器生成的代码
    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    private string GenerateCheckCode()
    {
        int number;
        char code;
        string checkCode = String.Empty;        System.Random random = new Random();        for (int i = 0; i < 5; i++)
        {
            number = random.Next();            if (number % 2 == 0)
                code = (char)('0' + (char)(number % 10));
            else
                code = (char)('A' + (char)(number % 26));            checkCode += code.ToString();
        }        Response.Cookies.Add(new HttpCookie("CheckCode", checkCode));        return checkCode;
    }    private void CreateCheckCodeImage(string checkCode)
    {
        if (checkCode == null || checkCode.Trim() == String.Empty)
            return;        System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22);
        Graphics g = Graphics.FromImage(image);        try
        {
            //生成随机生成器
            Random random = new Random();            //清空图片背景色
            g.Clear(Color.White);            //画图片的背景噪音线
            for (int i = 0; i < 25; i++)
            {
                int x1 = random.Next(image.Width);
                int x2 = random.Next(image.Width);
                int y1 = random.Next(image.Height);
                int y2 = random.Next(image.Height);                g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
            }            Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
            System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
            g.DrawString(checkCode, font, brush, 2, 2);            //画图片的前景噪音点
            for (int i = 0; i < 100; i++)
            {
                int x = random.Next(image.Width);
                int y = random.Next(image.Height);                image.SetPixel(x, y, Color.FromArgb(random.Next()));
            }            //画图片的边框线
            g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
            Response.ClearContent();
            Response.ContentType = "image/Gif";
            Response.BinaryWrite(ms.ToArray());
        }
        finally
        {
            g.Dispose();
            image.Dispose();
        }
    }
}

楼主用我的文章看看
《ASP.NET随机码生成示例》
http://www.cnblogs.com/heekui/archive/2007/01/06/613609.html示例工程下载
http://www.cnblogs.com/Files/heekui/RandCode.rar

http://www.51aspx.com/S/%e9%aa%8c%e8%af%81%e7%a0%81.aspx
http://www.51aspx.com/CV/SimpleValidateCode

调试易

谁给个验证码的完整代码谢谢!!!

解决方案 »