谁给个验证码的完整代码谢谢!!!
谁给个验证码的完整代码十分感谢!!!
[解决办法]
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;
}
[解决办法]
-------------------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
