C#产生随机验证码的代码
来源:互联网 发布:vscode c 插件 编辑:程序博客网 时间:2024/05/17 23:15
再次申明非本人原创。可以到网上下载ASPNETAJAXWeb.ValidateCode.dll直接使用
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Text;
using
System.Drawing.Drawing2D;
using
System.Drawing;
using
System.IO;
using
System.Drawing.Imaging;
public
partial
class
ValidateCode : System.Web.UI.Page
{
private
string
code;
private
const
int
ImageHeigth = 22;
//验证码图片的高度
private
const
double
ImageLengthBase = 12.5;
//验证码图片中每个字符的宽度
private
const
int
ImageLineNumber = 25;
//噪音线的数量
private
const
int
ImagePointNumber = 100;
//噪点的数量
private
int
length;
public
static
string
VALIDATECODEKEY;
//此处用来保存验证码到Session的Key的名称
//静态构造函数初始化验证码在Session中的Key名称
static
ValidateCode()
{
VALIDATECODEKEY =
"VALIDATECODEKEY"
;
}
//设置验证码的长度和内容
public
ValidateCode()
{
this
.length = 4;
this
.code =
string
.Empty;
}
/// <summary>
/// 产生随机的验证码并加入Session
/// </summary>
/// <param name="length">验证码长度</param>
/// <returns></returns>
public
string
CreateCode(
int
length)
{
if
(length <= 0)
{
return
string
.Empty;
}
Random random =
new
Random();
StringBuilder builder =
new
StringBuilder();
//产生随机的验证码并拼接起来
for
(
int
i = 0; i < length; i++)
{
builder.Append(random.Next(0, 10));
}
this
.code = builder.ToString();
this
.Session[VALIDATECODEKEY] =
this
.code;
return
this
.code;
}
/// <summary>
/// 根据长度产生验证码
/// 并将验证码画成图片
/// </summary>
/// <param name="length">验证码长度</param>
public
void
CreateValidateImage(
int
length)
{
this
.code =
this
.CreateCode(length);
this
.CreateValidateImage(
this
.code);
}
/// <summary>
/// 根据产生的验证码生成图片
/// </summary>
/// <param name="code">验证码</param>
public
void
CreateValidateImage(
string
code)
{
if
(!
string
.IsNullOrEmpty(code))
{
this
.Session[VALIDATECODEKEY] = code;
//初始化位图Bitmap对象,指定图片对象的大小(宽,高)
Bitmap image =
new
Bitmap((
int
)Math.Ceiling((
double
)(code.Length * ImageLengthBase)), ImageHeigth);
//初始化一块画布
Graphics graphics = Graphics.FromImage(image);
Random random =
new
Random();
try
{
int
num5;
graphics.Clear(Color.White);
//绘制噪音线
for
(num5 = 0; num5 < ImageLineNumber; num5++)
{
int
num = random.Next(image.Width);
int
num3 = random.Next(image.Height);
int
num2 = random.Next(image.Width);
int
num4 = random.Next(image.Height);
graphics.DrawLine(
new
Pen(Color.Silver), num, num3, num2, num4);
}
//验证码字体样式
Font font =
new
Font(
"Tahoma"
, 12, FontStyle.Italic | FontStyle.Bold);
LinearGradientBrush brush =
new
LinearGradientBrush(
new
Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f,
true
);
//绘制验证码到画布
graphics.DrawString(code, font, brush, (
float
)2, (
float
)2);
//绘制噪点
for
(num5 = 0; num5 < ImagePointNumber; num5++)
{
int
x = random.Next(image.Width);
int
y = random.Next(image.Height);
image.SetPixel(x, y, Color.FromArgb(random.Next()));
}
graphics.DrawRectangle(
new
Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
MemoryStream stream =
new
MemoryStream();
//保存图片
image.Save(stream, ImageFormat.Gif);
base
.Response.ClearContent();
base
.Response.ContentType =
"image/Gif"
;
base
.Response.BinaryWrite(stream.ToArray());
}
finally
{
graphics.Dispose();
image.Dispose();
}
}
}
protected
override
void
OnLoad(EventArgs e)
{
this
.CreateValidateImage(
this
.length);
}
// Properties
public
string
Code
{
get
{
return
this
.Code;
}
}
public
int
Length
{
get
{
return
this
.length;
}
set
{
this
.length = value;
}
}
}
0 0
- C#产生随机验证码的代码
- 产生随机的验证码
- 验证码的随机产生
- 产生随机图片验证的jsp代码
- 随机产生验证码 简洁代码块
- PIL 产生随机验证码代码实现
- 产生随机验证码
- 产生随机验证码
- 随机产生验证码
- 随机产生验证码
- 随机产生验证码
- C#小程序—随机产生验证码
- C#中随机验证码生成代码
- 随机验证码的代码
- JSP产生随机验证码
- 产生随机验证码(控制台)
- 自定义随机产生验证码
- 产生随机验证图片代码来自CNBlogsDottext10Beta2
- Qt 向硬盘写文档
- 五大洲总论
- STL内存处理工具
- 触发器+游标的应用
- python的*args和**kw
- C#产生随机验证码的代码
- Android PagerTabStrip和PagerTitleStrip的不同点
- 数字之魅:不要被阶乘吓倒
- JAVA学习总结二十三
- 在php中定义常量时,const与define的区别
- XMPP 学习笔记三 SmackAPI
- 文章标题
- mysql 合集
- 练习5-12 对程序entab和detab的功能做一些扩充,以接受下列缩写的命令:entab -m +n表示制表符从第m列开始,每隔n列停止