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ChaosSea验证码0.20版

2008-03-28 11:51  咒语  阅读(881)  评论(2编辑  收藏  举报
演示地址:http://max.cszi.com/VerifyCode.aspx

ChaosSea验证码0.20版

 

功能说明:
1.  可自定义字体
2.  可自定义最大字号
3.  可自定义随机旋转的角度
4.  可自定义前景随机噪色量
5.  可外部生成随机码,由VerifyCode类处理成图片
6.  可自定义数字与英文字母随机出现的比率
7.  可自定义验证码长度
8.  可自定义验证码背景色
9.  可自定义验证码色彩(噪点色同验证码色一致)
10.  可自定义字体

------------------------------
本人觉得用上随机角度就行了,不用前景噪点,因为这个东东会耗一定的资源

 

  1using  System;    
  2using  System.Collections.Generic;    
  3using  System.Web;    
  4using  System.Web.UI;    
  5using  System.Web.UI.WebControls;    
  6using  System.Web.UI.WebControls.WebParts;    
  7using  System.Web.UI.HtmlControls;    
  8   
  9using  System.IO;    
 10using  System.Drawing;    
 11   
 12   
 13namespace  CS.Common.Utility    
 14{    
 15        ///  <summary>    
 16        ///  Chaos验证码    
 17        ///  FileName                        :        VerifyCode.cs          
 18        ///  Verion                          :              0.20    
 19        ///  Author                          :              zhouyu   http://max.cszi.com    
 20        ///  Update                        :              2007-10-10    
 21        ///  Description            :              验证码随机旋转一定角度,可使用前景色,背景色效果不大就不用了    
 22        ///  </summary>    

 23        public  class  VerifyCode    
 24        {    
 25   
 26                private  int  _length  =  4;                        //验证码长度    
 27                private  int  _fontSize  =  18;              //字体最大尺寸    
 28                private  int  _border  =  0;                      //边框,0时没有连框    
 29                private  Color  _backgroundColor  =  Color.AliceBlue;      //背景色    
 30                private  Color  _fontColor  =  Color.Blue;          //验证码色    
 31                private  int  _rateNumber  =  10;              //验证码中的数字出现机率  ,越大出现的数字机率越大    
 32                private  string  _randomChars;              //随机生成的验证码    
 33                private  int  _randomAngle  =  40;              //随机码的旋转角度    
 34                private  string  _fontFamily  =  "Verdana";        //字体    
 35                private  int  _chaosNumber  =  0;                //噪点数量  ,0  时不用    
 36   
 37                private  Random  random  =  new  Random();    //随机种子,公用    
 38   
 39                public  VerifyCode()    
 40                {    
 41                          
 42                }
    
 43   
 44                ///  <summary>    
 45                ///  重载一  :噪点    
 46                ///  </summary>    
 47                ///  <param  name="chaosNumber"></param>    

 48                public  VerifyCode(int  chaosNumber)    
 49                {    
 50                        _chaosNumber  =  chaosNumber;    
 51                }
    
 52   
 53                ///  <summary>    
 54                ///  重载二:长度,噪点    
 55                ///  </summary>    
 56                ///  <param  name="length"></param>    
 57                ///  <param  name="chaosNumber"></param>    

 58                public  VerifyCode(int  length,  int  chaosNumber)    
 59                {    
 60                        _length  =  length;    
 61                        _chaosNumber  =  chaosNumber;    
 62                }
    
 63   
 64                ///  <summary>    
 65                ///  重载三:长度,噪点,数字机率    
 66                ///  </summary>    
 67                ///  <param  name="length"></param>    
 68                ///  <param  name="chaosNumber"></param>    
 69                ///  <param  name="rate">越大,生成的随机码中数字占的比例越多</param>    

 70                public  VerifyCode(int  length,  int  chaosNumber,  int  rate)    
 71                {    
 72                        _length  =  length;    
 73                        _chaosNumber  =  chaosNumber;    
 74                        _rateNumber  =  rate;    
 75                }
   
 76  
 77  
 78                .Length  验证码长度(默认4个)     
 85  
 86                .FontSize  字体最大尺寸(默认18)     
 93  
 94                .Border  边框(默认0  没有连框)   
101  
102                .BackgroundColor  自定义背景色(默认Color.AliceBlue)   
109  
110                .FontColor  验证码色(默认Color.Blue)   
117  
118                .RandomCode    随机生成的验证码   
125  
126                .RateNumber  验证码中的数字出现机率,越大出现的数字机率越大(默认10)   
133  
134                .RandomAngle  随机码的旋转角度(默认40度)   
141  
142                .FontFamily  字体   
149  
150                .ChaosNumber  噪点数量(默认值为2)    
157   
158   
159   
160                ///  <summary>    
161                ///  生成随机验证码    
162                ///  </summary>    

163                private  void  CreateCode()    
164                {    
165                        //有外部输入验证码时不用产生,否则随机生成    
166                        if  (!string.IsNullOrEmpty(_randomChars))    
167                        {  return;  }    
168   
169                        char  code;    
170                        for  (int  i  =  0;  i  <  _length;  i++)    
171                        {    
172                                int  rand  =  random.Next();    
173                                if  (rand  %  _rateNumber  ==  0)    
174                                {  code  =  (char)('A'  +  (char)(rand  %  26));  }    
175                                else   
176                                {  code  =  (char)('0'  +  (char)(rand  %  10));  }    
177                                _randomChars  +=  code.ToString();    
178                        }
    
179                }
    
180   
181   
182                ///  <summary>    
183                ///  背景噪点生成    
184                ///  </summary>    
185                ///  <param  name="graph"></param>    

186                private  void    CreateBackgroundChaos(Bitmap  map,Graphics  graph)    
187                {    
188                        Pen  blackPen  =  new  Pen(Color.Azure,  0);    
189                        for  (int  i  =  0;  i  <  map.Width  *  2;  i++)    
190                        {    
191                                int  x  =  random.Next(map.Width);    
192                                int  y  =  random.Next(map.Height);    
193                                graph.DrawRectangle(blackPen,  x,  y,  1,  1);    
194                        }
    
195                }
    
196   
197                ///  <summary>    
198                ///  前景色噪点    
199                ///  </summary>    
200                ///  <param  name="map"></param>    

201                private  void  CreaetForeChaos(Bitmap  map)    
202                {    
203                        for  (int  i  =  0;  i  <  map.Width  *  _chaosNumber;  i++)    
204                        {    
205                                int  x  =  random.Next(map.Width);    
206                                int  y  =  random.Next(map.Height);    
207                                //map.SetPixel(x,  y,  Color.FromArgb(random.Next(300)));    
208                                map.SetPixel(x,  y,  _fontColor);    
209                        }
    
210                }
    
211   
212   
213                ///  <summary>    
214                ///  创建随机码图片    
215                ///  </summary>    
216                ///  <param  name="context"></param>    

217                public  void  CreateImage(HttpContext  context)    
218                {    
219                        CreateCode();          //创建验证码    
220   
221                        Bitmap  map  =  new  Bitmap((int)(_randomChars.Length  *  15),  24);                            //创建图片背景    
222                        Graphics  graph  =  Graphics.FromImage(map);    
223                        //graph.FillRectangle(new  SolidBrush(Color.Black),  0,  0,  map.Width+1,  map.Height+1);          //填充一个有背景的矩形    
224                            
225                        //if  (_border  >  0)  //画一个边框    
226                        //{    
227                        //        graph.DrawRectangle(new  Pen(Color.Black,  0),  0,  0,  map.Width  -  _border,  map.Height  -  _border);    
228                        //}            
229                        //graph.SmoothingMode  =  System.Drawing.Drawing2D.SmoothingMode.AntiAlias;        //模式    
230   
231                        graph.Clear(_backgroundColor);              //清除画面,填充背景    
232                        SolidBrush  brush  =  new  SolidBrush(_fontColor);    //画笔    
233                        Point  dot  =  new  Point(12,  12);    
234   
235                        //CreateBackgroundChaos(map,graph);              //背景噪点生成    
236   
237                        CreaetForeChaos(map);              //前景色噪点    
238   
239                        //文字距中    
240                        StringFormat  format  =  new  StringFormat(StringFormatFlags.NoClip);    
241                        format.Alignment  =  StringAlignment.Center;    
242                        format.LineAlignment  =  StringAlignment.Center;    
243   
244                        //验证码旋转,防止机器识别    
245                        char[]  chars  =  _randomChars.ToCharArray();            //拆散字符串成单字符数组    
246                        for  (int  i  =  0;  i  <  chars.Length;  i++)    
247                        {    
248                                Font  fontstyle  =  new  Font(_fontFamily,  random.Next(_fontSize  -  3,  _fontSize),  FontStyle.Regular);            //字体样式    
249                                float  angle  =  random.Next(-_randomAngle,  _randomAngle);            //转动的度数    
250   
251                                graph.TranslateTransform(dot.X,  dot.Y);          //移动光标到指定位置    
252                                graph.RotateTransform(angle);    
253                                graph.DrawString(chars[i].ToString(),  fontstyle,  brush,  -2,  2,  format);    
254                                graph.RotateTransform(-angle);                    //转回去    
255                                graph.TranslateTransform(2,  -dot.Y);          //移动光标到指定位置    
256                        }
    
257                          
258   
259                        //生成图片    
260                        MemoryStream  ms  =  new  MemoryStream();    
261                        map.Save(ms,  System.Drawing.Imaging.ImageFormat.Gif);    
262                        context.Response.ClearContent();    
263                        context.Response.ContentType  =  "image/gif";    
264                        context.Response.BinaryWrite(ms.ToArray());    
265                        graph.Dispose();    
266                        map.Dispose();    
267   
268                }
    
269   
270   
271   
272   
273   
274        }
    
275   
276   
277   
278}
    
279

 

 使用方法:

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  CS.Common.Utility;    
   
namespace  Test    
{    
        
public  partial  class  Vcode  :  System.Web.UI.Page    
        
{    
                
protected  void  Page_Load(object  sender,  EventArgs  e)    
                
{    
   
                        VerifyCode  vcode  
=  new  VerifyCode();    
   
                        vcode.CreateImage(
base.Context);    
   
                        Session[
"VerifyCode"]  =  vcode.RandomCode;    
   
                        
   
                }
    
        }
    
}
    

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