(轉)生成各種類型的驗證碼的類

古城微笑少年丶 2022-08-25 05:14 164阅读 0赞

該類可生成各種類型任意長度的驗證碼:數字,數字,字母,數字與字母,漢字,圖片.

using  System;  
 using  System.Drawing;  
 using  System.Drawing.Imaging;  
 using  System.Web.UI;  
 using  System.Drawing.Drawing2D;  
 using  System.IO;  
 using  System.Text;  
 namespace  JalisWeb  
\{  
 ///  <summary>   
 ///  生成验证码的类  
 ///  </summary>   
  public  class  ValidateNumber  
\{  
 public  ValidateNumber()  
\{  
\}  
 ///  <summary>   
 ///  验证码的最大长度  
 ///  </summary>   
  public  int  MaxLength  
\{  
 get  \{  return  10 ; \}  
\}  
 ///  <summary>   
 ///  验证码的最小长度  
 ///  </summary>   
  public  int  MinLength  
\{  
 get  \{  return  1 ; \}  
\}  
 ///  <summary>   
 ///  生成验证码  
 ///  </summary>   
 ///  <param name="length"> 指定验证码的长度 </param>   
 ///  <returns></returns>   
  public  string  CreateValidateNumber( int  length)  
\{  
 int \[\] randMembers  =  new  int \[length\];  
 int \[\] validateNums  =  new  int \[length\];  
 string  validateNumberStr  =  "" ;  
 // 生成起始序列值   
  int  seekSeek  =  unchecked (( int )DateTime.Now.Ticks);  
Random seekRand  =  new  Random(seekSeek);  
 int  beginSeek  =  ( int )seekRand.Next( 0 , Int32.MaxValue  \-  length  \*  10000 );  
 int \[\] seeks  =  new  int \[length\];  
 for  ( int  i  =  0 ; i  <  length; i \++ )  
\{  
beginSeek  \+=  10000 ;  
seeks\[i\]  =  beginSeek;  
\}  
 // 生成随机数字   
  for  ( int  i  =  0 ; i  <  length; i \++ )  
\{  
Random rand  =  new  Random(seeks\[i\]);  
 int  pownum  =  1  \*  ( int )Math.Pow( 10 , length);  
randMembers\[i\]  =  rand.Next(pownum, Int32.MaxValue);  
\}  
 // 抽取随机数字   
  for  ( int  i  =  0 ; i  <  length; i \++ )  
\{  
 string  numStr  =  randMembers\[i\].ToString();  
 int  numLength  =  numStr.Length;  
Random rand  =  new  Random();  
 int  numPosition  =  rand.Next( 0 , numLength  \-  1 );  
validateNums\[i\]  =  Int32.Parse(numStr.Substring(numPosition,  1 ));  
\}  
 // 生成验证码   
  for  ( int  i  =  0 ; i  <  length; i \++ )  
\{  
validateNumberStr  \+=  validateNums\[i\].ToString();  
\}  
 return  validateNumberStr;  
\}  
  
 ///  <summary>   
 ///  生成验证码字节数组(汉字)  
 ///  </summary>   
 ///  <param name="length"> 指定验证码的长度 </param>   
 ///  <returns> object\[\]  </returns>   
  private  object \[\] CreateValidateCode( int  length)  
\{  
 // 定义一个字符串数组储存汉字编码的组成元素    
  string \[\] rBase  =  new  String\[ 16 \] \{  " 0 " ,  " 1 " ,  " 2 " ,  " 3 " ,  " 4 " ,  " 5 " ,  " 6 " ,  " 7 " ,  " 8 " ,  " 9 " ,  " a " ,  " b " ,  " c " ,  " d " ,  " e " ,  " f "  \};  
  
Random rnd  =  new  Random();  
  
 // 定义一个object数组用来    
  object \[\] bytes  =  new  object \[length\];  
  
 /\*\*/   
 /\*\*/   
 /\*\*/   
 /\* 每循环一次产生一个含两个元素的十六进制字节数组，并将其放入bject数组中  
每个汉字有四个区位码组成  
区位码第1位和区位码第2位作为字节数组第一个元素  
区位码第3位和区位码第4位作为字节数组第二个元素  
 \*/   
 for  ( int  i  =  0 ; i  <  length; i \++ )  
\{  
 // 区位码第1位    
  int  r1  =  rnd.Next( 11 ,  14 );  
 string  str\_r1  =  rBase\[r1\].Trim();  
  
 // 区位码第2位    
  rnd  =  new  Random(r1  \*  unchecked (( int )DateTime.Now.Ticks)  \+  i); // 更换随机数发生器的种子避免产生重复值    
  int  r2;  
 if  (r1  ==  13 )  
\{  
r2  =  rnd.Next( 0 ,  7 );  
\}  
 else   
\{  
r2  =  rnd.Next( 0 ,  16 );  
\}  
 string  str\_r2  =  rBase\[r2\].Trim();  
  
 // 区位码第3位    
  rnd  =  new  Random(r2  \*  unchecked (( int )DateTime.Now.Ticks)  \+  i);  
 int  r3  =  rnd.Next( 10 ,  16 );  
 string  str\_r3  =  rBase\[r3\].Trim();  
  
 // 区位码第4位    
  rnd  =  new  Random(r3  \*  unchecked (( int )DateTime.Now.Ticks)  \+  i);  
 int  r4;  
 if  (r3  ==  10 )  
\{  
r4  =  rnd.Next( 1 ,  16 );  
\}  
 else  if  (r3  ==  15 )  
\{  
r4  =  rnd.Next( 0 ,  15 );  
\}  
 else   
\{  
r4  =  rnd.Next( 0 ,  16 );  
\}  
 string  str\_r4  =  rBase\[r4\].Trim();  
  
 // 定义两个字节变量存储产生的随机汉字区位码    
  byte  byte1  =  Convert.ToByte(str\_r1  \+  str\_r2,  16 );  
 byte  byte2  =  Convert.ToByte(str\_r3  \+  str\_r4,  16 );  
 // 将两个字节变量存储在字节数组中    
  byte \[\] str\_r  =  new  byte \[\] \{ byte1, byte2 \};  
  
 // 将产生的一个汉字的字节数组放入object数组中    
  bytes.SetValue(str\_r, i);  
  
\}  
  
  
 return  bytes;  
  
\}  
  
 ///  <summary>   
 ///  生成验证码(汉字)  
 ///  </summary>   
 ///  <param name="length"> 长度 </param>   
 ///  <returns> string </returns>   
  public  string  CreateValidateNumberAndCC( int  length)  
\{  
Encoding gb  =  Encoding.GetEncoding( " gb2312 " );  
  
 // 调用函数产生length个随机中文汉字编码    
  object \[\] bytes  =  CreateValidateCode(length);  
  
 string  str  =  "" ;  
 for  ( int  i  =  0 ; i  <  length; i \++ )  
\{  
str  \+=  gb.GetString(( byte \[\])Convert.ChangeType(bytes\[i\],  typeof ( byte \[\])));  
\}  
  
 return  str;  
\}  
  
  
 ///  <summary>   
 ///  生成验证码(数字,字母)  
 ///  </summary>   
 ///  <param name="length"> 长度 </param>   
 ///  <returns> string </returns>   
  public  string  CreateValidateNumberAndLetter( int  length)  
\{  
 string  Vchar  =  " 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,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,w,x,y,z " ;  
 string \[\] VcArray  =  Vchar.Split( ' , ' );  
 string  VNum  =  "" ;  
Random random  =  new  Random();  
 for  ( int  i  =  1 ; i  <=  length; i \++ )  
\{  
 int  iNum  =  0 ;  
 while  ((iNum  =  Convert.ToInt32(VcArray.Length  \*  random.NextDouble()))  ==  VcArray.Length)  
\{  
iNum  =  Convert.ToInt32(VcArray.Length  \*  random.NextDouble());  
\}  
VNum  \+=  VcArray\[iNum\];  
 //  VNum += VcArray\[Convert.ToInt32(VcArray.Length\*random.NextDouble())\];   
  \}  
 return  VNum;  
\}  
  
  
 ///  <summary>   
 ///  创建验证码的图片  
 ///  </summary>   
 ///  <param name="containsPage"> 要输出到的page对象 </param>   
 ///  <param name="validateNum"> 验证码 </param>   
  public  void  CreateValidateGraphic(Page containsPage,  string  validateNum)  
\{  
  
Bitmap image  =  new  Bitmap(( int )Math.Ceiling(validateNum.Length  \*  21.5 ),  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);  
 // 画图片的干扰线   
  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.GreenYellow), x1, y1, x2, y2);  
\}  
Font font  =  new  Font( " Arial " ,  12 , (FontStyle.Bold  |  FontStyle.Italic));  
LinearGradientBrush brush  =  new  LinearGradientBrush( new  Rectangle( 0 ,  0 , image.Width, image.Height),  
Color.Blue, Color.Green,  1.2f ,  true );  
g.DrawString(validateNum, font, brush,  3 ,  2 );  
 // 画图片的前景干扰点   
  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.LightSeaGreen),  0 ,  0 , image.Width  \-  1 , image.Height  \-  1 );  
 // 保存图片数据   
  MemoryStream stream  =  new  MemoryStream();  
image.Save(stream, ImageFormat.Jpeg);  
 // 输出图片   
  containsPage.Response.Clear();  
containsPage.Response.ContentType  =  " image/jpeg " ;  
containsPage.Response.BinaryWrite(stream.ToArray());  
\}  
 finally   
\{  
g.Dispose();  
image.Dispose();  
\}  
\}  
  
  
 ///  <summary>   
 ///  得到验证码图片的长度  
 ///  </summary>   
 ///  <param name="validateNumLength"> 验证码的长度 </param>   
 ///  <returns></returns>   
  public  static  int  GetImageWidth( int  validateNumLength)  
\{  
 return  ( int )(validateNumLength  \*  12.5 );  
\}  
 ///  <summary>   
 ///  得到验证码的高度  
 ///  </summary>   
 ///  <returns></returns>   
  public  static  double  GetImageHeight()  
\{  
 return  22.5 ;  
\}  
\}  
\}

以上代碼,其中生成圖片的函數只是針對Web編程,如果要在winForm中也使用,則需要做一定修改,主要修改輸出部分,代碼如下:

///  <summary>   
 ///  创建验证码的图片  
 ///  </summary>   
 ///  <param name="pb"> 要输出到的PictureBox对象 </param>   
 ///  <param name="validateNum"> 验证码 </param>    
  public  void  CreateValidateGraphic(PictureBox pb, string  validateNum)  
\{  
Bitmap image  =  new  Bitmap(( int )Math.Ceiling(validateNum.Length  \*  21.5 ),  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);  
 // 画图片的干扰线   
  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.GreenYellow), x1, y1, x2, y2);  
\}  
Font font  =  new  Font( " Arial " ,  12 , (FontStyle.Bold  |  FontStyle.Italic));  
LinearGradientBrush brush  =  new  LinearGradientBrush( new  Rectangle( 0 ,  0 , image.Width, image.Height),  
Color.Blue, Color.Green,  1.2f ,  true );  
g.DrawString(validateNum, font, brush,  3 ,  2 );  
 // 画图片的前景干扰点   
  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.LightSeaGreen),  0 ,  0 , image.Width  \-  1 , image.Height  \-  1 );  
 // 保存图片数据   
  MemoryStream stream  =  new  MemoryStream();  
image.Save(stream, ImageFormat.Jpeg);  
 // 输出图片   
  pb.Image  =  image;  
\}  
 finally   
\{  
g.Dispose();  
\}  
\}

本文轉自: [http://hi.baidu.com/rocy520/blog/item/eb4edded6c15724e79f0554c.html][http_hi.baidu.com_rocy520_blog_item_eb4edded6c15724e79f0554c.html]

[http_hi.baidu.com_rocy520_blog_item_eb4edded6c15724e79f0554c.html]: http://hi.baidu.com/rocy520/blog/item/eb4edded6c15724e79f0554c.html