<%@ Page Language="VB" debug=true%> <%@ Import Namespace="system"%> <%@ Import Namespace="system.Drawing"%> <%@ Import Namespace="system.Drawing.Imaging"%> <%@ Import Namespace="system.IO"%> <script runat="server"> ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '' 附加码生产程序 附加码生产程序 附加码生产程序 附加码生产程序 '' '' '' ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '' '' '' 为 教 师 节 献 礼 '' '' '' '' 今天要写附加码验证程序,本来想偷懒,可在网上搜索了好久没有一断满意的代码, '' ''索性就自己写了这段代码,运行后觉得效果不错!不敢私藏,特拿来给大家分享!以此感 '' ''谢CSDN、以及在CSDN的高手们!! '' '' '' '' '' '' 望大家发表你尊贵的意见! '' '' '' '' [email protected] '' '' 2004年9月10日 '' '' '' ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' sub page_load(byval sender As Object,byval E As EventArgs) 'Font_Size'字体大小 intrger 'Char_Number'验证码的位数 intrger 'BackgroundColor'背景颜色 十六进制数的字符串 dim My_Stream as MemoryStream=Get_Images(20,50,"#000000") Show_image(My_Stream)'显示内存图像 My_Stream.Close()'关闭打开的流文件 end sub
'Font_Size'字体大小 intrger 'Char_Number'验证码的位数 intrger 'BackgroundColor'背景颜色 十六进制数的字符串 function Get_Images(Font_Size as integer,Char_Number as integer,BackgroundColor as string) as MemoryStream'把字符转换为图像,并且保存到内存流 dim image_w as integer=int(Font_Size*1.5)+Font_Size*Char_Number'这个数字在调用页面需要,你要自己算出明确的数值 注意注意注意注意!!!!! dim image_h as integer=int(2.5*Font_Size)'这个数字在调用页面需要,你要自己算出明确的数值 注意注意注意注意!!!!! dim Temp_Bitmap as Bitmap'封装GDI+位图 dim Temp_Graphics as Graphics'封装GDI+绘图面 dim Color_Back as Color=ColorTranslator.FromHtml(BackgroundColor)'背景颜色 Temp_Bitmap = new Bitmap(image_w, 5*image_h, PixelFormat.Format32bppRgb)'注意注 确定背景大小 Temp_Graphics = Graphics.FromImage(Temp_Bitmap) Temp_Graphics.FillRectangle(new SolidBrush(Color_Back),new Rectangle(0, 0,image_w, 5*image_h))'注意注 绘制背景 DIM Sesson_Company AS String=""'为了进行验证比较 dim n as integer for n= 0 to Char_Number-1 dim Show_Str as string=getChar()'要显示为图像的字符 Sesson_Company=Sesson_Company & Show_Str dim Show_Str_Font_Size as integer=Int(3 * Rnd()+(Font_Size-2))'字体随机大小 下波动2 dim Color_Font as Color= ColorTranslator.FromHtml(getColor())'字体随机颜色 dim Show_Font_Name as string=getFont()'字体 dim Show_Str_Font as Font=new Font(Show_Font_Name,Show_Str_Font_Size,FontStyle.Bold)'定义文本格式(字体,字号,粗体) Temp_Graphics.DrawString(Show_Str, Show_Str_Font, new SolidBrush(Color_Font), int(Font_Size/2)+n*Font_Size, Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 next session("imagenumber")=LCase(trim(Sesson_Company))'保存到session便于调用的页面比较 '不区分大小写 Font_Size=Font_Size*4 image_h=int(2.5*Font_Size) Temp_Graphics.DrawString("欢", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+0*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("迎", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+1*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("使", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+2*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("用", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+3*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("! ", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+4*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("请", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+5*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("按", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+6*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("F5", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+7*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("键", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+8*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 Temp_Graphics.DrawString("!", new Font(getFont1(),Int(3 * Rnd()+(Font_Size-2)),FontStyle.Bold), new SolidBrush(ColorTranslator.FromHtml(getColor())), int(Font_Size/5+9*1.3*Font_Size), int(image_h/4)+Int(image_h*0.125 * Rnd()+image_h*0.08))'绘出字符 '绘字符的Y方向下波动+4 dim Temp_Stream as MemoryStream=new MemoryStream() Temp_Bitmap.Save(Temp_Stream, ImageFormat.jpeg) Temp_Graphics.Dispose()'释放资源 Temp_Bitmap.Dispose()'释放资源 Temp_Stream.Close()'关闭打开的流文件 return Temp_Stream'返回流 end function
function Show_image(Show_Stream as MemoryStream)'显示内存图像 Response.ClearContent() Response.ContentType = "Image/Jpeg" Response.BinaryWrite(Show_Stream.ToArray()) Response.End() end function
function getChar() as string'获得随机字符 0-9 a-z A-Z Dim Char_array(5) Char_array(0) = chr(Int(10 * Rnd()+48)) Char_array(1) = chr(Int(26 * Rnd()+65)) Char_array(2) = chr(Int(26 * Rnd()+65)) Char_array(3) = chr(Int(26 * Rnd()+97)) Char_array(4) = chr(Int(26 * Rnd()+97)) return Char_array(Int(5 * Rnd())) end function
function getColor() as string'获得随机颜色 Dim int_a As integer Dim int_b As integer Dim int_c As integer int_a=Int(180 * Rnd()+20) int_b=Int(180 * Rnd()+20) int_c=Int(180 * Rnd()+20) if int_a>150 and int_b>150 and int_c>150 then int_a=Int(150 * Rnd()+20) return "#" & Hex(int_a) & Hex(int_b) & Hex(int_c) end function
function getFont() as string'获得随机字体 Dim font_array(7) font_array(0) = "Book Antiqua" font_array(1) = "Microsoft Sans Serif" font_array(2) = "Comic Sans MS" font_array(3) = "Comic Sans MS" font_array(4) = "Comic Sans MS" font_array(5) = "Comic Sans MS" font_array(6) = "Comic Sans MS" return font_array(Int(7 * Rnd())) end function
function getFont1() as string'获得随机字体 Dim font_array(10) font_array(0) = "华文行楷" font_array(1) = "隶书" font_array(2) = "华文彩云" font_array(3) = "方正舒体" font_array(4) = "华文彩云" font_array(5) = "方正舒体" font_array(6) = "华文彩云" font_array(7) = "方正舒体" font_array(8) = "楷体_GB2312" font_array(9) = "华文行楷" return font_array(Int(10 * Rnd())) end function ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ' 注 意 ' ' ' ' '把所有的代码保存为:ChrToImages.aspx --------->可以直接运行看效果 ' '在其它页面的调用方法:<img width=image_w height=image_h src="ChrToImages.aspx" align="absmiddle"> ' 'image_w、image_h,你要自己算出明确的数值,并注意session("imagenumber") ' ' ' ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' </script> 
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