用自己想要的字体来做 ASP 图片验证
哈～好久没有发文章了～
小驴～前一阵子换了工作，最近还不错，也比较有空～
不啰嗦，来说一下今天的主题～
因为工作的关系，最近需要使用ASP、ASP.NET的图片验证(而且不能使用组件)
ASP.NET本身有System.Drawing可以使用，直接把字体转成图档、绘制杂点、使用渐层...等不是难题
但是咧～ASP....就难了～网络上可以找到最多的范例，就底下这个吧～
01 <%
02 Call Com_CreatValidCode()
03
04 Sub Com_CreatValidCode()
05 Response.Expires = -9999
06 Response.AddHeader "Pragma","no-cache"
07 Response.AddHeader "cache-ctrol","no-cache"
08 Response.ContentType = "Image/BMP"
09 Randomize
10 Dim i, ii, iii
11 Const cAmount = 36
12 Const cCode = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
13 Dim vColorData(2)
14 a=CInt(Int(Rnd * 256))
15 b=CInt(Int(Rnd * 256))
16 c=CInt(Int(Rnd * 256))
17 vColorData(0) = ChrB(a) & ChrB(b) & ChrB(c) '随机产生颜色
18 vColorData(1) = ChrB(255) & ChrB(255) & ChrB(255) '白色
19 Dim vCode(4), vCodes
20 For i = 0 To 3
21 vCode(i) = Int(Rnd * cAmount) '随机产生0~35
22 vCodes = vCodes & Mid(cCode, vCode(i) + 1, 1) '取得对应符并串接
23 Next
24 session("CheckCode") = vCodes 'vCodes既为产生的字符串
25 Dim vNumberData(36) 'vNumberData(0)对应符0的图像 'vNumberData(10)对应符10的图像
26 vNumberData(0) = "1110000111110111101111011110111101001011110100101111010010111101001011110111101111011110111110000111"
27 vNumberData(1) = "1111011111110001111111110111111111011111111101111111110111111111011111111101111111110111111100000111"
28 vNumberData(2) = "1110000111110111101111011110111111111011111111011111111011111111011111111011111111011110111100000011"
29 vNumberData(3) = "1110000111110111101111011110111111110111111100111111111101111111111011110111101111011110111110000111"
30 vNumberData(4) = "1111101111111110111111110011111110101111110110111111011011111100000011111110111111111011111111000011"
31 vNumberData(5) = "1100000011110111111111011111111101000111110011101111111110111111111011110111101111011110111110000111"
32 vNumberData(6) = "1111000111111011101111011111111101111111110100011111001110111101111011110111101111011110111110000111"
33 vNumberData(7) = "1100000011110111011111011101111111101111111110111111110111111111011111111101111111110111111111011111"
34 vNumberData(8) = "1110000111110111101111011110111101111011111000011111101101111101111011110111101111011110111110000111"
35 vNumberData(9) = "1110001111110111011111011110111101111011110111001111100010111111111011111111101111011101111110001111"
36 vNumberData(10) = "1111011111111101111111101011111110101111111010111111101011111100000111110111011111011101111000100011"
37 vNumberData(11) = "1000000111110111101111011110111101110111110000111111011101111101111011110111101111011110111000000111"
38 vNumberData(12) = "1110000011110111101110111110111011111111101111111110111111111011111111101111101111011101111110001111"
39 vNumberData(13) = "1000001111110111011111011110111101111011110111101111011110111101111011110111101111011101111000001111"
40 vNumberData(14) = "1000000111110111101111011011111101101111110000111111011011111101101111110111111111011110111000000111"
41 vNumberData(15) = "1000000111110111101111011011111101101111110000111111011011111101101111110111111111011111111000111111"
42 vNumberData(16) = "1110000111110111011110111101111011111111101111111110111111111011100011101111011111011101111110001111"
43 vNumberData(17) = "1000100011110111011111011101111101110111110000011111011101111101110111110111011111011101111000100011"
44 vNumberData(18) = "1100000111111101111111110111111111011111111101111111110111111111011111111101111111110111111100000111"
45 vNumberData(19) = "1110000011111110111111111011111111101111111110111111111011111111101111111110111110111011111000011111"
46 vNumberData(20) = "1000100011110111011111011011111101011111110001111111010111111101101111110110111111011101111000100011"
47 vNumberData(21) = "1000111111110111111111011111111101111111110111111111011111111101111111110111111111011110111000000011"
48 vNumberData(22) = "1000100011110010011111001001111100100111110101011111010101111101010111110101011111010101111001010011"
49 vNumberData(23) = "1000100011110011011111001101111101010111110101011111010101111101100111110110011111011001111000110111"
50 vNumberData(24) = "1110001111110111011110111110111011111011101111101110111110111011111011101111101111011101111110001111"
51 vNumberData(25) = "1000000111110111101111011110111101111011110000011111011111111101111111110111111111011111111000111111"
52 vNumberData(26) = "1110001111110111011110111110111011111011101111101110111110111011111011101001101111011001111110001011"
53 vNumberData(27) = "1000001111110111011111011101111101110111110000111111010111111101101111110110111111011101111000110011"
54 vNumberData(28) = "1110000011110111101111011110111101111111111001111111111001111111111011110111101111011110111100000111"
55 vNumberData(29) = "1000000011101101101111110111111111011111111101111111110111111111011111111101111111110111111110001111"
56 vNumberData(30) = "1000100011110111011111011101111101110111110111011111011101111101110111110111011111011101111110001111"
57 vNumberData(31) = "1000100011110111011111011101111101110111111010111111101011111110101111111010111111110111111111011111"
58 vNumberData(32) = "1001010011110101011111010101111101010111110101011111001001111110101111111010111111101011111110101111"
59 vNumberData(33) = "1000100011110111011111101011111110101111111101111111110111111110101111111010111111011101111000100011"
60 vNumberData(34) = "1000100011110111011111011101111110101111111010111111110111111111011111111101111111110111111110001111"
61 vNumberData(35) = "1100000011110111011111111101111111101111111110111111110111111111011111111011111111101110111100000011"
62 '底下的程序 在产生 图档
63 Response.BinaryWrite ChrB(66) & ChrB(77) & ChrB(230) & ChrB(4) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(10) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(1) & ChrB(0)
64 Response.BinaryWrite ChrB(24) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(176) & ChrB(4) & ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0)
65 For i = 9 To 0 Step -1
66 For ii = 0 To 3
67 For iii = 1 To 10
68 'If Rnd * 99 + 1 <3 Then ' < 右方的数值越大 代表产生的图越看不清楚原本的字
69 ' Response.BinaryWrite vColorData(0) '使用随机产生的颜色
70 'Else
71 ' Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1))
72 'End If
73 '0 <= vCode(X) <= 35; 91~100 .. 81~90 ...... 1~10;
74 Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1))
75 Next
76 Next
77 Next
78 End Sub
79 %>
字体固定....大小固定....只能设定杂点....
那～因为系统没得选，就是ASP，但是要加入这个功能～
好吧那...小驴来弄一个，借用vb.net先产生字体字符串(vNumberData)，放到图片数组里面
再修改一下ASP的程序～现在....有渐层，前景杂点，背景杂线，字体边缘柔化，可以挑选自己想要的字体.....甚至使用中文字～
这是产生的图形 
哈～
这个呢～是用来产生vNumberData的程序画面～
最后小驴附上产生vNumberData的程序、asp网页，关于网页的修改里面有说明了～
有兴趣的大大请慢用～
ASP图片验证.rar