• 企业400电话
  • 微网小程序
  • AI电话机器人
  • 电商代运营
  • 全 部 栏 目

    企业400电话 网络优化推广 AI电话机器人 呼叫中心 网站建设 商标✡知产 微网小程序 电商运营 彩铃•短信 增值拓展业务
    asp无组件生成验证码 GIF图片格式
    复制代码 代码如下:

    %
    Option Explicit ' 显示声明
    Class Com_GifCode_Class
    '''''''''''''''''''''''''''''''''''''''''''''
    ' Author: Layen support@ssaw.net 84815733(QQ)
    ' Thanks: Laomi, Laomiao, NetRube
    ' 2006-01-02
    '''''''''''''''''''''''''''''''''''''''''''''
    Public Noisy, Count, Width, Height, Angle, Offset, Border
    Private Graph(), Margin(3)
    Private Sub Class_Initialize()
    Randomize
    Noisy = 16 ' 干扰点出现的概率
    Count = 4 ' 字符数量
    Width = 80 ' 图片宽度
    Height = 20 ' 图片高度
    Angle = 2 ' 角度随机变化量
    Offset = 20 ' 偏移随机变化量
    Border = 1 ' 边框大小
    End Sub
    Public Function Create()
    Const cCharSet = "123456789"
    Dim i, x, y
    Dim vValidCode : vValidCode = ""
    Dim vIndex
    ReDim Graph(Width-1, Height-1)
    For i = 0 To Count - 1
    vIndex = Int(Rnd * Len(cCharSet))
    vValidCode = vValidCode + Mid(cCharSet, vIndex+1 , 1)
    SetDraw vIndex, i
    Next
    Create = vValidCode
    End Function
    Sub SetDot(pX, pY)
    If pX * (Width-pX-1) >= 0 And pY * (Height-pY-1) >= 0 Then
    Graph(pX, pY) = 1
    End If
    End Sub
    Public Sub SetDraw(pIndex, pNumber)
    ' 字符数据
    Dim DotData(8)
    DotData(0) = Array(30, 15, 50, 1, 50, 100)
    DotData(1) = Array(1 ,34 ,30 ,1 ,71, 1, 100, 34, 1, 100, 93, 100, 100, 86)
    DotData(2) = Array(1, 1, 100, 1, 42, 42, 100, 70, 50, 100, 1, 70)
    DotData(3) = Array(100, 73, 6, 73, 75, 6, 75, 100)
    DotData(4) = Array(100, 1, 1, 1, 1, 50, 50, 35, 100, 55, 100, 80, 50, 100, 1, 95)
    DotData(5) = Array(100, 20, 70, 1, 20, 1, 1, 30, 1, 80, 30, 100, 70, 100, 100, 80, 100, 60, 70, 50, 30, 50, 1, 60)
    DotData(6) = Array(6, 26, 6, 6, 100, 6, 53, 100)
    DotData(7) = Array(100, 30, 100, 20, 70, 1, 30, 1, 1, 20, 1, 30, 100, 70, 100, 80, 70, 100, 30, 100, 1, 80, 1, 70, 100, 30)
    DotData(8) = Array(1, 80, 30, 100, 80, 100, 100, 70, 100, 20, 70, 1, 30, 1, 1, 20, 1, 40, 30, 50, 70, 50, 100, 40)
    Dim vExtent : vExtent = Width / Count
    Margin(0) = Border + vExtent * (Rnd * Offset) / 100 + Margin(1)
    Margin(1) = vExtent * (pNumber + 1) - Border - vExtent * (Rnd * Offset) / 100
    Margin(2) = Border + Height * (Rnd * Offset) / 100
    Margin(3) = Height - Border - Height * (Rnd * Offset) / 100
    Dim vStartX, vEndX, vStartY, vEndY
    Dim vWidth, vHeight, vDX, vDY, vDeltaT
    Dim vAngle, vLength
    vWidth = Int(Margin(1) - Margin(0))
    vHeight = Int(Margin(3) - Margin(2))
    ' 起始坐标
    vStartX = Int((DotData(pIndex)(0)-1) * vWidth / 100)
    vStartY = Int((DotData(pIndex)(1)-1) * vHeight / 100)
    Dim i, j
    For i = 1 To UBound(DotData(pIndex), 1)/2
    If DotData(pIndex)(2*i-2) > 0 And DotData(pIndex)(2*i) > 0 Then
    ' 终点坐标
    vEndX = (DotData(pIndex)(2*i)-1) * vWidth / 100
    vEndY = (DotData(pIndex)(2*i+1)-1) * vHeight / 100
    ' 横向差距
    vDX = vEndX - vStartX
    ' 纵向差距
    vDY = vEndY - vStartY
    ' 倾斜角度
    If vDX = 0 Then
    vAngle = Sgn(vDY) * 3.14/2
    Else
    vAngle = Atn(vDY / vDX)
    End If
    ' 两坐标距离
    If Sin(vAngle) = 0 Then
    vLength = vDX
    Else
    vLength = vDY / Sin(vAngle)
    End If
    ' 随机转动角度
    vAngle = vAngle + (Rnd - 0.5) * 2 * Angle * 3.14 * 2 / 100
    vDX = Int(Cos(vAngle) * vLength)
    vDY = Int(Sin(vAngle) * vLength)
    If Abs(vDX) > Abs(vDY) Then vDeltaT = Abs(vDX) Else vDeltaT = Abs(vDY)
    For j = 1 To vDeltaT
    SetDot Margin(0) + vStartX + j * vDX / vDeltaT, Margin(2) + vStartY + j * vDY / vDeltaT
    Next
    vStartX = vStartX + vDX
    vStartY = vStartY + vDY
    End If
    Next
    End Sub
    Public Sub Output()
    Response.Expires = -9999
    Response.AddHeader "pragma", "no-cache"
    Response.AddHeader "cache-ctrol", "no-cache"
    Response.ContentType = "image/gif"
    ' 文件类型
    Response.BinaryWrite ChrB(Asc("G")) ChrB(Asc("I")) ChrB(Asc("F"))
    ' 版本信息
    Response.BinaryWrite ChrB(Asc("8")) ChrB(Asc("9")) ChrB(Asc("a"))
    ' 逻辑屏幕宽度
    Response.BinaryWrite ChrB(Width Mod 256) ChrB((Width \ 256) Mod 256)
    ' 逻辑屏幕高度
    Response.BinaryWrite ChrB(Height Mod 256) ChrB((Height \ 256) Mod 256)
    Response.BinaryWrite ChrB(128) ChrB(0) ChrB(0)
    ' 全局颜色列表
    Response.BinaryWrite ChrB(255) ChrB(255) ChrB(255)
    Response.BinaryWrite ChrB(0) ChrB(85) ChrB(255)
    ' 图象标识符
    Response.BinaryWrite ChrB(Asc(","))
    Response.BinaryWrite ChrB(0) ChrB(0) ChrB(0) ChrB(0)
    ' 图象宽度
    Response.BinaryWrite ChrB(Width Mod 256) ChrB((Width \ 256) Mod 256)
    ' 图象高度
    Response.BinaryWrite ChrB(Height Mod 256) ChrB((Height \ 256) Mod 256)
    Response.BinaryWrite ChrB(0) ChrB(7) ChrB(255)
    Dim x, y, i : i = 0
    For y = 0 To Height - 1
    For x = 0 To Width - 1
    If Rnd Noisy / 100 Then
    Response.BinaryWrite ChrB(1-Graph(x, y))
    Else
    If x * (x-Width) = 0 Or y * (y-Height) = 0 Then
    Response.BinaryWrite ChrB(Graph(x, y))
    Else
    If Graph(x-1, y) = 1 Or Graph(x, y) Or Graph(x, y-1) = 1 Then
    Response.BinaryWrite ChrB(1)
    Else
    Response.BinaryWrite ChrB(0)
    End If
    End If
    End If
    If (y * Width + x + 1) Mod 126 = 0 Then
    Response.BinaryWrite ChrB(128)
    i = i + 1
    End If
    If (y * Width + x + i + 1) Mod 255 = 0 Then
    If (Width*Height - y * Width - x - 1) > 255 Then
    Response.BinaryWrite ChrB(255)
    Else
    Response.BinaryWrite ChrB(Width * Height Mod 255)
    End If
    End If
    Next
    Next
    Response.BinaryWrite ChrB(128) ChrB(0) ChrB(129) ChrB(0) ChrB(59)
    End Sub
    End Class
    Dim mCode
    Set mCode = New Com_GifCode_Class
    Session("GetCode") = mCode.Create()
    mCode.Output()
    Set mCode = Nothing
    %>
    您可能感兴趣的文章:
    • asp.net下中文验证码,免费开源代码
    • asp.net(C#) 生成随机验证码的代码
    • ASP.net 验证码实现代码(C#)
    • Asp.net(C#)实现验证码功能代码
    • asp.net 简单验证码验证实现代码
    • asp.net 验证码生成和刷新及验证
    • asp最简单的生成验证码代码
    • ASP.NET中的无刷新验证码的开发(完整代码)
    • asp.net ajax实现无刷新验证码
    • asp.net 图片验证码的HtmlHelper
    • asp.net生成验证码(纯数字)
    • asp.net中3种验证码示例(实现代码)(数字,数字字母混和,汉字)
    • ASP.NET MVC验证码功能实现代码
    • asp.net验证码的简单制作
    • ASP实现加法验证码
    上一篇:提高ASP页面执行效率的方法分析
    下一篇:asp终极防范SQL注入漏洞
  • 相关文章
  • 

    © 2016-2020 巨人网络通讯 版权所有

    《增值电信业务经营许可证》 苏ICP备15040257号-8

    asp无组件生成验证码 GIF图片格式 asp,无,组件,生成,验证,码,