繁體中文当前位置: 首页 > 图文教程 > 网络编程 > ASP > 如何获知页面上的图象的实际尺寸？
- ASP
- 简单ASP论坛DIY
- 如何防止页面中的敏感信息被提取
- asp创建对象及中文显示解决技巧
- 基础开发入门级：JSP与ASP的比较
- 数据库受到限制怎么办？
- ASP初学者常犯的几个错误
- Asp定时执行操作、Asp定时读取数据库(网页定时操作详解)
- ASP优化：非常实用的ASP提速技巧五则
- ASP教程：解决ASP脚本运行超时的方法
- ASP安全：简单学习ASP连接数据库方法
- 简单一招用ASP实现对IE地址栏参数的判断
- asp控制xml数据库的6段非常的经典代码
- ASP进阶：验证身份证号是否正确的代码
- ASP教程：使用ASP生成图片彩色校验码
- ASP进阶：用ASP判断文件地址是否有效
- ASP进阶：用asp做的简单搜索引擎代码
- ASP实例 挂QQ的网页源代码ASP/PHP
- ASP答疑 解决ASP脚本运行超时的方法
- 轻轻松松破解开别人ASP木马密码的方法
- 用ASP操作Access数据库 ADOX的使用
ASP 中的 如何获知页面上的图象的实际尺寸？
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-13 浏览: 74 ::
收藏到网摘: n/a
下面两个文件：
<!--#include virtual="/intels/chunfeng/graphicdetect.asp"-->
<html>
<head>
<TITLE>图像尺寸</TITLE>
</head>
<body bgcolor="#FFFFFF">
<%
graphic="images/intels.gif"
HW = ReadImg(graphic)
Response.Write graphic & " Dimensions: " & HW(0) & "x" & HW(1)
& "<br>"
response.write "<img src=""/" & graphic & """"
response.write height=""" & HW(0) & """
response.write width=""" & HW(0) & "">"
%>
</body>
</html>
－－－－－－－－－－－－－－－－－－－－－－－－
graphicdetect.asp
<%
Dim HW
Function AscAt(s, n)
AscAt = Asc(Mid(s, n, 1))
End Function
Function HexAt(s, n)
HexAt = Hex(AscAt(s, n))
End Function
Function isJPG(fichero)
If inStr(uCase(fichero), ".JPG") <> 0 Then
isJPG = true
Else
isJPG = false
End If
End Function
Function isPNG(fichero)
If inStr(uCase(fichero), ".PNG") <> 0 Then
isPNG = true
Else
isPNG = false
End If
End Function
Function isGIF(fichero)
If inStr(uCase(fichero), ".GIF") <> 0 Then
isGIF = true
Else
isGIF = false
End If
End Function
Function isBMP(fichero)
If inStr(uCase(fichero), ".BMP") <> 0 Then
isBMP = true
Else
isBMP = false
End If
End Function
Function isWMF(fichero)
If inStr(uCase(fichero), ".WMF") <> 0 Then
isWMF = true
Else
isWMF = false
End If
End Function
Function isWebImg(f)
If isGIF(f) Or isJPG(f) Or isPNG(f) Or isBMP(f) Or isWMF(f)
Then
isWebImg = true
Else
isWebImg = true
End If
End Function
Function ReadImg(fichero)
If isGIF(fichero) Then
ReadImg = ReadGIF(fichero)
Else
If isJPG(fichero) Then
ReadImg = ReadJPG(fichero)
Else
If isPNG(fichero) Then
ReadImg = ReadPNG(fichero)
Else
If isBMP(fichero) Then
ReadImg = ReadPNG(fichero)
Else
If isWMF(fichero) Then
ReadImg = ReadWMF(fichero)
Else
ReadImg = Array(0,0)
End If
End If
End If
End If
End If
End Function
Function ReadJPG(fichero)
Dim fso, ts, s, HW, nbytes
HW = Array("","")
Set fso = CreateObject("Scripting.FileSystemObject")
Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1)
s = Right(ts.Read(167), 4)
HW(0) = HexToDec(HexAt(s,3) & HexAt(s,4))
HW(1) = HexToDec(HexAt(s,1) & HexAt(s,2))
ts.Close
ReadJPG = HW
End Function
Function ReadPNG(fichero)
Dim fso, ts, s, HW, nbytes
HW = Array("","")
Set fso = CreateObject("Scripting.FileSystemObject")
Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1)
s = Right(ts.Read(24), 8)
HW(0) = HexToDec(HexAt(s,3) & HexAt(s,4))
HW(1) = HexToDec(HexAt(s,7) & HexAt(s,8))
ts.Close
ReadPNG = HW
End Function
Function ReadGIF(fichero)
Dim fso, ts, s, HW, nbytes
HW = Array("","")
Set fso = CreateObject("Scripting.FileSystemObject")
Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1)
s = Right(ts.Read(10), 4)
HW(0) = HexToDec(HexAt(s,2) & HexAt(s,1))
HW(1) = HexToDec(HexAt(s,4) & HexAt(s,3))
ts.Close
ReadGIF = HW
End Function
Function ReadWMF(fichero)
Dim fso, ts, s, HW, nbytes
HW = Array("","")
Set fso = CreateObject("Scripting.FileSystemObject")
Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1)
s = Right(ts.Read(14), 4)
HW(0) = HexToDec(HexAt(s,2) & HexAt(s,1))
HW(1) = HexToDec(HexAt(s,4) & HexAt(s,3))
ts.Close
ReadWMF = HW
End Function
Function ReadBMP(fichero)
Dim fso, ts, s, HW, nbytes
HW = Array("","")
Set fso = CreateObject("Scripting.FileSystemObject")
Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1)
s = Right(ts.Read(24), 8)
HW(0) = HexToDec(HexAt(s,4) & HexAt(s,3))
HW(1) = HexToDec(HexAt(s,8) & HexAt(s,7))
ts.Close
ReadBMP = HW
End Function
Function isDigit(c)
If inStr("0123456789", c) <> 0 Then
isDigit = true
Else
isDigit = false
End If
End Function
Function isHex(c)
If inStr("0123456789ABCDEFabcdef", c) <> 0 Then
isHex = true
Else
ishex = false
End If
End Function
Function HexToDec(cadhex)
Dim n, i, ch, decimal
decimal = 0
n = Len(cadhex)
For i=1 To n
ch = Mid(cadhex, i, 1)
If isHex(ch) Then
decimal = decimal * 16
If isDigit(c) Then
decimal = decimal + ch
Else
decimal = decimal + Asc(uCase(ch)) - Asc("A")
End If
Else
HexToDec = -1
End If
Next
HexToDec = decimal
End Function
%>
评论 (0) All
