用JPEG文件EXIF信息ASP版本（1）-ASP教程,ASP应用

前些天用bcb写了一个exifinfo的组件。其实用asp也可以实现。

用asp性能上要稍差一些，不过可以采取预读取形式存库，一张图片处理一次。

functions_exif.asp start

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<%

const tristateusedefault = -2

const tristatetrue = -1

const tristatefalse = 0

const forreading = 1

const forwriting = 2

const forappending = 8

const m_byte = 1

const m_string = 2

const m_short = 3

const m_long = 4

const m_rational = 5

const m_sbyte = 6

const m_undefined = 7

const m_sshort = 8

const m_slong = 9

const m_srational = 10

const m_single = 11

const m_double = 12

const exifoffset = "8769"

const makernote = "927c"

public exiflookup

set exiflookup = server.createobject("scripting.dictionary")