读某目录下所有图片的宽度和高度
<%
Dim Conn,ConnStr,Rs,Sql,MyStream
ConnStr="DBQ=" + Server.Mappath("数据库.mdb") + ";DRIVER={Microsoft Access Driver (*.mdb)};"
Set Conn = Server.CreateObject("Adodb.Connection")
Conn.Open ConnStr
Class qswhImg
dim aso
Private Sub Class_Initialize
set aso=CreateObject("Adodb.Stream")
aso.Mode=3
aso.Type=1
aso.Open
End Sub
Private Sub Class_Terminate
set aso=nothing
End Sub
Private Function Bin2Str(Bin)
Dim I, Str
For I=1 to LenB(Bin)
clow=MidB(Bin,I,1)
if ASCB(clow)<128 then
Str = Str & Chr(ASCB(clow))
else
I=I+1
if I <= LenB(Bin) then Str = Str & Chr(ASCW(MidB(Bin,I,1)&clow))
end if
Next
Bin2Str = Str
End Function
Private Function Num2Str(num,base,lens)
'qiushuiwuhen (2002-8-12)
dim ret
ret = ""
while(num>=base)
ret = (num mod base) & ret
num = (num - num mod base)/base
wend
Num2Str = right(string(lens,"0") & num & ret,lens)
End Function
Private Function Str2Num(str,base)
'qiushuiwuhen (2002-8-12)
dim ret
ret = 0
for i=1 to len(str)
ret = ret *base + cint(mid(str,i,1))
next
Str2Num=ret
End Function
Private Function BinVal(bin)
'qiushuiwuhen (2002-8-12)
dim ret
ret = 0
for i = lenb(bin) to 1 step -1
ret = ret *256 + ascb(midb(bin,i,1))
next
BinVal=ret
End Function
Private Function BinVal2(bin)
'qiushuiwuhen (2002-8-12)
dim ret
ret = 0
for i = 1 to lenb(bin)
ret = ret *256 + ascb(midb(bin,i,1))
next
BinVal2=ret
End Function
Function getImageSize(filespec)
'qiushuiwuhen (2002-9-3)
dim ret(3)
aso.LoadFromFile(filespec)
bFlag=aso.read(3)
select case hex(binVal(bFlag))
case "4E5089":
aso.read(15)
ret(0)="PNG"
ret(1)=BinVal2(aso.read(2))
aso.read(2)
ret(2)=BinVal2(aso.read(2))
case "464947":
aso.read(3)
ret(0)="GIF"
ret(1)=BinVal(aso.read(2))
ret(2)=BinVal(aso.read(2))
case "535746":
aso.read(5)
binData=aso.Read(1)
sConv=Num2Str(ascb(binData),2 ,8)
nBits=Str2Num(left(sConv,5),2)
sConv=mid(sConv,6)
while(len(sConv)<nBits*4)
binData=aso.Read(1)
sConv=sConv&Num2Str(ascb(binData),2 ,8)
wend
ret(0)="SWF"
ret(1)=int(abs(Str2Num(mid(sConv,1*nBits+1,nBits),2)-Str2Num(mid(sConv,0*nBits+1,nBits),2))/20)
ret(2)=int(abs(Str2Num(mid(sConv,3*nBits+1,nBits),2)-Str2Num(mid(sConv,2*nBits+1,nBits),2))/20)
case "FFD8FF":
do
do: p1=binVal(aso.Read(1)): loop while p1=255 and not aso.EOS
if p1>191 and p1<196 then exit do else aso.read(binval2(aso.Read(2))-2)
do:p1=binVal(aso.Read(1)):loop while p1<255 and not aso.EOS
loop while true
aso.Read(3)
ret(0)="JPG"
ret(2)=binval2(aso.Read(2))
ret(1)=binval2(aso.Read(2))
case else:
if left(Bin2Str(bFlag),2)="BM" then
aso.Read(15)
ret(0)="BMP"
ret(1)=binval(aso.Read(4))
ret(2)=binval(aso.Read(4))
else
ret(0)=""
end if
end select
ret(3)="width=""" & ret(1) &""" height=""" & ret(2) &""""
getimagesize=ret
End Function
End Class
%>
使用范例(读某目录下所有图片的宽度):
<%
Set Rs=Server.CreateObject("Adodb.Recordset")
Sql="select * from FileTable where filewidth is null"
Rs.Open sql,conn,3,3
do while not Rs.eof
set qswh=new qswhImg
Set fso = CreateObject("Scripting.FileSystemObject")
Set f = fso.GetFolder(server.mappath(rs("savepath")))
Set fc = f.Files
For Each f1 in fc
ext=lcase(fso.GetExtensionName(f1.path))
select case ext
case "gif","bmp","jpg","png","jpe","jpeg":
arr=qswh.getImageSize(f1.path)
conn.execute("update FileInfo set filewidth="&arr(1)&",fileheight="&arr(2)&" where SavePath='"&rs("savepath")&"' and FileName='"&f1.name&"' and filewidth is null")
response.write "<br>" & arr(0) & " " & arr(3) & ":" & f1.name & " width:" & arr(1) & " height:" & arr(2)
end select
Next
Set fc=nothing
Set f=nothing
Set fso=nothing
Set qswh=nothing
Rs.movenext
loop
Rs.close
set Rs=nothing
conn.close
set conn=nothing
response.write "转换完成!"
%>