通过Adodb.Stream取得图像(BMP JPG PNG GIF SWF)的高度和宽度

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 qswh=new qswhImg