Solved

image width, height and size

Posted on 2002-07-02
3
317 Views
Last Modified: 2006-11-17
Hi,

How to check the images widht, height and size in asp code?

Please help.

Thanks.
0
Comment
Question by:ht055
3 Comments
 
LVL 51

Accepted Solution

by:
Ryan Chong earned 30 total points
ID: 7124057
0
 
LVL 2

Expert Comment

by:zombeen
ID: 7124296
ASPImage is anotyher very good component , used for this + a lot of other things
u shd get that one too from www.serverobjects.com
0
 
LVL 9

Expert Comment

by:AlfaNoMore
ID: 7126424
OR...

Sub getJPEGDimensions(ByVal filename, ByRef width, ByRef height)
     '// sets width and height to the values scooped from the JPEG referenced by filename
     '// Assumes filename supplies a full path (i.e. it has been MapPath'ed)

     Dim lBinPrefix
     Dim lLngStart
     Dim binaryData, objFS, objFile
     
     'filename = Server.MapPath(filename)
     Set objFS = Server.CreateObject("Scripting.FileSystemObject")
     
     Set objFile = objFS.OpenTextFile(filename)
     If Not objFile.AtEndOfStream Then
          binaryData = ChrB(Asc(objFile.Read(1)))
          While Not objFile.AtEndOfStream
                binaryData = binaryData & ChrB(Asc(objFile.Read(1)))
          Wend
     End If
     objFile.Close
     Set objFile = Nothing
     Set objFS = Nothing
     
     
     ' Prefix found before image dimensions          
     lBinPrefix = ChrB(&h00) & ChrB(&h11) & ChrB(&h08)
     
     ' Find the last prefix (so we don't confuse it with data)          
     lLngStart = 1
     Do
          If InStrB(lLngStart, binaryData, lBinPrefix) + 3 = 3 Then Exit Do
          lLngStart = InStrB(lLngStart, binaryData, lBinPrefix) + 3
     Loop
     ' If a prefix was found
     If Not lLngStart = 1 Then
          width = CLng("&h" & HexAt(lLngStart+2, binaryData) & HexAt(lLngStart+3, binaryData))
          height = CLng("&h" & HexAt(lLngStart, binaryData) & HexAt(lLngStart+1, binaryData))
     End If
End Sub


Function HexAt(ByRef pLngPosition, ByRef mStrBinaryData)
     If pLngPosition > LenB(mStrBinaryData) Or pLngPosition <= 0 Then Exit Function
     HexAt = Right("0" & Hex(AscB(MidB(mStrBinaryData, pLngPosition, 1))), 2)
End Function

0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Import csv files to MS SQL 5 85
CDO.Message not able to send attachement 5 32
FileUp - Classic ASP 5 20
href return to normal window 5 13
Hello, all! I just recently started using Microsoft's IIS 7.5 within Windows 7, as I just downloaded and installed the 90 day trial of Windows 7. (Got to love Microsoft for allowing 90 days) The main reason for downloading and testing Windows 7 is t…
This demonstration started out as a follow up to some recently posted questions on the subject of logging in: http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/Q_28634665.html and http://www.experts-exchange.com/Programming/…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question