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Marshin

Read Thumb.db

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does anyone have any information on reading the Thumb.db files that are commonly found in folders with photos? I am looking to capture the image and display it. muttley


At last, after two thousand years of research, the illudium Q-36 explosive space modulator.Well, back to the old drawing board.

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Why would you want to display the pictures from it?? The file doesn't get cleaned when pictures are removed so you will see everything that has been in the folder since it was created, is that what you want??

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I am looking to get the thumbnail images from files that are not images them self, such as AutoCAD file (.dwg) or Solidwork files (.sldprt;.sldasm;.slddrw), but I have yet to see a successful way of getting the thumbnail information out of the files (I believe is stored in the meta data). so I am trying to see if there is another way I can get it.


At last, after two thousand years of research, the illudium Q-36 explosive space modulator.Well, back to the old drawing board.

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#4 ·  Posted (edited)

I am looking to get the thumbnail images from files that are not images them self, such as AutoCAD file (.dwg) or Solidwork files (.sldprt;.sldasm;.slddrw), but I have yet to see a successful way of getting the thumbnail information out of the files (I believe is stored in the meta data). so I am trying to see if there is another way I can get it.

That won't solve the problem of Thumb.db still containing information for non-existent files. That is files which have been deleted or moved. The info for those files still persists in Thumb.db unless you have deleted and rebuilt Thumb.db

You are probably better off to convert the file list to an array (_FileListToArray()) and then get the meta data of those files to find what you want.

Edited by GEOSoft

George

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#5 ·  Posted (edited)

Okay, maybe I should explain it fully. I have made a database and UI for it. I am looking to be able to read and display the thumbnail images of non-standard image files when a user searches for a given part number, which to my understanding can be found in the thumb.db file or in the meta date of the said file. I have yet to find a way to get and or display the thumbnail, any help on this would be great.

Edited by Marshin

At last, after two thousand years of research, the illudium Q-36 explosive space modulator.Well, back to the old drawing board.

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Anyone?


At last, after two thousand years of research, the illudium Q-36 explosive space modulator.Well, back to the old drawing board.

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I'm thinking instead of parsing the thumbs.db you could manually trigger the generation of a thumbnail through the shell interface:

IThumbnailCapture

IThumbnailCache

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Thank you. that does look like it will work well. muttley

Look like I need to do some reading.


At last, after two thousand years of research, the illudium Q-36 explosive space modulator.Well, back to the old drawing board.

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I'm thinking instead of parsing the thumbs.db you could manually trigger the generation of a thumbnail through the shell interface:

IThumbnailCapture

IThumbnailCache

How can you call Shell Interfaces and Methods from AutoIt? I was trying to use a method from the IKnownFolderManager interface, but you can't call the methods like dll functions with DllCall(). I'm afraid this is a little past my experience at the moment.

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Hi, GDI+ has an easy thumbnail generator, it returns a handle to an thumbnail image which you can use on your gui/ctrl/imagelist/savetofile.. whatever suites your needs..

Here's the really rough use of it, sorry I don't have the patient to make it pretty and safe atm...

; First link is to the GDI+ Class Image functions, this how I work out what the params are.
; http://msdn.microsoft.com/en-us/library/ms535394(VS.85).aspx
; Second Link is the GDI+ Flat Image functions, this how how I translated the call.
; http://msdn.microsoft.com/en-us/library/ms534041(VS.85).aspx
#include <GDIPlus.au3>

_GDIPlus_Startup()

; Load the image you want a thumbnail of ...
$hImage = _GDIPlus_ImageLoadFromFile(@WindowsDir & "\Web\Wallpaper\Ascent.jpg")

; pass $hImage to the the dllcall, the 100 and 100 is the Width and Height you want the thumbnail..
; if you use 0 and 0 for width and height then the thumbnail is generated at the default system size.
$aResult = DllCall($ghGDIPDll, "int", "GdipGetImageThumbnail", "hwnd", $hImage, "int", 100, "int", 100, "int*", 0, "ptr", 0, "ptr", 0) 

; I'm just saving as jpg, but you can use the thumbnail image handle any way you like. 
_GDIPlus_ImageSaveToFile($aResult[4], @ScriptDir & "\TestThumbnail.jpg")

; Clean up
_GDIPlus_ImageDispose($aResult[4])
_GDIPlus_ImageDispose($hImage)

_GDIPlus_Shutdown()

Cheers

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