Can't delete Thumbnail Cache under Windows 7

This is a discussion on Can't delete Thumbnail Cache under Windows 7 within the Windows Programming forums, part of the Platform Specific Boards category; Hi, under Vista, i used to delete my Thumbnail Cache files : AppData\Local\Microsoft\Windows\Explorer\thumbcach e_32.db AppData\Local\Microsoft\Windows\Explorer\thumbcach e_96.db AppData\Local\Microsoft\Windows\Explorer\thumbcach e_256.db AppData\Local\Microsoft\Windows\Explorer\thumbcach e_1024.db ...

  1. #1
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    Question Can't delete Thumbnail Cache under Windows 7

    Hi,

    under Vista, i used to delete my Thumbnail Cache files :

    AppData\Local\Microsoft\Windows\Explorer\thumbcach e_32.db
    AppData\Local\Microsoft\Windows\Explorer\thumbcach e_96.db
    AppData\Local\Microsoft\Windows\Explorer\thumbcach e_256.db
    AppData\Local\Microsoft\Windows\Explorer\thumbcach e_1024.db
    AppData\Local\Microsoft\Windows\Explorer\thumbcach e_idx.db
    AppData\Local\Microsoft\Windows\Explorer\thumbcach e_sr.db
    with the following Code:

    Code:
    if ( !DeleteFile( filesC.Item( i ) ) )
    {
    	DWORD dwAttC = GetFileAttributes( filesC.Item( i ) );
    	dwAttC &= ~( FILE_ATTRIBUTE_READONLY );
    
    	SetFileAttributes( filesC.Item( i ), dwAttC );
    
    	DeleteFile( filesC.Item( i ) );
    }
    after restarting explorer.exe, those files are automatically regenerated.

    Under Windows 7 this is not the case, those files are not deleted or regenerated even after restarting the system.

    Am i missing something, or there is some way to notify explorer.exe to delete those files?


    Thanks in advance.

  2. #2
    and the hat of wrongness Salem's Avatar
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    I'm guessing you need to look at the return result of DeleteFile() and generate some kind of meaningful error message.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
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    Under Vista:

    -The first call to DeleteFile returns 0, and GetLastError returns ERROR_ACCESS_DENIED.
    -After changing the file attribute, DeleteFile returns non-zero value(success).
    -Thumbnails are regenerated automatically after restarting explorer.exe.

    Under Windows 7:

    -The first call to DeleteFile returns 0, and GetLastError returns ERROR_ACCESS_DENIED.
    -After changing the file attribute, DeleteFile returns 0, and GetLastError returns again ERROR_ACCESS_DENIED.
    -Thumbnails are not deleted or regenerated even after restarting the System.

  4. #4
    and the hat of wrongness Salem's Avatar
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    Well there you go then - you have the answer.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  5. #5
    Unregistered User Yarin's Avatar
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    Under Windows 7 this is not the case, those files are not deleted or regenerated even after restarting the system.
    -Thumbnails are not deleted or regenerated even after restarting the System.
    I don't get it. If you can't delete the files in the first place, how would you know wether or not they get re-created??

    As for deleting them, try blanking out the file's security descriptor before deleting and see if it works.
    A class that doesn't overload all operators just isn't finished yet. -- SmugCeePlusPlusWeenie
    A year spent in artificial intelligence is enough to make one believe in God. -- Alan J. Perlis

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