How do you read/write a Word document embedded in an OLE Object field in an
Access table with VB.NET?
I have an Access application where users are creating and editing Word
documents that are embedded in the database. I need to write a VB.NET
application to routinely read the contents of these Word documents. I've
written code that uses automation to open a Word document saved on disk and
read the contents of the document but I don't know how to do the same if the
document is inside a database.
8  2808 
Tim,
Mostly is that done using a blob field.
In an oledb file there is a header in that blob.
I have this sample for a picture in OleDB in a SQLserver, I assume that it
is the same for the word document in access however this does not have to be
true.
Dim arrImage() As Byte = DirectCast(rdr. Item("Photo"), Byte())
Dim ms1 As New System.IO.Memor yStream(arrImag e, 78, arrImage.Length - 78)
I hope this helps
(I am absolute not sure)
Cor
On Wed, 2 Feb 2005 11:35:36 +0100, "Cor Ligthert" <no************ @planet.nl> wrote:
¤ Tim,
¤
¤ Mostly is that done using a blob field.
¤ In an oledb file there is a header in that blob.
¤ I have this sample for a picture in OleDB in a SQLserver, I assume that it
¤ is the same for the word document in access however this does not have to be
¤ true.
¤
¤ Dim arrImage() As Byte = DirectCast(rdr. Item("Photo"), Byte())
¤ Dim ms1 As New System.IO.Memor yStream(arrImag e, 78, arrImage.Length - 78)
¤
¤ I hope this helps
¤ (I am absolute not sure)
The header offset position depends upon the type of document. For Word files I believe it's 40.
Paul ~~~ pc******@amerit ech.net
Microsoft MVP (Visual Basic)
78 nor 40 works. In fact I think its more than just a header offset. Doing a
binary compare of the file I created in word then inserted into the database
and out again they look very different. Some parts are similar but most
noticeably the end section of the original looks to be at the top of the
extracted document.
Any more clues? I've done a google but I most be using the wrong keywords.
Surely someone has been faced with this before me!
Tim
"Paul Clement" <Us************ ***********@sws pectrum.com> wrote in message
news:tg******** *************** *********@4ax.c om... On Wed, 2 Feb 2005 11:35:36 +0100, "Cor Ligthert"
<no************ @planet.nl> wrote:
¤ Tim,
¤
¤ Mostly is that done using a blob field.
¤ In an oledb file there is a header in that blob.
¤ I have this sample for a picture in OleDB in a SQLserver, I assume that
it ¤ is the same for the word document in access however this does not have
to be ¤ true.
¤
¤ Dim arrImage() As Byte = DirectCast(rdr. Item("Photo"), Byte())
¤ Dim ms1 As New System.IO.Memor yStream(arrImag e, 78, arrImage.Length -
78) ¤
¤ I hope this helps
¤ (I am absolute not sure)
The header offset position depends upon the type of document. For Word
files I believe it's 40.
Paul ~~~ pc******@amerit ech.net
Microsoft MVP (Visual Basic)
the magic number is 85!
"Tim Murphy" <ne**@msolution s.com.au> wrote in message
news:42******** *************** @un-2park-reader-01.sydney.pipen etworks.com.au. .. 78 nor 40 works. In fact I think its more than just a header offset. Doing
a binary compare of the file I created in word then inserted into the
database and out again they look very different. Some parts are similar but most
noticeably the end section of the original looks to be at the top of the
extracted document.
Any more clues? I've done a google but I most be using the wrong keywords.
Surely someone has been faced with this before me!
Tim
"Paul Clement" <Us************ ***********@sws pectrum.com> wrote in message
news:tg******** *************** *********@4ax.c om... On Wed, 2 Feb 2005 11:35:36 +0100, "Cor Ligthert" <no************ @planet.nl> wrote:
¤ Tim,
¤
¤ Mostly is that done using a blob field.
¤ In an oledb file there is a header in that blob.
¤ I have this sample for a picture in OleDB in a SQLserver, I assume
that it ¤ is the same for the word document in access however this does not have
to be ¤ true.
¤
¤ Dim arrImage() As Byte = DirectCast(rdr. Item("Photo"), Byte())
¤ Dim ms1 As New System.IO.Memor yStream(arrImag e, 78, arrImage.Length -
78) ¤
¤ I hope this helps
¤ (I am absolute not sure)
The header offset position depends upon the type of document. For Word
files I believe it's 40.
Paul ~~~ pc******@amerit ech.net
Microsoft MVP (Visual Basic)
Tim
Thanks for letting us know.
Cor
On Thu, 3 Feb 2005 07:28:19 +1100, "Tim Murphy" <ne**@msolution s.com.au> wrote:
¤ the magic number is 85!
¤
The Classic VB code I have searches for the "ÐÏ" character string (without the quotes) in order to
determine the offset. This might be a safer bet if you find that some Word documents have a
different offset location.
Paul ~~~ pc******@amerit ech.net
Microsoft MVP (Visual Basic)
Can you give us more details please. Source code would be even better.
"Paul Clement" <Us************ ***********@sws pectrum.com> wrote in message
news:6k******** *************** *********@4ax.c om... On Thu, 3 Feb 2005 07:28:19 +1100, "Tim Murphy" <ne**@msolution s.com.au>
wrote:
¤ the magic number is 85!
¤
The Classic VB code I have searches for the "ÐÏ" character string (without
the quotes) in order to determine the offset. This might be a safer bet if you find that some Word
documents have a different offset location.
Paul ~~~ pc******@amerit ech.net
Microsoft MVP (Visual Basic)
On Fri, 4 Feb 2005 08:33:33 +1100, "Tim Murphy" <ne**@msolution s.com.au> wrote:
¤ Can you give us more details please. Source code would be even better.
¤
I'll see if I can dig something up or port the existing Classic VB code.
Paul ~~~ pc******@amerit ech.net
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