Solved

COleDocument double size

Posted on 1998-08-22
7
354 Views
Last Modified: 2013-11-20
I have a COleDocument, default from AppWizard, with a call to EnableCompoundFile() on the constructor.
When I save an existing document, the size is doubled. For example, a new name document save to 83k, and if I save it again, it got 163k and stay to this size on future save.
Does someone know why, and a workaround to always save like the first time (why the littlest size) ?
I cannot change the document format (not calling EnableCompoundFile() to get a flat document for example), because I absolutely need a compatibility with older documents.
I’ve try to force m_strPathName to empty before OnSaveDocument, or delete the file, but the document already open in my application is locked and cannot be created or deleted.

Thank you for your help.
0
Comment
Question by:dmunoz
  • 4
  • 2
7 Comments
 
LVL 8

Expert Comment

by:Answers2000
ID: 1321149
I think this is a consequence of OLE compound files rather than anything you're doing.

I know some M$ apps generate hug files.  PC World had a utility (command line) a while a go to recover space.
0
 

Author Comment

by:dmunoz
ID: 1321150
Yes, I think too that it's an OLE consequence.
But I cannot switch to flat (not OLE) because of my need to
keep compatibility with old files.

0
 
LVL 1

Expert Comment

by:Bridge
ID: 1321151
COleDocument is the base for documents that support visual editing. This requires extra functionality, primarily the presentation data associated with the OLE document. Seeing as this is a data is in the form of a metafile it will take up plenty of space.
0
Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

 

Author Comment

by:dmunoz
ID: 1321152
Ok Bridge, but it dont explain with the first save is smaller than the others. What I need is an explanation why this size is double, an possibly a way to work araound, and save next documents in the form of the first one.

0
 

Author Comment

by:dmunoz
ID: 1321153
Ok, this seem to be a hard one...
so, I double the price ;-))

Please help...

0
 
LVL 1

Accepted Solution

by:
Bridge earned 200 total points
ID: 1321154
Right lets try again.
The IStorage object within the OLE Document m_lpRootStg saves itself using the commit command within the OLEDOC1.cpp file. The parameter it uses is STGC_ONLYIFCURRENT. From the help this seems to be a 'safe' commit which preservers data. To avoid this the STGC_OVERWRITE should be used instead.
0
 

Author Comment

by:dmunoz
ID: 1321155
Thank you Bridge.
Your answer perfectly fit my need.

0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
function returning CString in a regular win32 DLL 8 176
Process filename extension 3 184
Detect CR LF to each line 12 159
ffmpeg - "rtsp://...... Operation not permitted" 4 80
Introduction: Ownerdraw of the grid button.  A singleton class implentation and usage. Continuing from the fifth article about sudoku.   Open the project in visual studio. Go to the class view – CGridButton should be visible as a class.  R…
Introduction: Hints for the grid button.  Nested classes, templated collections.  Squash that darned bug! Continuing from the sixth article about sudoku.   Open the project in visual studio. First we will finish with the SUD_SETVALUE messa…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

774 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