Solved

Saving a TFileStream

Posted on 2004-08-09
3
375 Views
Last Modified: 2010-04-05
I am using a TFileStream, is there anyway to save the stream apart from uing free. I am opening the stream
    oStream := TFileStream.Create( sFilename, fmShareExclusive or fmOpenReadWrite );

I keep the file open so no one else can open it, the user needs to be able to click save at any time and I need to save all changes up to that point.

0
Comment
Question by:julianpointer
3 Comments
 
LVL 2

Expert Comment

by:wolsen
ID: 11759440
you could just create another file stream and copy that stream to it.
0
 
LVL 5

Expert Comment

by:Lukasz Lach
ID: 11760336
or you can use LockFile() function to protect the file from being written (or read) by other process...
0
 
LVL 17

Accepted Solution

by:
Wim ten Brink earned 125 total points
ID: 11760903
Well, when you write to the stream, it should be written to disk immediately. That's basic behaviour for filestreams... By using free, you also force the buffers to be written.  But in general these buffers are handled by Windows, not by the stream itself. You could try:

  FlushFileBuffers(oStream.Handle);

just in case...
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

948 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

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now