Solved

Delphi 6 with DBGrid

Posted on 2001-07-15
6
637 Views
Last Modified: 2010-04-06
Hell Experts

  I just installed delphi 6 Enterprise edition today
 
  and I'm testing dbexpress with oracle database, I added SQLConnection and SQLTable to connec to the database, and I added Dbgrid, and when I try to connect the dbgrid with datasource property it gave me this error "operation not allowed in unidirectional dataset"

  so what can I do for that?

Best regards
Mohammed Nasman
0
Comment
Question by:Mohammed Nasman
  • 2
  • 2
  • 2
6 Comments
 
LVL 17

Accepted Solution

by:
inthe earned 100 total points
ID: 6283667
0
 
LVL 21

Expert Comment

by:gemarti
ID: 6283669
I think you will have to use a TDataSet component capable of buffering returned data into memory if you want to use the DBGrid. Use DataSetProvider and ClientDataSet to accomplish this.
The DBExpress components do not buffer returned data into memory; they only return unidirectional cursors to the data.
0
 
LVL 22

Author Comment

by:Mohammed Nasman
ID: 6284830
Thanks guys

  But I would like to ask, which faster TSQLTable and TSQLQuery or TSQLClientDataSet ?

  and if I use TSQLClientDataSet will my application slow down?
0
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.

 
LVL 21

Expert Comment

by:gemarti
ID: 6285427
I think that anytime you start using resources your going to slow the system down.
0
 
LVL 17

Expert Comment

by:inthe
ID: 6286802
hi,
i dont know which is fastest(dont have)so my comment dont mean much ,though in my opinion they should both be fast because of the no buffering in memory,therefore also using less resources,if your upgrading an app my guess is it will be faster overall using any of the dbexpress comps.

er listening ..
0
 
LVL 22

Author Comment

by:Mohammed Nasman
ID: 6288710
Thanks guys for you help

 I will accept barry comment, but i will give gemarti also points for his help
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

Title # Comments Views Activity
Windows Drag & Drop Location 2 94
Printing problem 2 81
How to open a new windows chrome resized and disabled the toolbar? 3 83
Firemonkey DbLookupComboBox equivalent ? 2 38
Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
In this video I am going to show you how to back up and restore Office 365 mailboxes using CodeTwo Backup for Office 365. Learn more about the tool used in this video here: http://www.codetwo.com/backup-for-office-365/ (http://www.codetwo.com/ba…
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…

863 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

21 Experts available now in Live!

Get 1:1 Help Now