Solved

Delphi XE4 ADORecordset - trouble setting the active connection

Posted on 2013-11-11
2
862 Views
Last Modified: 2013-11-13
Hi, Experts.  I'm new to Delphi XE4.  I have lots of years with Delphi 5, a little with Delphi 2006, but am trying to make the leap to XE4.

I have few Delphi 2006 windows service programs that run fine.  I'm trying to create a new one in XE4, based on one of my existing Delphi 2006 programs.

One change that happened somewhere between 2006 and XE4 is the _Recordset object's _Set_ActiveConnection now takes a parameter of IDispatch instead of string.

In my ignorance, I've simply changed the string parameter to IDispatch and tried typecasting.  (Don't laugh too long.)

I've read a bit of the help file on IDispatch and that gave me no better understanding.

What I'm trying to do in this program is read an encrypted ADO connection string from an INI file, and use that to make a connection to a SQL database to get a set of records that I have to process in the timer event of my service program.

The event log gives me the Microsoft equivalent to "you can't get there from here" when the service program gets to

MyRecordSet._Set_ActiveConnection(FConnectionString);  

// FConnectionString is a typecast IDispatch of a string from reading the ini file.

I'd sure appreciate some direction on how to set the connection string for an ado connection.

Thanks.
0
Comment
Question by:bjones8888
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 27

Accepted Solution

by:
Sinisa Vuk earned 500 total points
ID: 39640883
You can always create connection object and pass it to Set_ActiveConnection as is here:
aConnection := CoConnection.Create;
aConnection.Open(sConnectionString, '', '', -1);
recs.Set_ActiveConnection(aConnection);
....

Open in new window


if you van to stick with string....
connStr: OleVariant;
recs: _Record;
...
connStr := 'Provider...';
recs.Set_ActiveConnection(connStr);
....

Open in new window

0
 

Author Closing Comment

by:bjones8888
ID: 39646004
It seems to me like the older version of Delphi may have created the connection object "on the fly" if one wasn't specified.

In any event, I'm now successfully using a TAdoConnection object, setting its connection string, and setting Connected to True. Then I use TAdoQuery to do the record processing.

Thank you!
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Correct Component for Shopping Cart. 2 135
Create a path if not exists 7 125
Delphi Firemonkey send email on Android 1 80
Firemonkey Tcameracomponent resultion 1 46
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…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

734 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