Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)




"After all the anxiety I had with my previous data provider it is a relief not to have to worry about data speed and integrity." - Comment from Eamonn
"I noticed that ******* quotes locked up shortly after the interest rate announcement yesterday while yours stayed stable." - Comment from Ron in Utah
"With HUGE volume on AAPL and RIMM for 2 days, everyone in a trading room was whining about freezes, crashes and lag with *******, RealTick, TS and Cyber. InvestorRT with IQFeed was rock solid. I mean SOLID!" - Comment from Public IRC Chat
"Very impressed with the quality of your feed - ******* is a real donkey in comparison." - Comment from A.C. via Email
"I would just like to say that IQFeed version 4 is running very well and I am very happy with its performance. I would also like to extend a big thanks for the fast and efficient help that I always receive. My questions and concerns are always addressed promptly. Way to go!" - Comment from Josh in CO.
"As a past ******* customer(and not a happy one), IQ Feed by DTN is a much better and cheaper product with great customer support. I have had no problems at all since switching over." - Comment from Public Forum
"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post
"Boy, probably spent a thousand hours trying to get ******* API to work right. And now two hours to have something running with IQFeed. Hmmm, guess I was pretty stupid to fight rather than switch all this time. And have gotten more customer service from you guys already than total from them… in five years." - Comment from Jim
"Thanks for following up with me. You guys do a great job in tech support." - Comment from Phelps
"I just wanted to say how happy I am with your service. I was able to download the API docs last week and I was able to replicate Interactive Brokers historical bar queries and realtime bar queries over the weekend. That was about one of the fastest integrations that I've ever done and it works perfectly!!!!" - Comment from Jason via Email
Home  Search  Register  Login  Blogs Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather
Follow DTN_IQFeed on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
»Forums Index »IQFeed Developer »IQFeed Developer Support »Delphi
Author Topic: Delphi (5 messages, Page 1 of 1)

mDelp
-Interested User-
Posts: 4
Joined: Dec 16, 2009


Posted: Dec 16, 2009 06:11 PM          Msg. 1 of 5
Does anyone have any sample programs that use Delphi? I have searched the forums, but do not see any. I am looking for COM History examples. I am working in Delphi 7.0

Thank you in advance!
-Mark

David
-DTN Evangelist-
Posts: 113
Joined: May 7, 2004

I'd rather be...


Posted: Dec 17, 2009 10:53 AM          Msg. 2 of 5
There are no examples that I know of - I'd suggest that you consider using the tcp/ip interfaece instead of COM. Clean and works well. It is more in line with how the DTN client is set up to operate too for all communications.

Delphi is a powerful and productive environment. Until I recently started doing some Android projects I did not realize how good it really was.

Good luck!

David

IQXP Software
http://www.iqxp.com

LiveWire Update Service
PO Box 1417
Fairfield, IA 52556
641-472-8393
http://www.livewire-cablesoft.com/

mDelp
-Interested User-
Posts: 4
Joined: Dec 16, 2009


Posted: Dec 17, 2009 11:06 AM          Msg. 3 of 5
Thanks, David. I am willing to try the TCP/IP interface. Delphi does not handle COM very well, that's for sure.

So, does anyone have any samples or code fragments using Delphi with the TCP/IP interface to get me started?

David
-DTN Evangelist-
Posts: 113
Joined: May 7, 2004

I'd rather be...


Posted: Dec 17, 2009 02:40 PM          Msg. 4 of 5
I use a set of components (Internet Component Suite) by François Piette now distributed from http://www.overbyte.be/frame_index.html - I do not know what comes with Delphi 7 but it's tcp/ip client components are probably fine.

I have used ICS for years with little to no issues. Windows is an event driven system - these work in that paradigm in that you do not have to worry about creating a separate thread to service the dynamic data coming in. Just set up event handlers for the respective socket responses: login ops, quotes, history, etc. Simple and can handle high internal bandwidth. Make sure that your processing code in the handlers is fast, especially if displays get involved.

My system can handle 1800 symbols that are very active with no issues on what now would be considered a slow computer. The DTN client has become very efficient and stable over the years and now they have taken it up a notch higher.

Good luck and have fun on your sojourn!

David

IQXP Software
http://www.iqxp.com

LiveWire Update Service
PO Box 1417
Fairfield, IA 52556
641-472-8393
http://www.livewire-cablesoft.com/

mDelp
-Interested User-
Posts: 4
Joined: Dec 16, 2009


Posted: Dec 17, 2009 03:50 PM          Msg. 5 of 5
Thanks again, David! ICS looks good. I will try it out.
 

 

Time: Tue September 18, 2018 11:02 PM CFBB v1.2.0 31 ms.
© AderSoftware 2002-2003