How do I implement a Push-Pull web application

Question

The data is either in files or databases.

I want to implement data grids which will pull data from files (either .h5, csv or xml) and sql server database and show them being updated in real time.

I don't want to implement a timer which has few seconds interval. I want to implement a pull push technology in asp.net/c#/silverlight which I could use?

Please guide how best to implement it and if there are any libraries available that I can use?

Have you tried anything? Having any problems? Any code to show? These 3 questions should set the bar as to whether you should post a question or use google for research.. — Fosco, May 19 '11 at 15:13
nope, haven't tried anything. i dont want to code anything that i might have to delete later so wanted to get some feedback from experts like yourself to ensure i follow the right path in developing this app — InfoLearner, May 19 '11 at 15:17
If I didn't code things that might get thrown away later, I'd never have learned or developed anything. — Fosco, May 19 '11 at 16:44

score 6 · Accepted Answer · answered May 19 '11 at 15:14

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Try the PokeIn ASP.NET Comet Library.

answered May 19 '11 at 15:14

Forgotten Semicolon

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score 3 · Answer 2 · edited May 23 '17 at 12:24

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Look into Comet. Also check out this question (and answers).

edited May 23 '17 at 12:24

Community

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answered May 19 '11 at 15:12

Bala R

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score 2 · Answer 3 · answered May 19 '11 at 15:16

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You could look into Websockets, be aware the end users will need to have a websocket enabled browser and also note the following from wiki

For the client side, WebSocket was to be implemented in Firefox 4, Google Chrome 4, Opera 11, and Safari 5, as well as the mobile version of Safari in iOS 4.2.1 However, although present, support is now disabled by default in Firefox and Opera because of concerns over security vulnerabilities

answered May 19 '11 at 15:16

redsquare

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There's a websocket implementation for SilverLight. Which makes writing the backend easier because SilverLight is microsofty. – Raynos May 19 '11 at 16:17

score 0 · Answer 4 · answered May 22 '11 at 18:23

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WCF tech in a publisher-subscriber or observer pattern. Or SQL Server Service Broker notifications with a SqlDependency object. Or CLR stored procs that notify clients from within the DB.

answered May 22 '11 at 18:23

andrewbadera

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How do I implement a Push-Pull web application

4 Answers4