Implementing OData:Create a User Group Event Feed

Chris Dufour, ASP MVPSoftware Architect, Compuware

chris.dufour@wigets.netTwitter: chrduf

Agenda

What is “Open Data”?What is the “Open Data Protocol”?How is any of this useful/interesting?Build an OData serviceConsume OData using Jquery and code

behind

What is Open Data

“Open Data” is data that is made available to anyone*, in a standard, easily consumable way

Why is this useful?

1. Great ideas require great data2. Data in non-open forms can (and most

likely will) create more friction than good

1. Great ideas require great data

The Top 5 iPhone Apps of 2009 need data…1. Tweetie 22. Yelp3. Slacker (video streaming)4. FlightTrack Pro5. Mint

Windows

iPhone

Browser

Windows Phone

Services powering Experiences

Silverlight

Web Site

Web API

webOS

2. Data in non-open forms can (and most likely will) create more friction than good

“…good data management can generate good science, and bad data management can inhibit the process of scientific discovery.” - Ray P. Norris

How does this encourage productivity?

Why the Web Works

Simple and open◦Addressing scheme – URI◦Application protocol – HTTP◦Representation Format – (X)HTML◦Response codes – HTTP status

Scales best when ◦Stateless◦Cached

It works because people find value in it

The Web of Services should work the way the Web of Pages works

OData Just HTTP

◦ Data as resources, HTTP methods to act on it

◦ Leverage caching, proxies, authentication, …

Uniform way of representing structured data◦ Atom (full AtomPub protocol support), JSON

Uniform URL conventions◦ Navigation, filtering, sorting, paging, etc.

Uniform operations◦ Every piece of information is

addressable◦ GET, POST, PUT, DELETE always mean

the same

Demo

Expose UG Event Data

ResourcesOpen data protocol – OData

◦ http://www.odata.org/OData Explorer

◦ http://silverlight.net/ODataExplorer/LinQPad

◦ http://www.linqpad.net/Beta.aspxJSONP and URL-controlled format support

◦ http://code.msdn.microsoft.com/DataServicesJSONPjQuery Templates plugin (jquery-tmpl)

◦ http://weblogs.asp.net/scottgu/archive/2010/10/04/jquery-templates-data-link-and-globalization-accepted-as-official-jquery-plugins.aspx

◦ http://api.jquery.com/category/plugins/templates/