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Why My WCF Data Service isn’t Returning JSON Format? Lately, I had the need to use WCF Data Services in a project. It has been a while since I used and wrote about WCF Data Services and a lot was changed in the framework. The scenario I needed to implement was calling a data service using jQuery. So I wrote the relevant service and used the code I wrote a few years ago and nothing happened… I got a HTTP error – HTTP Error 415 Unsupported media type . Since I know that WCF Data Services support JSON...
WCF Data Services Processing Pipeline First I must confess. Even tough I like OData and WCF Data Services, in the last couple of months I didn’t have the chance to work or use them. This is why when .NET 4 was shipped I haven’t noticed a new and interesting extension point in the framework – the processing pipeline . In the last MIX11 I got a little introduction to that extension point in Mike Flasko’s session . In this post I’ll explain what is the WCF Data Services' server side processing pipeline...
Making a JSONP Call to a WCF Data Service using datajs During MIX11 I attended a very interesting session about datajs which was presented by Asad Khan and Marcelo Lopez Ruiz. As I promised in my previous post , in this post I’ll show you how to make a JSONP call to a WCF Data Service using datajs library. A Little About datajs datajs is a very promising JavaScript library which is currently being built by Microsoft as an open source in CodePlex. The library as described in its CodePlex site is ...
Combining WCF Data Services, JSONP and jQuery During Mike Flasko’s session at MIX11, he showed how to create a JSONP aware WCF Data Service with a JSONPSupportBehavior attribute that is available for download from MSDN code gallery (and is supposed to be a part of Microsoft.Data.Services.Extensions namespace). In this post I’ll show a simple example that uses the attribute and jQuery in order to make a JSONP cross domain call for a WCF Data Service. Setting up the Environment First I started by creating...
Configuring WCF Data Services using Lambda Expressions One of the things that I avoid when I’m writing code is the use “magic strings”. Hardcoded strings are a code smell and should be rarely used. When using WCF Data Service configuration object you’ll have to pass the entity set’s string name to the configuration methods which as I wrote I would like to avoid. This is why in today’s post I’m going to extend the DataServiceConfiguration object to support lambda expressions instead of string parameters...
Sela SDP Conference Sessions Slide Deck and Demos Yesterday Sela SDP Conference ended after 4 intensive days. In the conference I had two breakout sessions about OData and about Code First in Entity Framework . First of all I want to thank all the attendees in those sessions. I hope that you had good time and that you enjoyed the sessions and of course the whole conference. As always I published the sessions slide decks and demos for you to download . The recording (in Hebrew ) of all the conference...
My SDP Lecturer Interview Last week Sela conducted a live broadcast with trailers to the sessions that will be presented on stage in the SDP conference. The broadcast was recorded if you want to see me “making a fool” of myself in the live broadcast you can watch the recording of my interview here ( in Hebrew ). I’m reminding that I’m going to have two sessions: Creating OData Services with WCF Data Services Data is a first-class element of every application. The Open Data Protocol (OData) applies...
MIX11 Open Call Voting Has Started Today MIX conference is the biggest Microsoft web conference which occurs every year in Las Vegas. As in every year Microsoft asked the developers and designers communities to propose sessions that will be part of a community voting. The sessions that will be chosen will be performed on stage at this year’s conference. Since I’m going to MIX11 as in last year, I proposed two sessions and they were chosen to the open call voting. This is the session descriptions...
Using EF DbContext with WCF Data Services One of the questions that you may ask yourself with the new EF feature CTP5 is how to embed the new DbContext object inside an OData service or more particularly inside WCF Data Service . This post will supply the solution. DbContext as WCF Data Service Data Source Entity Framework has a good integration with WCF Data Services . All you need to do when you create a WCF Data Service with EF is to put the generated ObjectContext as a data source of the service...
Exposing a Stored Procedure in WCF Data Service Today I answered a question in the data platform development forums. The question was simple – how to expose a stored procedure which is mapped to an Entity Framework model through a WCF Data Service . This post will show you exactly how to do this. The Stored Procedure First I’ve created a the following stored procedure: CREATE PROCEDURE dbo.GetCoursesOrderByTitle AS BEGIN SET NOCOUNT ON SELECT CourseID, Title, Days, [ Time ], Location, Credits, DepartmentID...
OData Session Slide Deck and Demos Yesterday’s evening I delivered an OData session at the Israeli Web Developer Community ( WDC ) user group at Microsoft Ra’anana. The session included the following agenda: The OData need. What is OData ? Creating and consuming OData feeds. I want to thank all the attendees who came to the session. I really enjoyed to deliver the content about OData and the audience was very cooperative with a lot of good questions that helped to highlight many crucial...
OData Session is Occurring Today Today at 17:30 I’m delivering an OData session at Microsoft office in Ra’anana. Come and hear about the Open Data Protocol, a new protocol for exposing and consuming data on the web. The OData ecosystem is a growing community of data producers and consumers using the Open Data Protocol to exchange data. The Open Data Protocol breaks down data silos and increases the shared value of data and its associated business logic through the Web by enabling the exposure of...
OData Session is Coming At last my OData session details were published today. The OData ecosystem is a growing community of data producers and consumers using the Open Data Protocol to exchange data. The Open Data Protocol breaks down data silos and increases the shared value of data and its associated business logic through the Web by enabling the exposure of any data source as a Web-friendly data feed. The easiest way to become an OData producer in the .Net world is by using WCF Data Services...
OData Explorer One nice tool to use with OData is the OData Explorer . The OData Explorer is a tool that helps to explore OData feeds in a visual way and not by exploring the Atom/JSON responses. You can download the tool from here . Another way to use the tool is by going to the following link: http://Silverlight.net/ODataExplorer . OData Explorer Requirements The tool is a Silverlight 4 project. In order to use it you’ll have to answer these requirements: Visual Studio 2010 Silverlight 4 Developer...
Loading WCF Data Services Ajax Script Library Since I’ve given sessions about WCF Data Services in the past (when they were called ADO.NET Data Services ) I wanted to reuse some of the Ajax examples I showed for my coming OData session. One of the things that have been changed lately were the scripts to use when you want to make Ajax calls to your Data Service . So I downloaded the new scripts and saw that the names of the objects to use have been changed a little but their functionality remained...
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