This walkthrough shows how a simple web application can be built using the reference data caching features in the “Microsoft WCF Data Services For .NET March 2011 Community Technical Preview with Reference Data Caching Extensions” aka “...

A number of people have asked for an updated ADO.NET Data Services client library to run inside the Microsoft Silverlight 1.1 Alpha September Refresh, and today we are releasing just that. The Microsoft ASP.NET 3.5 Extensions Preview CTP shipped in December...

  Today we are releasing CTP2 of the next version of the WCF Data Services libraries.  This release targets .NET 4 and Silverlight 4 and includes new client and server features in addition to those that shipped as part Oct 2010 CTP1 .  ...

We have received a lot of feedback over the past few weeks asking when will be update the Silverlight library for data services. I thought I'd put up a short post to update everyone on where we are at and what our thinking is.... I'll start by saying...

It's amazing to see how many people are building great things with Astoria so early in the cycle. We talk with folks in the development community often and we hear stories that range from teaching classes, to giving talks, to building experimental systems...

Today we are releasing CTP1 of the next version of the WCF Data Services libraries.  This release targets .NET 4 and Silverlight 4 and includes new client and server features in addition to those that shipped as part of .NET 4 & SL4.  With...

TL;DR: OData does not currently support enum types, and WCF Data Services throws an unclear exception when using the EF provider with a model that has an enum property. Mark the property with a [NotMapped] attribute to get around this limitation. In today...

A new name, but goals stay the same As per our last blog post, we just finished a round of presentations on Astoria at Tech Ed EMEA, Tech Ed Africa, Dev Connections and finally Dev Teach. Thanks to everyone that attended our sessions and who stopped by...

TL;DR We recently prereleased an updated OData Client T4 template to NuGet. The template will codegen classes for working with OData v3 services, but full support has not been added for all v3 features. What is the OData Client T4 template? The OData...

Less than two weeks ago, we released WCF Data Services 5.0.0 . Today, we are releasing 5.1.0-rc as a NuGet prerelease. What is in the prerelease This prerelease contains several bug fixes: WCF Data Services fails to work properly with the $expand query...

The Data Services team has released a refresh of the ADO.NET Data Services Update for .NET Framework 3.5 SP1 today and provides fixes for issues reported to us in the update to .NET Framework 3.5 SP1. For Windows Vista, Windows XP, Windows Server 2003...

We have received a fair amount of feedback regarding a number of use cases where it would be beneficial to enable a client of a data service to “batch” up a group of operations and send them to the data service in a single HTTP request . This reduces...

Problem statement Today in Astoria if you have two entity types that are functionally in a containment relationship, you still see a top-level entity set for the instances of the contained type, and further the URLs for instances of the contained types...

Today we are releasing version 5.4.0 of WCF Data Services. As mentioned in the prerelease post , this release will be NuGet packages only. That means that we are not releasing an updated executable to the download center. If you create a new WCF Data...

In Part 1 we created a Data Service that exposes V2 of the OData Protocol, in this post we will create a WPF application to consume our Data Service. Walkthrough: Step 1 – Update Code Generation Settings: The Data Services Update is basically...

Download the sample code In the previous blog post , we walked through the steps to build an OData-enabled client using the new Windows UI. In this blog post, we’ll take a look at some of the code that makes it happen. ODataBindable, SampleDataItem...

Problem Statement OData (the protocol used by WCF Data Services) enables you to address the relationships between Entries. This functionality is required to be able to create or change a relationship between two instances, such as an Order_Detail that...

We recently put together a document that contains some of our thinking about JSON light as well as a whole slew of sample payloads. We would love to hear any feedback you have on the format; you can comment in the accompanying OneNote. We will be accepting...

Note: This post refers to the CTP available here . When building frameworks to expose and consume data on the web, access policy and data validation are always one of the first topics discussed during the design process, at conferences, etc. Given this...

Introduction Last week at MIX we announced proposed extensions to the OData protocol for obtaining changes (deltas) to the results of an OData Request. The extensions provide a hypermedia-driven model for obtaining a "Delta Link" from a delta...

The goal of Astoria in V1 is to easily expose a data source using the REST approach to the web (with support for concurrency, versioning, auth, etc).  In general, the way we think about serialization formats (ie. how we represent entites on the wire...

This post is a drill down into the Server Driven Paging (SDP) feature added in data services v1.5 CTP1. Since this is the first CTP release of this feature we look forward to hearing your feedback. What is Server Driven Paging? This feature is best...

We recently released a CTP of the next set of things we are working on for ADO.NET Data Services. We are calling this new set of features v1.5 because they are built on top of ADO.NET Data Services v1.0. ADO.NET Data Services v1.0 was included as part...

The WCF Data Services 5.0 RTM release includes an update to the Add Service Reference behavior in Visual Studio. For most project types that target .NET Framework 4.0, this means that when you add a new service reference, you will automatically get assembly...

Believe it or not, but we did ship ADO.NET Data Services with a few bugs. One issue in particular is fairly nasty. However the code developers might be tempted to write to work around the bug could cause far worse problems down the road when we fix the...