Vitek's Blog

The OData protocol supports a feature called Server driven paging. It is used to limit the amount of data client can query with a single request while still providing a way from the client to get all the data (in multiple requests). A more detailed explanation...

Implementing custom provider for WCF Data Services is complicated enough. The fact that for the really interesting providers it’s also necessary to implement a custom IQueryable makes things just so much more complicated. Based on feedback from multiple...

With the recent release of the WCF Data Services Oct 2010 CTP1 for .NET4 the WCF Data Services now has the ability to expose Multi-Value properties (formerly called “Bags”). These can come very handy when you want to include short collections of primitive...

Series: This post is the ninth part of the Data Services Expressions Series which describes expressions generated by WCF Data Services. In the last post we looked at projections, which leaves us with just one last big feature, expansions. The $expand...

Series: This post is the eighth part of the Data Services Expressions Series which describes expressions generated by WCF Data Services. Projections feature is visible in the URL through the $select query option. It allows the client to ask the server...

Series: This post is the seventh part of the Data Services Expressions Series which describes expressions generated by WCF Data Services. In this post we will examine how navigations are expressed by the WCF Data Services and what the provider needs to...

Series: This post is the sixth part of the Data Services Expressions Series which describes expressions generated by WCF Data Services. We will be looking into navigations in the next couple of posts. To be able to do that we first have to explain so...

Series: This post is the fifth part of the Data Services Expressions Series which describes expressions generated by WCF Data Services. This time we will look at how WCF Data Services translates sorting expressions. Sorting expression are used when the...

Series: This post is the fourth part of the Data Services Expressions Series which describes expressions generated by WCF Data Services. In this part we will talk about accessing properties in the expressions. WCF Data Services may need to access a property...

Series: This post is the third part of the Data Service Expressions Series which describes expressions generated by WCF Data Services. In this part we will look at how filters are represented in the expressions. The Queryable.Where method Filters are...

Series: This post is the second part of the Data Services Expressions Series which describes expressions generated by WCF Data Services. In this part we will first look how to watch the expressions generated by Data Services. Then we’re going to discuss...

WCF Data Services uses Data Service Providers to determine the shape and actual values of the data to expose. There are two providers implemented already for you (Entity Framework provider and Reflection provider) and you can also implement a custom provider...

It seems that I’ve finally got to start this blogging thing, exciting times… Let me introduce myself - I’m Vitek a developer on the WCF Data Services (aka Astoria) team. In the past I’ve worked on Microsoft’s XML technologies like XmlLite and System.Xml...