With the release of Windows Phone 7, developers using WCF Data Service Client often find themselves needing to preserve the state their data context is in, and be able to continue from a previously saved state. This is called “Tombstoning”...

We all know hitting the database is an expensive operation, adding the cost of serialization on top of that means that caching the output makes even more sense. The fact that WCF Data Services is built on top of the ASP.net platform means you can utilize...

If you are hosting your WCF Data Service on top of IIS+ASP.Net/WCF, then you may discover that there are certain characters that will cause the server to throw when they are contained in entity keys. The result is either a 400 Bad Request or 404 Not Found...

Suppose you are hosting a WCF Data Service on a particular URL, but for some reason you’d like the consumers of your service to hit another URI – perhaps an IIS re-write, or a cookieless session. You can do this via setting one of the custom properties...

For those of you who love the technology, and want to put your amazing skills to good use – well, now it’s your chance! The Data and Modeling Group at Microsoft has two open Software Development Engineer in Test positions, you can find the description...

In V1 of WCF Data Service (aka ADO.net Data Service), the JSON serialization format for entity sets look like: { "d" : [ {entity1}, {entity2} ] } Where “d” is the “data” wrapper, used as a security measure, and it is defined as the array of...

In my previous post on the protocol versioning scheme for Astoria, I've explained the two HTTP headers DataServiceVersion and MaxDataServiceVersion. These headers are used by the server and client library to determine how and what to communicate with...

Although the Astoria client is really designed to query data existing in some remote service location, it does keep a local copy of all entities it has seen. If the MergeOption is not set to NoTracking, you can find all of the entities currently been...

Now that CTP1 of Astoria has been made public, we have two different versions of server and client that can interact with each other. How does Astoria handle the versioning for the various possible interactions? While this question probably does not concern...

There are many situations where you may encounter an undesired 404 “Resource Not Found” exception while querying against an ADO.net Data Service. For example, you may be writing a Linq query where the filter criteria is specified at runtime by the end...

The recent CTP release of ADO.Net Data Services (Astoria) V1.5 contains a nice feature that allows result set counting on the server side. In this blog post, I’ll go over the various ways you can benefit from this feature in your data service. Type...

The ADO.net Data Services (Code name Astoria) V1.5 CTP1 bits has been released on download center, you can get to it here . While the bits are downloading, you can find out what's new on this release by reading the team blog . Meanwhile, I'm planning...