Its a common ask that we introduce aggregating mechanisms in Data services so that one can do a Count of the number of entities present in an EntitySet easily. In this blog post , I will outline one method of implementing a “Count” method that works for you. The interface to the count method will be http:// < ServiceEndPoint > /Count?entitySetName=' < entitySetName > ' Server-Side...

Client Library : System.Data.Services.Client Server : System.Data.Services White papers coming soon !!

[These code snippets are based on features in the SP1 RTM release, Read about it here : RTM is here! ] Quite a few times, I forget the syntax for certain tasks while Creating a Data Service . To avoid remembering the syntax, I came up with a couple of Code Snippets that I use for Query Interceptors and Change Interceptors. You can download the Code Snippets Here   [Edit : Alternate download link...

Here you go ! Install the latest bits of Astoria and play to your heart's content .... Download here : Microsoft .NET Framework 3.5 Service Pack 1 <blurb> The ADO.NET Data Services Framework consists of a combination of patterns and libraries, which enable data to be exposed as a flexible REST (Representational State Transfer)-based data service that can be consumed by Web clients in a corporate...

Hi, For most of the code samples that I post on my blog , I use “ Insert Code for Windows Live Writer ” plugin for WLW   to format code snippets and  absolutely love the way that the code snippet turns out on the blog.    I use the Dark Theme  by Orren Ellenbogen for my VS at home and at work and wanted to mirror   the code snippets on my blog to turn up the same way ...

With how easy it is to write simple & complicated templates, you would want to debug the template generation or enable certain scenarios wherein you have to do complex manipulation of data using the existing data being bound. Events The Templating engine fires the ItemCreated event which is similar to the OnItemCreated of the ASP.NET DataGrid. You can subscribe to the event by calling the add_itemCreated...

If you are just tuning in , you can read Part 1 here Parent Entity Child Entity List Properties        ListID        ListTitle Associations        ListElements ListElement Properties        ListElementText        ListElementID Associations       ...

By now , you must have heard about the new JavaScript templating engine with the release of ASP.NET AJAX 4.0 CodePlex Preview 1 This post will show you how to use the built-in control DataView to build a master details view. As an addition , I will use an astoria service to serve the data and the Ajax Library to retrieve the data. Consider the following model.. Parent Entity Child Entity List Properties...

Yep , I got Tagged . And by none other than Pablo Castro !!. Now that I’ve finished gloating , let me propagate the Meme. How old were you when you started programming?       I was 15 when I first got my hands on a PC in my school’s computer lab.       and then BASIC happened and I realized that the machine in front of me is filled with immense potential ...

Today's Post is co-Authored by Linq Ninja and my Colleague Marcelo Linq to Astoria does not support Set based queries , which means that this query is invalid List< string > citiesIWillVisit = new List< string >(){ "London" , "Berlin" , "Prague" }; var customersAround = nwContext.Customers.Where<Customers>(cx => citiesIWillVisit.Contains(cx.City)); The above example would...

I’ve seen that users are having some question about how to deal with certain types of relations between entities and how to deal with them in the client library.I will outline the a couple of common scenarios of using the client library among a few relationship types. I'll be using the AdventureWorks Database for examples of relations. 1..1 Associations This is the case of entities associated with...

Hi all, By now , anyone running a SIlverlight application Astoria Silverlight Client library in Firefox 3.0 would have seen a weird error about charsets. This blog post will describe the error and how to work-around it . Consider the following query : DataServiceQuery<Customers> customerQuery = from cus in context.Customers where cus.ID == 'ALFKI' select cus; AsyncCallback ac = iasyncResult...

When developing your service , you might run into some issues and you want to debug your service. Imagine that you are inserting data into the store using astoria and you start getting DataServiceExceptions in your client code. The normal error message would be .. <? xml version ="1.0" encoding ="utf-8" standalone ="yes" ? > < error xmlns ="http://schemas.microsoft.com/ado/2007/08/dataservices...

So , I finally made a move from my job in PSS to the product I enjoyed playing with most , ASTORIA ( ADO.NET Data Sources ). Of course, this means that I have moved from half-way across the world to join the team in Redmond, WA. About a week after I joined , we went Skiing .  Me , being a  novice , hurt myself snowboarding and wear a band-aid on my forehead as proudly as one would wear a...

Ok , this has to be the coolest thing ever !! Angus just announced this over on his blog , you can now add a web version of the windows Live Communicator to your blog / website. You can find details about how to set this up on his blog . Re-sizing the IM Control . The markup to be added to your blog contains the width and the height specified as 300 px. You can modify the Width and the height of the...