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  • Blog Post: SQL Connectivity Annual Survey

    Greetings to the SQL Server community : Last year in October 2009, we introduced the process of interacting on a regular basis with the developers and users in the form of surveys. During the last 12 months, we completed surveys that focused on the broad SQL Connectivity components, including ODBC...
  • Blog Post: Microsoft SQL Server has a new connectivity portal page!

    The Microsoft SQL Server team is working on a portal page that brings together common resources and community links for all data access providers to Microsoft SQL Server. We’d like your feedback on how useful you will find it and what else you’d like to see included. Although, at this time...
  • Blog Post: Exception Handling in the .NET Framework Data Provider for ODBC, OLE DB, and for SQL Server

    Developers using the .NET Framework Data Provider for ODBC, the .NET Framework Data Provider for OLE DB, or the NET Framework Data Provider for SQL Server often send feedback to Microsoft, asking for a complete list of the exceptions that a given method can throw. Until such time as the documentation...
  • Blog Post: Extending Lightweight Transactions in SqlClient

    We’ve done some work with SqlClient’s System.Transaction support for Sql Server 2008. To explain what we did, and why, I’m going setup some background first, which may also be useful for understanding the existing behavior. System.Transactions offers a simple, intuitive model for controlling transactions...
  • Blog Post: ADO.NET at the Advisor Summit

    Last week at the Advisor Summit conference I gave a talk introducing new LINQ functionality being introduced in the Orcas timeframe (and beyond). As you probably know if you've been reading this blog regularly, LINQ functionality will begin to ship as part of Visual Studio Codename "Orcas" and...
  • Blog Post: ADO.NET Entity Framework Update

    Microsoft is deepening its investment in the ADO.NET Entity Framework as a critical piece of Microsoft’s Data Platform vision. Based on the need to align with requirements from key internal partners that are building on the Entity Framework, along with the need for a better tool experience, we have decided...
  • Blog Post: Entity Framework Orcas Beta 1 - EDM Wizard Fixed

    Late last week, after bits had been finalized, we found a bug in the ADO.NET Entity Data Model Wizard that shipped with Visual Studio “Orcas” beta 1. The problem has now been corrected. Please download and install the patch available at: http://www.microsoft.com/downloads/details.aspx?FamilyID...
  • Blog Post: ADO.NET Entity Framework - Orcas Beta 1

    What else do you need to know about the Entity Framework? We've documented basic syntax and provided a few samples. How can we improve the documentation? Send us scenarios you want to implement. Orcas Beta 1 contains the ADO.NET Entity Framework. This technology requires new ways of thinking about...
  • Blog Post: Orcas Beta 1 - Now Available

    Orcas Beta 1 is available for download! Check out the Visual Studio Downloads page for more info.
  • Blog Post: .NET Rocks with the ADO.NET Team!

    Daniel Simmons, ADO.NET Dev Lead, recently sat down with Carl Franklin and Richard Campbell of .NET Rocks to talk in depth about the new ADO.NET Entity Framework. Check out Show #226 and learn more about Microsoft's vision for the Entity Framework long-term and how it is being realized in current development...
  • Blog Post: EDM Wizard and Designer Featured in VSLive! San Francisco Keynote

    Britt Johnston, Director, Data Programmability at Microsoft gave a Keynote speech this morning at VSLive in San Francisco. In his presentation, Britt spoke largely about the idea of Conceptual Data Programming and Microsoft's vision for Data Access: raising the level of abstraction around data access...
  • Blog Post: ADO.NET Orcas: Sample Provider

    Last month, the ADO.NET team hosted a number of ADO.NET Data Provider writers on campus to present information on how to enhance an existing provider to support the Entity Framework features in the upcoming Orcas release. To help provider writers who were unable to attend, we’re publishing the material...
  • Blog Post: Inheritance in the Entity Framework

    One of the coolest features of the ADO.NET Entity Framework is the ability to use inheritance in your database! Very cool, but what does it mean, and why is it important? War of the worlds Relational The world of relational data is based around tuples, which have an inherent two dimensional...
  • Blog Post: 101 LINQ Samples Updated

    The 101 LINQ Samples that were included in the March CTP have now been updated to include the 101 LINQ to Entities Samples. To check out the newest samples (updated April 17th) download from here . Cheers, Elisa Johnson Data Programmability Community Program Manager
  • Blog Post: Using Stored Procedures for Change Processing in the ADO.NET Entity Framework

    Most people who’ve played with the ADO.NET Entity Framework eventually ask whether they can replace the SQL statements it generates with stored procedures of their own. This is important in many applications because direct table access is not allowed. Current builds of the Entity Framework support using...
  • Blog Post: LINQ - XElement and Entities

    With LINQ we get a common data programming experience across multiple data sources. We can query in-memory collections, relational tables and XML. The other day I was looking at the various LINQ-XML examples and thought to myself that I would like to play around with loading my database from a remote...
  • Blog Post: Object Services – Write less code

    One of the main features of the Entity Framework revolves around Object Services. The main points of Object services are to write less code and allow programmers to program against objects to access the data that’s stored in a database or possibly anywhere. We can consider this feature as a road to CRUD;...
  • Blog Post: RSS Feeds with ADO.NET Entity Framework and the ASP.NET RSS Toolkit

    The ASP.NET team has released the RSS toolkit beta on sandbox.asp.net . This led me to want to tinker with exposing some RSS feeds using ADO.NET Entity Framework to retrieve the data. I pulled the toolkit and within 10 minutes had my first couple of feeds going. Pretty simple, yet cool stuff. The...
  • Blog Post: Mapping 101: Part 1

    Now that you’re getting accustomed to the Entity Framework and Entity Data Model ( Entity Data Model 101: Part 1 and Entity Data Model 101: Part 2 ), we’ll now take a look at the Object Relational Mapping (ORM) characteristics of the Entity Framework. We’ll post several “Mapping 101” topics to describe...
  • Blog Post: Entity Client

    With the next release of the .NET Framework, ADO.NET will introduce a new member of the family of data providers – EntityClient . The mission of EntityClient is to provide a gateway for entity-level queries . Through EntityClient one queries against a conceptual model, not against a specific store implementation...
  • Blog Post: Nulls - LINQ to DataSets Part 3

    In previous posts I have spent time talking about LINQ to DataSet, and how it can help you write better code, and how you can write some very interesting queries with DataSet. Today I am going to talk more about nulls, which is one of the areas in which there is a lot of confusion. The key thing to...
  • Blog Post: Entity Data Model 101 - Part 2

    Entity Containers In part one of this article we looked at declarations of entity and association types in conceptual schema definition language (CSDL). Now we have to be specific about where instances of those types are stored, which we refer to as “scope”. First, we must distinguish entity and association...
  • Blog Post: Type safety - LINQ to DataSets Part 2

    Back in the first post of this LINQ to DataSet series, I spent some time talking about what LINQ to DataSet is, and how it can be used to supplement the existing query capabilities in terms of what kind of queries you can write. Today, I will talk about how LINQ provides more than just increased capabilities;...
  • Blog Post: Entity Data Model 101: Part 1

    Most developers are familiar with the Object/Relational Mapping (ORM) problem: databases use the abstraction of rows in tables, but application programs use the abstraction of classes and objects. Existing ORM frameworks tend to address this mismatch by allowing programming classes to be annotated in...
  • Blog Post: Querying DataSets – Introduction to LINQ to DataSet

    Greetings fellow data junkies! My name is Erick Thompson, a PM at Microsoft who is working on driving ADO.NET forward to utilize the latest and best technology that we have coming down the pipe. In that context, I am excited to tell you about LINQ to DataSet, a new and powerful way to write queries against...
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