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Language Integrated Query (LINQ), as well as the C# 3.0 and VB 9.0 language extensions to support it, is the most import single new feature of Visual Studio 2008 and the .NET Framework 3.x. LINQ is Microsoft's first attempt to define a universal query language for a diverse set of in-memory collections of generic objects, entities persisted in relational database tables, and element and attributes of XML documents or fragments, as well as a wide variety of other data types, such as RSS and Atom syndication feeds....
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Language Integrated Query (LINQ), as well as the C# 3.0 and VB 9.0 language extensions to support it, is the most import single new feature of Visual Studio 2008 and the .NET Framework 3.x. LINQ is Microsoft's first attempt to define a universal query language for a diverse set of in-memory collections of generic objects, entities persisted in relational database tables, and element and attributes of XML documents or fragments, as well as a wide variety of other data types, such as RSS and Atom syndication feeds. Microsoft invested millions of dollars in Anders Hejlsberg and his C# design and development groups to add new features to C# 3.0—such as lambda expressions, anonymous types, and extension methods—specifically to support LINQ Standard Query Operators (SQOs) and query expressions as a part of the language itself.
Corresponding additions to VB 9.0 followed the C# team's lead, but VB's implementation of LINQ to XML offers a remarkable new addition to the language: XML literals. VB's LINQ to XML implementation includes XML literals, which treat well-formed XML documents or fragments as part of the VB language, rather than requiring translation of element and attribute names and values from strings to XML DOM nodes and values.
This book concentrates on hands-on development of practical Windows and Web applications that demonstrate C# and VB programming techniques to bring you up to speed on LINQ technologies. The first half of the book covers LINQ Standard Query Operators (SQOs) and the concrete implementations of LINQ for querying collections that implement generic IEnumerable<T>, IQueryable<T>, or both interfaces. The second half is devoted to the ADO.NET Entity Framework, Entity Data Model, Entity SQL (eSQL) and LINQ to Entities. Most code examples emulate real-world data sources, such as the Northwind sample database running on SQL Server 2005 or 2008 Express Edition, and collections derived from its tables. Code examples are C# and VB Windows form or Web site/application projects not, except in the first chapter, simple command-line projects. You can't gain a feel for the behavior or performance of LINQ queries with "Hello World" projects that process arrays of a few integers or a few first and last names.
This book is intended for experienced .NET developers using C# or VB who want to gain the maximum advantage from the query-processing capabilities of LINQ implementations in Visual Studio 2008—LINQ to Objects, LINQ to SQL, LINQ to DataSets, and LINQ to XML—as well as the object/relational mapping (O/RM) features of VS 2008 SP1's Entity Framework/Entity Data Model and LINQ to Entities and the increasing number of open-source LINQ implementations by third-party developers.
Basic familiarity with generics and other language features introduced by .NET 2.0, the Visual Studio integrated development environment (IDE), and relational database management systems (RDBMSs), especially Microsoft SQL Server 200x, is assumed. Experience with SQL Server's Transact-SQL (T-SQL) query language and stored procedures will be helpful but is not required. Proficiency with VS 2005, .NET 2.0, C# 2.0, or VB 8.0 will aid your initial understanding of the book's C# 3.0 or VB 9.0 code samples but isn't a prerequisite.
Professional ADO.NET 3.5: LINQ and the Entity Framework concentrates on programming the System.Linq and System.Linq.Expressions namespaces for LINQ to Objects, System.Data.Linq for LINQ to SQL, System.Data.Linq for LINQ to DataSet, System.Xml.Linq for LINQ to XML, and System.Data.Entity and System.Web.Entity for EF's Entity SQL.
I. Getting a Grip on ADO.NET 3.5.
1. Taking a New Approach to Data Access in ADO.NET 3.5.
II. Introducing Language Integrated Query.
2. Understanding LINQ Architecture and Implementation.
3. Executing LINQ Query Expressions with LINQ to Objects.
4. Working with Advanced Query Operators.
III. Applying Data Source-Specific LINQ Implementations.
5. Using LINQ to SQL and the LinqDataSource.
6. Querying DataTables with LINQ to DataSets.
7. Manipulating and Linking Documents with LINQ to XML.
8. Exploring Third-Party and Emerging LINQ Implementations.
IV. Introducing the ADO.NET Entity Framework.
9. Raising the Level of Data Abstraction with the Entity Data Model.
10. Defining Conceptual, Mapping, and Storage Schema Layers.
11. Introducing the Object Services Layer and Entity SQL.
12. Taking Advantage of LINQ to Entities.
V. Implementing the Entity Data Model.
13. Generating Mapping Metadata with the EDM Designer.
14. Binding Data Controls to the ObjectContent.
15. Updating the Persistence Layer.
Posted April 15, 2009
Mr. Jennings demonstrates a thorough knowledge of the subject matter. The information is in-depth and the author thoroughly covers the subject matter. Mr. Jennings does a good job in describing the Entity Framework. The technical details can make for slow reading, but it is a trade off for the amount of information the reader gets.
This is not a book for someone looking for a quick read though on the subject matter. On the other hand if someone wants a thorough understanding of the subject matter, this would be a good selection.