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Product Description It is nearly impossible today to write enterprise software without the use of one or more relational databases. Granted, there are cases when the data is transient and not stored in a database, but for the most part, software needs to consume and manipulate data in a database. It sounds easy, but there are hundreds of ways to connect software systems to databases and thousands of people who think they have the skeleton key for data access layers. Pro LINQ Object Relational Mapping in C# 2008 explains an efficient, repeatable way to apply industry design patterns to build scalable object–oriented data access layers. Object relational mapping (OR/M) has been a gray area in Microsoft development for many years. It’s not that Microsoft language developers don’t understand OR/M; in fact, the opposite is true, as is exemplified by the glut of third–party .NET OR/M tools on the market. The struggle has come more from the lack of native tools with the object–oriented and object persistence capacity to effectively work in this arena. With the inception of .NET, Microsoft overcame the first obstacle by developing an object–oriented environment and framework. The second obstacle, the native object persistence layer, is only now being realized with the introduction of Language Integrated Query (LINQ) and LINQ’s children, the Language Integrated Query for Relational Databases (LINQ to SQL) and the Language Integrated Query for the ADO.NET Entity Framework (LINQ to Entities). The gray area no longer exists, and the .NET developers of the world finally have the native tools required to build modular, reusable data access layers. What you’ll learn - The powerful advantages that OR/M can bring to your code
- The native tools that are now available within Visual Studio 2008 for OR/M
- How to build scalable object–oriented data access layers that take advantage of OR/M’s flexibility
- How LINQ fits into this picture, together with the advantages and disadvantages that it can bring
- How the concepts work in the real world by examining a fully worked and detailed case study, created with an architecture than can be easily applied to a wide range of other situations
Who is this book for? This book is intended for Microsoft .NET developers who are using or evaluating Microsoft Visual Studio 2008 to build data–aware applications, and it will provide patterns and resources that can be used to build enterprise class software. About the Apress Pro Series The Apress Pro series books are practical, professional tutorials to keep you on and moving up the professional ladder. You have gotten the job, now you need to hone your skills in these tough competitive times. The Apress Pro series expands your skills and expertise in exactly the areas you need. Master the content of a Pro book, and you will always be able to get the job done in a professional development project. Written by experts in their field, Pro series books from Apress give you the hard–won solutions to problems you will face in your professional programming career. Related Titles - Pro C# 2008 and the .NET 3.5 Framework, Fourth Edition
- Pro LINQ: Language Integrated Query in C# 2008
Featured Customer Reviews  so glad i bought this book!,
August 02, 2008 Good overview of DDD with LINQ to SQL,
July 23, 2008
This book gives a pretty good overview of LINQ to SQL--it's not a bad starting point for those (like myself) who prefer the conventions of Domain-Driven Design. The book isn't really a good primer on DDD, but it isn't meant to be. For that, I'd recommend Applying Domain-Driven Design and Patterns: With Examples in C# and .NET.
The book includes a case study, 'The Bank of Pluto'. Source code should be available on the Apress website. You will want to have it to go through the last half of the book, which shows excerpts from the code but doesn't always give enough context to be able to figure it out. While it isn't a complete reference application, the Bank of Pluto example has enough detail to get most programmers up and running.
The book covers both LINQ to SQL, the basic ORM provided by Mictosoft, and the ADO.NET Entity Framework, a more robust framework that can be used as an ORM. It separates it's discussion of the two technologies, which is a good thing. The initial release of the EF is proving quite controversial, with many DDD enthusiasts complaining that it is too database-oriented and "not ready for prime time". Given the controversey, I am passing on EF until Rev. 2.0, at least, so I skipped the EF chapters in the book. That still left me with a good discussion of LINQ to SQL that stands well on its own.
As the text points out LINQ to SQL works pretty well in small-to-mid-size applications, and it can be used successfully in domain-driven designs. It does have problems with complex, enterprise-level domain models. Nonetheless, if you are a domain-driven designer, this book provides a nice introduction to LINQ to SQL and how to integrate it into your application architecture.
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