LINQ Programming

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Product Description

Take your LINQ programming skills to the top tier

Resolve data format impedance mismatch with guidance from a C# expert and Microsoft MVP. LINQ Programming details cutting-edge techniques to effectively assimilate XML, SQL, ADO.NET, and unstructured data sources. Build powerful LINQ queries, handle hierarchical and relational data, use lambdas and expression trees, and develop multi-threaded applications. Get proven strategies for handling conflicts and exceptions and creating custom extension methods. Additionally, you'll learn how to create your own LINQ provider through a working example, LINQ to Twitter.

• Filter, order, and group code using LINQ to Objects
• Query relational and unstructured data with LINQ to SQL and LINQ to XML
• Work with ADO.NET through LINQ to DataSet
• Deploy object-oriented programming techniques and LINQ to Entities
• Read, manipulate, and create C#-based XML documents
• Generate DBML and external mapping files with SqlMetal
• Create custom lambdas, expressions, providers, and extensions
• Support concurrent processing and multi-threading using PLINQ
• Build a custom LINQ provider for working with any data source

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LINQ Programming Review

Compared to most .Net developers I am a relative novice. I don't develop in .Net full time. I'm a Java developer by day and do some consulting in .Net on nights and weekends. My experiences with .Net so far have been some basic ASP.Net web sites with SQL Server as the back end database. Most of my experience has been with Visual Studio 2008. I wanted to review this book to assist me in coming up to speed in LINQ and Visual Studio 2008. I started this will little or no exposure to LINQ. I just knew that it was a new programming tool from Microsoft to make accessing databases easier for the .Net developer. My goal from reading this book was to walk away with basic knowledge of using LINQ. Now having read the book and done the exercises that are included in it, I can say that I do have a basic understanding of how to use LINQ. I liked the fact that the author, Joe Mayo, chose to include exercises for the reader to do along with reading his book. I'm of the school that learns by doing, not by simply reading about new technologies, so this was very helpful for me in terms of understanding the concepts the author was discussing.

I got through all of the exercises except one that I had trouble with. I emailed the author about my troubles and he responded the same day and informed me that I needed to install Visual Studio 2008 service pack two to get the new functionality that I need for the exercise. I thought it was very nice of him to get back to me so quickly! I did have some trouble due to my lack of experience with some of the more advanced features of the C# programming language, (partial classes and partial methods, Lambda expressions etc). None of these issues were show stoppers in getting through the material in the book.

I was very impressed with the LINQ technology. You can just drag and drop a table from your database onto the page in Visual Studio and it builds a great deal of code for you. It builds the code that you will use to insert and update your data in that table. Very impressive! Microsoft has come a long way in terms of making a developer's job easier.

I had a really hard time with the syntax that LINQ uses. I'm an old Oracle developer and it took me a while to get used to this SQL server way of writing queries, but LINQ queries look entirely different than what I'm used to and it is not intuitive to me.

I'm used to:
SELECT first_name
FROM Users WHERE last_name = `Jones'

The same query in LINQ is something like:
FirstNames =
FROM names in Users
WHERE last_name = `Jones'
SELECT first_name

I'm having a really hard time with this new syntax but I will get used to it as I get more experience and it has nothing to do with the book or the author, it has to do with the technology of LINQ.

I thought the book was well written and well organized. It's obvious to me the Mr. Mayo has a great deal of knowledge and experience with LINQ and .Net development in general and it shows in his book. I think this is a good book for experienced .Net developers. I think I would have gotten more out of the book if I had a little more .Net programming experience. This is not a book for a beginner in .Net, Visual Studio 2008, or Database development. There are other beginner level books more specific to those topics where beginners should go.

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