August 2012
Intermediate to advanced
840 pages
22h 41m
English
Content preview from Visual Basic 2012 Programmer's ReferenceBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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SUMMARY
LINQ provides the ability to perform SQL-like queries within Visual Basic. Depending on which form of LINQ you are using, the development environment may provide strong type checking and IntelliSense support.
LINQ to Objects allows a program to query arrays, lists, and other objects that implement the IEnumerable interface. LINQ to XML and the LINQ XML classes allow a program to extract data from XML objects and to use LINQ to generate XML hierarchies. LINQ to ADO.NET (which includes LINQ to SQL, LINQ to Entities, and LINQ to DataSet) allows a program to perform queries on objects representing data in a relational database. Together these LINQ tools allow a program to select data in powerful new ways.
Visual Basic includes many features that support LINQ. Extension methods, inline or lambda functions, anonymous types, type inference, and object initializers all help make LINQ possible. If misused, some of these features can make code harder to read and understand, but used judiciously, they give you new options for program development.
For much more information on the various LINQ technologies, see the online help and the web. The following list includes several useful Microsoft web pages that you can follow to learn more about LINQ. Some are a bit old but they still provide valuable information.
- Getting Started with LINQ in Visual Basic — http://msdn.microsoft.com/bb397910.aspx.
- Hooked on LINQ (a wiki with some useful information, particularly its “5 Minute Overviews”) ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.