<pedrocorreia.net ⁄>
 

<An Introduction to LINQ - Part 1 ⁄ >




clicks: 3981 3981 2006-09-28 2006-09-28 goto programacao myNews programacao  Bookmark This Bookmark This


Most programmers today are required to integrate some sort of data into their applications. Often, you have to take data from multiple sources such as memory collections, relational databases, XML files, etc. With the current implementation of .NET Framework, getting to this data is often tedious and requires familiarity with multiple data access technologies and XML APIs. To make matters worse, all data sources have different means of querying the data in them: SQL for databases, XQuery for XML, LDAP queries for Active Directory etc. In short, today's data access story lacks a unified approach to accessing data from disparate data sources, which is exactly what the LINQ (Language INtegrated Query) family of technologies are intended to solve. In this series of article, you will understand all about LINQ including the basics of LINQ to performing data access using LINQ. The first installment of this series will focus on the basics of LINQ introducing the new features of C# 3.0 and how they can be used in conjunction with LINQ.

Introduction to LINQ

The official goal of LINQ family of technologies is to add "general purpose query facilities to the .NET Framework that apply to all sources of information, not just relational or XML data". One of the nice things about LINQ is that it integrates seamlessly with the existing .NET languages such as C#, VB.NET because the underlying LINQ API is just nothing but a set of .NET classes that operate like any other .NET class. In addition, the query functionality is not just restricted to SQL or XML data; you can apply LINQ to query any class as long as that class implements IEnumerable class.

As mentioned before, LINQ is a family of technologies that provide querying features and class patterns that DLinq and XLinq. DLinq (also referred to as LINQ to SQL) is specifically the version of LINQ that focuses on querying data from relational data sources. XLinq (LINQ to XML) is that aspect of LINQ that is geared towards querying XML data. To run the code samples supplied with this article, you need Visual Studio 2005 Professional RTM as well as LINQ May 2006 Community Technology Preview.



este é só um excerto do artigo, para aceder ao artigo completo, clique no link em baixo:
this is just a small excerpt from the article, to access the full article please click in the link below:

http://www.15seconds.com/issue/060713.htm




Subscribe News RSS  Subscribe News Updates by E-mail





myNews <myNews show="rand" cat="programacao" ⁄>

RouterJs: easy routing for your ajax Web applications new ...

RouterJs is a simple router for your ajax web apps. It's build upon History.js which means that Rout (...)

clicks: 18970 18970 2012-05-14 2012-05-14 goto url (new window) haithembelhaj.g... goto myNews programacao


Backbone computed properties new ...

This gist shows one way to implement read- and write-enabled computed properties on a Backbone Model (...)

clicks: 18562 18562 2012-05-13 2012-05-13 goto url (new window) https://gist.gi... goto myNews programacao


Create Instagram Filters With PHP new ...

In this tutorial, I'll demonstrate how to create vintage (just like Instagram does) photos with PHP (...)

clicks: 18663 18663 2012-05-12 2012-05-12 goto url (new window) net.tutsplus.co... goto myNews programacao


Android Query new ...

Android-Query (AQuery) is a light-weight library for doing asynchronous tasks and manipulating UI el (...)

clicks: 18411 18411 2012-05-12 2012-05-12 goto url (new window) code.google.com... goto myNews programacao


HTML5 jQuery Paint Plugin new ...

Websanova Paint is a HTML5 canvas based jQuery plugin. It allows you to free paint on a canvas area (...)

clicks: 29798 29798 2012-05-12 2012-05-12 goto url (new window) websanova.com/t... goto myNews programacao


Real-time Applications With Node.js and Socket.IO new ...

Hey everyone! Sorry about the long pause since the last blog post, life has been quite hectic for th (...)

clicks: 18960 18960 2012-05-11 2012-05-11 goto url (new window) codingcookies.c... goto myNews programacao


Sass vs. LESS vs. Stylus: Preprocessor Shootout new ...

CSS3 preprocessors are languages written for the sole purpose of adding cool, inventive features to (...)

clicks: 18418 18418 2012-05-11 2012-05-11 goto url (new window) net.tutsplus.co... goto myNews programacao


Gettings to know Backbone.ks new ...

In this series, we're going to learn how to build a fully functional contacts manager using Backbone (...)

clicks: 17522 17522 2012-05-10 2012-05-10 goto url (new window) net.tutsplus.co... goto myNews programacao