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This article mainly explains the "LINQ query how to use", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "LINQ query how to use" it!

LINQ query has become a first-class programming concept in A. NET, and the data to be queried can be XML (LINQ to XML), Databases (LINQ to SQL, LINQ to Dataset, LINQ to Entities), and LINQ to Objects. LINQ is also extensible, allowing you to create custom LINQ data providers (such as LINQ to Amazon, LINQ to NHibernate, LINQ to LDAP).

Here I'll discuss some of the new language features and improvements in clipping 3.0 that make LINQ so powerful that you can write code like this:

Var result = from c in Customers where c.City = = Boston "orderby c.LastName descending select new {c.FirstName, c.LastName, c.Address}

Remember, if you want to use LINQ queries, you need to install Visual Studio 2008 (. Net 3.5).

Public class Point {private int _ x, _ y; public int X {get {return _ x;} set {_ x = value;}} public int Y {get {return _ y;} set {_ y = value;}

The above code simply defines a class with two properties. Now, using the C # compiler in VS2008, we can write easier with automatic attributes, which automatically generate private fields with get/set operations.

Public class Point {public int X {get; set;} public int Y {get; set;}} Thank you for reading, this is the content of "how to use LINQ query". After the study of this article, I believe you have a deeper understanding of how to use LINQ query, and the specific usage needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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