Introduction to Linq

The Language Integrated Query (LINQ) is microsoft framework feature. Which allows the developers to query from an object, xml and sql.

The developers can write the query to retrieve the from the objects/xml/sql and no need to write the logic to iterate or do it in the back end.

- LINQ to object
- LINQ to XML
- LINQ to SQL

For example in an array you are having lot of elements. but you want to filter the data on some criteria. Then it has to be looped in order to get the results.

For overcoming this kind of work microsoft allows you to write the query to retrieve from the array and you can mention the condition in the where clause.

int[] nums = new int[] {0,1,2};

var res = from a in nums

where a < 3

orderby a

select a;

foreach(int i in res)

Console.WriteLine(i);

You can get more idea in the following link.

http://msdn.microsoft.com/en-us/library/bb308959.aspx

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3 Replies

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Senthilkumar14y ago
The Language Integrated Query (LINQ) is microsoft framework feature. Which allows the developers to query from an object, xml and sql.

The developers can write the query to retrieve the from the objects/xml/sql and no need to write the logic to iterate or do it in the back end.

- LINQ to object
- LINQ to XML
- LINQ to SQL

For example in an array you are having lot of elements. but you want to filter the data on some criteria. Then it has to be looped in order to get the results.

For overcoming this kind of work microsoft allows you to write the query to retrieve from the array and you can mention the condition in the where clause.

int[] nums = new int[] {0,1,2};
var res = from a in nums
where a < 3
orderby a
select a;

foreach(int i in res)
Console.WriteLine(i);

You can get more idea in the following link.

http://msdn.microsoft.com/en-us/library/bb308959.aspx

If you found this post is helpful then mark it as "Accepted Answer"

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Vulpes14y ago
Also check our recommended articles in the sidebar to the right of this thread.
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chirag pandya14y ago
Please check following link

http://www.codeproject.com/Articles/26657/Simple-LINQ-to-SQL-in-C
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