Reading Notes-LINQ to Objects Using C #4.0 (1)

Document directory

• Chapter 1 Introduction to LINQ

There are a few articles about LINQ in the garden, so I want to create a series. Let's take a look at how to use LINQ to Objects.

Here, the blogger is reading "LINQ to Objects Using C #4.0" written by Troy Magennis.

This series of articles provides simplified content for this book.

Chapter 1 Introduction to LINQ

What is LINQ?

Language Integrated query (directly translated as Language integration query) reads as link (zero grams, isn't it easy? ^)

As an Enhanced Function launched by Microsoft, LINQ is used to process some data. The. NET language and various data sources provide a layer of encoding abstraction between the. NET language.

One of the goals of the introduction of LINQ is to reduce Code complexity and enhance code readability. LINQ is open and scalable.

Supports LINQ from. NET3.5 and is further extended in. net4.

Covered points

• LINQ to Objects
• LINQ to XML
• LINQ to Entities (part of the Entity Framework)
• LINQ to SQL
• PLINQ
• LINQ to Datasets

Standard query operation table (. net4)

Operation Type	Standard query operation name
Aggregation	Aggregate, average, Count, longcount, Max, Min, Sum
Conversion	Asenumerable, cast, oftype, toarray, todictionary, tolist, tolookup
Element	Defaultifempty, elementat, elementatordefault, first, Firstordefault, last, lastordefault, single, singleordefault
Equality	Sequenceequal
Generation	Empty, range, repeat
Grouping	Groupby, tolookup
Joining	Groupjoin, join
Merging	Zip
Ordering	Orderby, thenby, orderbydescending, thenbydescending, reverse
Projection	Select, selectworkflow
Partitioning	Skip, skipwhile, take, takewhile
Quantifiers	All, any, contains
Restriction	Distinct, where
Set	Concat, Except T, Intersect, Union

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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