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LINQ PPT.pptx
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- 2. WHAT IS LINQ LINQ is known as Language Integrated Query .The beauty of LINQ is it provides the ability to .NET languages(like C#,VB.NET, etc.) to generate queries to retrieve data from the data source such as collections, ADO.Net DataSet, XML Docs, web service and MS SQL Server and other databases. L I N Q Object Collection LINQ to object ADO.Net Database LINQ to dataset SQL Database LINQ to SQL Entity Frame work LINQ to Entities Other data source By implementing IQueryable Devloper Uses Query
- 3. WHYWE USE LINQ LINQ (Language-Integrated Query) simplifies working with collections in C#. It replaces traditional loops and delegates with a more concise and readable query syntax. LINQ provides type checking at compile time, catching errors early in development. The query syntax is easy to understand, improving code readability and maintainability. LINQ can work with various data sources like XML, SQL, entities, objects, etc. You can use a single LINQ query for different types of databases, no need to learn different languages. It is a powerful tool for effective data manipulation and problem-solving in C# applications.
- 4. HOW DOES LINQWORK understand how exactly the LINQ works in .NET Framework, please have a look at the following diagram which shows how the LINQ works. LINQ allows queries in C#, VB.NET, J#, F#, etc., while the LINQ Provider converts queries to formats understandable by data sources (e.g., LINQ to SQL for SQL Server, LINQ to XML for XML documents).
- 5. ADVANTAGE OF LINQ Familiar language: Developers don't have to learn a new query language for each type of data source or data format. Less coding: It reduces the amount of code to be written as compared with a more traditional approach. Readable code: LINQ makes the code more readable so other developers can easily understand and maintain it. Standardized way of querying multiple data sources: The same LINQ syntax can be used to query multiple data sources.
- 6. DISADVANTAGE OF LINQ Required to recompile and redeploy whenever changes are made by user. Impact to performance, high network traffic usage. No clear view of permission.
- 7. WAYSTOWRITE LINQ QUERY InLINQ there are three ways to write query Query Syntax Method Mixed Syntax(Query + Method) In order to write a LINQ query, we need the following three things Data Source (In-Memory Objects, SQL Server, XML Document, etc) Query Execution of the Query
- 8. Query Syntax This isone of the easy ways to write complex LINQ queries in an easy and readable format. The syntax for this type of query is very much similar to SQL Query. If you are familiar with SQL queries then it is going to be easy for you to write LINQ queries using this query syntax. The syntax is given below.
- 9. Method Syntax Method syntaxis increasingly popular for writing LINQ queries due to its use of lambda expressions to define conditions. It excels at simple read-write operations but can be challenging for complex queries. It involves chaining multiple methods with dots (.) for query construction:-
- 10. Mixed Syntax This isthe combination of both Query and Method syntax. The syntax is given below.
- 11. LINQ Operator The LINQOperators are nothing but a set of extension methods that are used to write LINQ Query. These LINQ extension methods provide lots of very useful features which we can apply to the data source. Some of the features are filtering the data, sorting the data, grouping the data, etc. In LINQ, the operators are divided into the following categories: Ordering Operator Grouping Operator Filtering Operator etc.
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