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What is Entity Framework?

Posted On: 28/07/2013 07:16:34

Entity Framework is an Object Relational Mapper (ORM). It basically generates business objects and entities according to the database tables and provides the mechanism for:

  1. Performing basic CRUD (Create, Read, Update, Delete) operations.
  2. Easily managing "1 to 1", "1 to many", and "many to many" relationships.
  3. Ability to have inheritance relationships between entities.
Posted On: 28/07/2013 07:17:20
ADO.NET Entity Framework is an Object/Relational Mapping (ORM) framework that enables developers to work with relational database. It enabling developers to deal with data as objects and properties.Using the Entity Framework, developers issue queries using LINQ, then retrieve and manipulate data as strongly typed objects using C# or VB.Net.
Posted On: 28/07/2013 07:26:07
O/RM is an acronym that stands for object/relational mapping. Basically, an O/RM framework is used to persist model objects in a relational database and retrieve them. It uses metadata information to interface with the database. This way, your data-layer code knows nothing about the database structure. The O/RM tool becomes middleware that completely hides the complexity.

The heart of O/RM is the mapping—the mapping technique is what binds the object and relational worlds. By mapping, you express how a class and its properties are related to one or more tables in the database. This information is used by the O/RM tool’s engine to dynamically build SQL code that retrieves data and transforms it into objects. Similarly, by tracking changes to objects’ properties, it can use mapping data to send updates back to the database. The mapping information is generally expressed as an XML file. As an alternative, some O/RM tools use attributes on the classes and their properties to maintain mapping data.
Posted On: 28/07/2013 07:28:11
Advantage of Entity Framework: 

1. Productivity: 
Entity Framework can take up to 35 percent of the entire application code. It make the developer’s life easier than ever. In spite of its limitations, the designer integrated into Visual Studio dramatically simplifies the mapping process.

2. Maintainability: 
Since you have the fewer lines of code to fetch data from database,the fewer lines of code you have to maintain. This is particularly true in the big projects.

3. Performance: 
The complexity of O/RM introduces an obvious slowdown in performance. In entity framework first request to fetch data is little bit slow but after that is fast to fetch data from database.
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