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Linq to Entity

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Downloads: 276
Released: Mar 18, 2010
Updated: Mar 18, 2010 by wfkallis
Dev status: Beta Help Icon

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Source Code Linq to Entity
source code, 152K, uploaded Mar 18, 2010 - 276 downloads

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The Entity Framework enables developers to work with data in the form of domain-specific objects and properties, such as customers and customer addresses, without having to think about the underlying database tables and columns where this data is stored. For more information, see Entity Data Model. LINQ allows developers to formulate set-based queries in their application code, without having to use a separate query language. Through the Object Services infrastructure of Entity Framework, ADO.NET exposes a common conceptual view of data, including relational data, as objects in the .NET environment. This makes the object layer an ideal target for LINQ support. This LINQ technology, LINQ to Entities, allows developers to create flexible, strongly typed queries against the Entity Framework object context by using LINQ expressions and the LINQ standard query operators directly from the development environment. The queries are expressed in the programming language itself and not as string literals embedded in the application code, as is usually the case in applications written on the Microsoft .NET Framework version 2.0. Syntax errors as well as errors in member names and data types will be caught by the compiler and reported at compile time, reducing the potential for type problems between the Entity Data Model and the application.
LINQ to Entities queries use the Object Services infrastructure. The ObjectContext class is the primary class for interacting with an Entity Data Model as CLR objects. The developer constructs a generic ObjectQuery instance through the ObjectContext. The ObjectQuery generic class represents a query that returns an instance or collection of typed entities. The returned entity objects are updatable and are located in the object context. This is also true for entity objects that are returned as members of anonymous types.

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