What is detach in Entity Framework?

What is detach in Entity Framework?

Deleted: the entity is being tracked by the context and exists in the database, but has been marked for deletion from the database the next time SaveChanges is called. Detached: the entity is not being tracked by the context.

How do you detach an entity?

An entity becomes detached (unmanaged) on following actions:

1. after transaction commit/rollback.
2. by calling EntityManager. detach(entity)
3. by clearing the persistence context with EntityManager. clear()
4. by closing an entity manager with EntityManager. close()
5. serializing or sending an entity remotely (pass by value).

What disconnected entities?

Entities that are not being tracked by a context are known as ‘disconnected’ entities. For most single-tier applications, where the user interface and database access layers run in the same application process, you will probably just be performing operations on entities that are being tracked by a context.

What is EntityState in Entity Framework?

The Entity state represents the state of an entity. An entity is always in any one of the following states. Added: The entity is marked as added. Deleted: The entity is marked as deleted.

What is a DbContext class?

A DbContext instance represents a combination of the Unit Of Work and Repository patterns such that it can be used to query from a database and group together changes that will then be written back to the store as a unit. DbContext is conceptually similar to ObjectContext.

What does EntityManager clear do?

The EntityManager. clear() operation can be used to clear the persistence context. This will clear all objects read, changed, persisted, or removed from the current EntityManager or transaction.

What is entry in Entity Framework?

Entry(Object) The entry provides access to change tracking information and operations for the entity. This method may be called on an entity that is not tracked. You can then set the State property on the returned entry to have the context begin tracking the entity in the specified state.

How do I turn off eager loading in Entity Framework?

To turn off lazy loading for a particular property, do not make it virtual. To turn off lazy loading for all entities in the context, set its configuration property to false.

What is LazyLoadingEnabled?

LazyLoadingEnabled is specifically set to true to prevent the related entities from loading in the context I’m using. A drug class has a list of drugidentity objects in it. public class Drug { public virtual List DrugIdentities { get; set; } }

What is DbSet and DbContext?

A DbContext corresponds to your database (or a collection of tables and views in your database) whereas a DbSet corresponds to a table or view in your database. So it makes perfect sense that you will get a combination of both!

What is Entity Framework?

Entity Framework is Microsoft’s recommended data access technology for new applications.

ADO.NET seems to refer directly to the technology for data sets and data tables.

Entity Framework is where all of the forward moving investment is being made,which has been the case for a number of years already.

What is Entity Framework navigation property?

Navigation properties are Entity Frameworks way of representing Foreign Key relationships inside the database. Navigation properties allow you to define relationships between entities (rows in your database) in a way that makes sense in an object oriented language.

What is MVC Entity Framework?

Entity Framework In MVC – Part One. Entity framework is an ORM ( Object Relational Mapping) tool. Object Relational Mapping (ORM) is a technique of accessing a relational database; .i.e., whatever has tables and store procedure these things we interact with database in class, method and property of the object format.