What is difference between DbContext and ObjectContext?

What is difference between DbContext and ObjectContext?

DbContext is nothing but a ObjectContext wrapper, we can say it is a lightweight alternative to the ObjectContext….ObjectContext VS DBContext.

ObjectContext	DbContext
ObjectContext can be used by Entity Framework 4.0 and below.	DBContext can be used by Entity Framework 4.1 and above.

What is the difference between ObjectContext and DbContext in relation to EF?

The main difference between DBContext and ObjectContext is that DBContext is a wrapper of ObjectContext and denotes most commonly used features of ObejctContext, while ObejctContext is a part of core Entity Framework API that allows in performing operations on the database using strongly typed entity classes.

What is the difference between DbContext and DbSet?

2 Answers. Intuitively, 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.

What is DbContext C#?

DbContext is an important class in Entity Framework API. It is a bridge between your domain or entity classes and the database. DbContext is the primary class that is responsible for interacting with the database. Querying: Converts LINQ-to-Entities queries to SQL query and sends them to the database.

What is DbContext in .NET core?

A DbContext instance represents a session with the database and can be used to query and save instances of your entities. DbContext is a combination of the Unit Of Work and Repository patterns.

What is IQueryable and IEnumerable in C#?

Querying data from a database, IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter data. Querying data from a database, IQueryable execute the select query on the server side with all filters.

How can create DbContext file in MVC?

In this tutorial, you:

1. Create an MVC web app.
2. Set up the site style.
3. Install Entity Framework 6.
4. Create the data model.
5. Create the database context.
6. Initialize DB with test data.
7. Set up EF 6 to use LocalDB.
8. Create controller and views.

Which of the following method of DbContext is used to save entities to the database?

SaveChanges()
SaveChanges() Saves all changes made in this context to the database. This method will automatically call DetectChanges() to discover any changes to entity instances before saving to the underlying database.

What is the basic job of a DbSet in C#?

A DbSet represents the collection of all entities in the context, or that can be queried from the database, of a given type.

Is DbContext thread safe?

DbContext is not thread-safe. Do not share contexts between threads. Make sure to await all async calls before continuing to use the context instance. An InvalidOperationException thrown by EF Core code can put the context into an unrecoverable state.

What is DbContext used for?

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.

Can DbContext be Singleton?

First, DbContext is a lightweight object; it is designed to be used once per business transaction. Making your DbContext a Singleton and reusing it throughout the application can cause other problems, like concurrency and memory leak issues. And the DbContext class is not thread safe.