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 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 does DbContext SaveChanges return?
Returns. The number of state entries written to the underlying database. This can include state entries for entities and/or relationships.
What is the use of DbContext in Entity Framework?
The class that derives DbContext is called context class in entity framework. DbContext is an important class in Entity Framework API. It is a bridge between your domain or entity classes and the database….DbContext Properties.
| Method | Usage |
|---|---|
| Database | Provides access to database related information and operations. |
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.
How do I stop lazy loading?
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….Rules for lazy loading:
- context. Configuration.
- context. Configuration.
- Navigation property should be defined as public, virtual.
What is the difference between code first and database first?
The main difference between Code First approach and Database First approach is that the Code First enables you to write entity classes and its properties first without creating the database design first.
What is DbSet in Entity Framework Core?
In Entity Framework Core, the DbSet represents the set of entities. In a database, a group of similar entities is called an Entity Set. The DbSet enables the user to perform various operations like add, remove, update, etc. on the entity set.
What is SaveChanges Entity Framework?
In Entity Framework, the SaveChanges() method internally creates a transaction and wraps all INSERT, UPDATE and DELETE operations under it. Thus, each SaveChanges() method call creates a new transaction and executes database commands within it.
What’s the difference between SaveChanges () and AcceptAllChanges ()?
The AcceptAllChanges method is useful in the scenario where a transaction has failed and a user wants to retry. If you call SaveChanges() or SaveChanges(true),the EF simply assumes that if its work completes okay, everything is okay, so it will discard the changes it has been tracking, and wait for new changes.
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.
What is application DbContext?
The DbContext class is an integral part of Entity Framework. An instance of DbContext represents a session with the database which can be used to query and save instances of your entities to a database. DbContext is a combination of the Unit Of Work and Repository patterns.
