What is difference between DbSet and DbContext?
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. So it makes perfect sense that you will get a combination of both!
What does DbContext mean?
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 is DataContext in EF?
The DataContext is the source of all entities mapped over a database connection. It tracks changes that you made to all retrieved entities and maintains an “identity cache” that guarantees that entities retrieved more than one time are represented by using the same object instance.
What is DbContext in EF 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. Entity Framework Core does not support multiple parallel operations being run on the same DbContext instance.
Why do we use DbContext in MVC?
DbContext is a class provided by Entity Framework to establish connection to database, query the db and close connection. Extending DbContext permits to define database model with DbSet (specific Set mapped to a table or more), create a database, query a database…
Should DbContext be reused?
The thing you want to reuse is the DbContext code + all EF logic. You don’t want to (can’t) reuse same DbContext instance across projects (apps). So to reuse the code, you just need to put all of your Model + DBContext in a project. Then in other projects, you can add reference to it.
Is DbContext a 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.
Is DbContext managed?
The problem is there’s no clear-cut “yes” or “no” answer to “Is DbContext unmanaged?”. It’s a CLR class, so it’s definitely a managed object.
Is DbContext cached?
The DbContext is a cache. Keeping hold of it for a long time is a terrible idea… it will slowly consume your application’s memory hanging on to data that may well be stale. It was not designed to be used in the way you propose. Don’t do it.
What happens if you don’t dispose DbContext?
Don’t dispose DbContext objects. Although the DbContext implements IDisposable , you shouldn’t manually dispose it, nor should you wrap it in a using statement. DbContext manages its own lifetime; when your data access request is completed, DbContext will automatically close the database connection for you.
Do you have to dispose DbContext?
As Daniel mentioned, you don’t have to dispose the dbContext. From the article: Even though it does implement IDisposable, it only implements it so you can call Dispose as a safeguard in some special cases. By default DbContext automatically manages the connection for you.