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How do I dispose of 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.
Is the 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.
Is DbContext managed?
The way your DbContext is managed should be independent of the application type. While most applications today start off as web applications, the strategy you choose to manage the lifetime of your DbContext shouldn’t assume that your service method will be called from within the context a web request.
What is dispose in Entity Framework?
Dispose() Calls the protected Dispose method. Dispose(Boolean) Disposes the context. The underlying ObjectContext is also disposed if it was created is by this context or ownership was passed to this context when this context was created.
Why is DbContext scoped?
It also allows you to use a single context in a certain scope, which has clear advantages, such as running code in a single business transaction, and being able to pass around entities, since they originate from the same DbContext .
What is DbContext class in MVC?
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 the difference between ObjectContext and DbContext?
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. |
When to use dispose as a safeguard in dbcontext?
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. One might want to dispose of the context in some cases. On the simplistic terms of the OP example, the using keyword is enough.
When to not call dispose in Entity Framework?
A separate Dispose statement can be missed when an exception occurs earlier. Also, in most common cases, not calling Dispose at all (either implicitly or explicitly) isn’t harmful. See e.g. Entity Framework 4 – lifespan/scope of context in a winform application.
Which is repository implements IDisposable and dispose dbcontext?
Repository implements IDisposable and dispose DbContext. So I used it as: It is implementation of my controller in asp.net core application. I use EntityFrameworkCore.Triggers nuget which allows me to know if entity is changed or not and I can set up some properties before saving.
Why are my dbcontext instances not thread safe?
This is usually caused by different threads using the same instance of DbContext, however instance members are not guaranteed to be thread safe. When concurrent access goes undetected, it can result in undefined behavior, application crashes and data corruption.