Does TransactionScope work with Entity Framework?
Transactions namespace was used to handle transactions in the Entity Framework using TransactionScope and the Entity Framework uses this transaction to save the changes in the database. Entity Framework 6.0 introduced two new APIs to maintain the transaction.
What is the TransactionScope class and how would you use it?
The TransactionScope class provides a simple way to mark a block of code as participating in a transaction, without requiring you to interact with the transaction itself. A transaction scope can select and manage the ambient transaction automatically.
How do you use TransactionScope?
Using the TransactionScope
- Add a reference to System.
- Add a using System.
- Make sure that the Microsoft Distributed Transaction Coordinator is running.
- Create the TransactionScope object in a using statement.
- Complete all updates within the scope defined by the {} of the TransactionScope’s using statement.
What is TransactionScope in C#?
The TransactionScope makes the block of code as a part of a transaction without requesting c# developers to connect with the transaction itself. A TransactionScope is allowed to select and manage ambient transaction automatically.
What is a DbContext class?
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.
Is EF core SaveChanges transaction?
This feature was introduced in EF Core 5.0. When SaveChanges is invoked and a transaction is already in progress on the context, EF automatically creates a savepoint before saving any data. Savepoints are points within a database transaction which may later be rolled back to, if an error occurs or for any other reason.
What does @transactional annotation do?
The @Transactional annotation makes use of the attributes rollbackFor or rollbackForClassName to rollback the transactions, and the attributes noRollbackFor or noRollbackForClassName to avoid rollback on listed exceptions. The default rollback behavior in the declarative approach will rollback on runtime exceptions.
What is enlist transaction?
You can use the EnlistTransaction method to enlist in a distributed transaction. Because it enlists a connection in a Transaction instance, EnlistTransaction takes advantage of functionality available in the System.
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. |
How does DbContext work in Entity Framework?
Entity Framework – DbContext
- Materialize data returned from the database as entity objects.
- Track changes that were made to the objects.
- Handle concurrency.
- Propagate object changes back to the database.
- Bind objects to controls.
When should I call SaveChanges?
Accepted Answer If you need to enter all rows in one transaction, call it after all of AddToClassName class. If rows can be entered independently, save changes after every row. Database consistence is important.
Does SaveChanges commit?
In Entity Framework, the SaveChanges() method internally creates a transaction and wraps all INSERT, UPDATE and DELETE operations under it. Multiple SaveChanges() calls, create separate transactions, perform CRUD operations and then commit each transaction.