Table of Contents
Does TransactionScope work with Entity Framework?
Entity Framework is already operating within a TransactionScope. The connection object in the transaction passed is null. That is, the transaction is not associated with a connection – usually this is a sign that that transaction has already completed.
How does EF support transaction?
Entity Framework internally maintains transactions when the SaveChanges() method is called. It means the Entity Framework maintains a transaction for the multiple entity insert, update and delete in a single SaveChanges() method.
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.
How do I save changes in Entity Framework?
SaveChanges method saves all changes made in the context of the database.
- You can add, modify, and remove data using your context and entity classes.
- SaveChanges method automatically call DetectChanges method to discover any changes to entity instances before saving to the underlying database.
What is SQL transaction?
A transaction is a logical unit of work that contains one or more SQL statements. A transaction is an atomic unit. The effects of all the SQL statements in a transaction can be either all committed (applied to the database) or all rolled back (undone from the database).
What is isolation level in SQL?
Isolation is the separation of resource or data modifications made by different transactions. Isolation levels are described for which concurrency side effects are allowed, such as dirty reads or phantom reads.
Should I use Entity Framework?
Conclusion. EF should be considered a great ORM framework which allows faster development, easier and quicker operations to the DB, as long as you are careful and know how it works in order to avoid certain mistakes and create performance problems.
Is SaveChanges a transaction?
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.
How do I update my entity?
The steps to update an existing entity are quite simple. First retrieve an instance of the entity from the EntitySet (in our case ObjectSet), then edit the properties of the Entity and finally call SaveChanges() on the context.
What are the four levels of isolation in SQL?
InnoDB offers all four transaction isolation levels described by the SQL:1992 standard: READ UNCOMMITTED , READ COMMITTED , REPEATABLE READ , and SERIALIZABLE .