Table of Contents
What is ObjectContext in Entity Framework?
ObjectContext is a class that manages all the database operations, like database connection, and manages various entities of the Entity Model. We can say that ObjectContext is the primary class for accessing or working together with entities that are defined in the conceptual model.
What is Entity Framework Code?
It’s an Entity Framework feature. Code First adds a model builder that inspects your classes that the context is managing, and then uses a set of rules or conventions to determine how those classes and the relationships describe a model, and how that model should map to your database. All of this happens at runtime.
How do you change the code generation strategy in Entity Framework?
Open you model in the EF Designer, right-click on a blank section of the design surface and select Properties. In the Properties window change the Code Generation Strategy from None to Default.
How do I make Entity Framework Code First?
In this tutorial, you:
- Create an MVC web app.
- Set up the site style.
- Install Entity Framework 6.
- Create the data model.
- Create the database context.
- Initialize DB with test data.
- Set up EF 6 to use LocalDB.
- Create controller and views.
What is the difference between LINQ and Entity Framework?
LINQ to SQL allow you to query and modify SQL Server database by using LINQ syntax. Entity framework is a great ORM shipped by Microsoft which allow you to query and modify RDBMS like SQL Server, Oracle, DB2 and MySQL etc. It cannot generate database from model.
What is DbContext and DbSet?
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!
Which is better Entity Framework or LINQ to SQL?
LINQ to SQL allow you to query and modify SQL Server database by using LINQ syntax. Entity framework is a great ORM shipped by Microsoft which allow you to query and modify RDBMS like SQL Server, Oracle, DB2 and MySQL etc. It cannot generate database from model. …
Is Entity Framework only for SQL?
It only works with SQL Server Database. It generates a . dbml to maintain the relation. It has not support for complex type.
Which is better ObjectContext or dbcontext in Entity Framework?
DbContext does not support Compiled Queries. DbContext does not support self-tracking of Entities. DbContext is useful in Model First, Database First approach as well as Code First approach. ObjectContext can be used by Entity Framework 4.0 and below. DBContext can be used by Entity Framework 4.1 and above.
How to create new objects in ObjectContext class?
Creates a new ObjectSet instance that is used to query, add, modify, and delete objects of the specified entity type. Creates a new ObjectSet instance that is used to query, add, modify, and delete objects of the specified type and with the specified entity set name.
What do I need to know about objectcontextoptions?
Gets the ObjectContextOptions instance that contains options that affect the behavior of the ObjectContext. Gets or sets the default container name. Gets the metadata workspace used by the object context. Gets the object state manager used by the object context to track object changes.
Is the ObjectContext Class A thread safe class?
The ObjectContext class is not thread safe. The integrity of data objects in an ObjectContext cannot be ensured in multithreaded scenarios. The ObjectContext class is the primary class for interacting with data as objects that are instances of entity types that are defined in a conceptual model.