In Entity Framework Core, the DbSet represents the set of entities. In a database, a group of similar entities is called an Entity Set. The DbSet enables the user to perform various operations like add, remove, update, etc. on the entity set.
What is difference between 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.
What is a DbContext?
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 DbSet used for?
A DbSet represents the collection of all entities in the context, or that can be queried from the database, of a given type. DbSet objects are created from a DbContext using the DbContext. Set method.
Why do we use DbSet?
The DbSet Add method is used to add the given entity to the context with the Added State. When the changes are saved (i.e. when the SaveChanges method is called), the entity which is in the Added state is inserted into the database.
What is difference between DbContext and ObjectContext?
The main difference between DBContext and ObjectContext is that DBContext is a wrapper of the ObjectContext and denotes the most commonly used features of the ObejctContext, while the ObejctContext is a part of the core Entity Framework API that allows performing operations on the database using strongly typed entity
What is IQueryable and IEnumerable in C#?
Querying data from a database, IEnumerable execute a select query on the server side, load data in-memory on a client-side and then filter data. Querying data from a database, IQueryable execute the select query on the server side with all filters.
What is DbContext C#?
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.
What is dbContextOptions?
The dbContextOptions carries the configuration information needed to configure the DbContext. The dbContextOptions can also be configured using the OnConfiguring method. This method gets the DbContextOptionsBuilder as its argument. It is then used to create the dbContextOptions.
How do I disable proxy entity?
Proxy creation can be disabled by using the ProxyCreationEnabled flag. In the following example I have put it in the constructor of the context. We can also disable creation of a proxy at the time of object creation of the context instead of disabling it at the constructor of the context.
How does DbContext work in Entity Framework?
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.
What is the degree of relationship in database?
In DBMS, a degree of relationship represents the number of entity types that associate in a relationship. For example, we have two entities, one is a student and the other is a bag and they are connected with the primary key and foreign key.
What is database entity?
An entity in DBMS (Database management System) is a real-world thing or a real-world object which is distinguishable from other objects in the real world. For example, a car is an entity. An attribute of an entity gives us information about the characteristic features of an entity.
What is a relationship set?
A relationship set is a set of relationships of the same type. Formally it is a mathematical relation on (possibly non-distinct) sets. If are entity sets, then a relationship set R is a subset of. where is a relationship. For example, consider the two entity sets customer and account.
