What is DbContext C#?
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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.
Why do we use DbContext in MVC?
DbContext is a class provided by Entity Framework to establish connection to database, query the db and close connection. Extending DbContext permits to define database model with DbSet (specific Set mapped to a table or more), create a database, query a database…
Why do we use DbContext?
The class that derives DbContext is called context class in entity framework. DbContext is an important class in Entity Framework API. It is a bridge between your domain or entity classes and the database….DbContext Properties.
Method | Usage |
---|---|
Database | Provides access to database related information and operations. |
What is the use of DbContext in MVC?
You can think of DbContext as the database connection and a set of tables, and DbSet as a representation of the tables themselves. The DbContext allows you to link your model properties (presumably using the Entity Framework) to your database with a connection string.
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.
How do I use a dbcontext?
You can use a DbContext associated to a model to: Write and execute queries Materialize query results as entity objects Track changes that are made to those objects Persist object changes back on the database Bind objects in memory to UI controls This page gives some guidance on how to manage the context class.
What is dbcontext instance in Salesforce?
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.
How do you define a dbcontext derived class?
Defining a DbContext derived class The recommended way to work with context is to define a class that derives from DbContext and exposes DbSet properties that represent collections of the specified entities in the context. If you are working with the EF Designer, the context will be generated for you.
What is the difference between dbcontext and ObjectContext?
Working with ObjectContext was a little complex. DbContext is a wrapper around ObjectContext which is actually similar to ObjectContext and is useful and easy in all the development models such Code First, Model First and Database First. Adding a new entity. Changing or updating the property values of an existing entity.