What is include in Entity Framework?
As a performance measure, Include() allows you to indicate which related entities should be read from the database as part of the same query.
What is include and ThenInclude?
Description. You can chain multiple related objects to the query result by using the AlsoInclude and ThenInclude methods. The ThenInclude method moves the chaining level to the property included. It allows us to include related objects from the next level.
What is the use of include in Entity Framework?
The Entity Framework Core (EF) extension method Include provides us the ability to load additional data besides the entities we are querying for. For example: loading products along with their translations.
What is include in Linq to Entity?
Include is an extension method in the System.
How do I join Entity Framework?
Method Syntax First join the first two tables. Employees is the outer table and People is the inner table. Project the properties you want to in the output. Also include those properties, which you want to use in the join condition further down the query.
How does include work in Entity Framework?
Entity Framework When to Use Include
- Lazy loading is the process whereby an entity or collection of entities is automatically loaded from the database.
- Lazy loading is enabled by default in Entity Framework, and we can mark specific navigation properties or even whole entities as lazy by making them virtual.
How do I load entity framework?
To Invoke load method, first we use the DbContext. Entry method is used to gain access to a tracked entity. From the Entry , we can use the Reference or Collection method to get the reference to the navigational property. Then you can call the Load method to get the data from the database.
Should I use IQueryable or IEnumerable?
IEnumerable: IEnumerable is best suitable for working with in-memory collection (or local queries). IEnumerable doesn’t move between items, it is forward only collection. IQueryable: IQueryable best suits for remote data source, like a database or web service (or remote queries).
How to include entities in Entity Framework Core?
Entity Framework Core Tutorial Include & ThenInclude. Include. The Include method specifies the related objects to include in the query results. It can be used to retrieve some information from the database and also want to include related entities. Now let’s say we have a simple model which contains three entities.
When to use the include method in Entity Framework?
In Entity Framework, the Include method loads the related objects to include in the query results. It can be used to retrieve some information from the database and also want to include related entities. We have a simple model which contains two entities.
When to use query and collection in Entity Framework?
On the other hand, the Collection method should be used when an entity has a navigation property to a collection of other entities. The Query method provides access to the underlying query that Entity Framework will use when loading related entities.
Which is the best way to load Entity Framework?
Entity Framework supports three ways to load related data – eager loading, lazy loading and explicit loading. The techniques shown in this topic apply equally to models created with Code First and the EF Designer.