What does lazy loading mean in Entity Framework?
Entity Framework – Lazy Loading. Lazy loading is the process whereby an entity or collection of entities is automatically loaded from the database the first time that a property referring to the entity/entities is accessed.
When is child entity loaded in Entity Framework?
It is the default behavior of an Entity Framework, where a child entity is loaded only when it is accessed for the first time. It simply delays the loading of the related data, until you ask for it. For example, when we run the query given below, UserDetails table will not be loaded along with the User table.
How is eager loading used in Entity Framework?
Eager Loading helps you to load all your needed entities at once; i.e., all your child entities will be loaded at single database call. This can be achieved, using the Include method, which returs the related entities as a part of the query and a large amount of data is loaded at once.
When to use lazy loading or eager loading?
When to use what Use Eager Loading when the relations are not too much. Use Eager Loading when you are sure that you will be using related entities with the main entity everywhere. Use Lazy Loading when you are using one-to-many collections. Use Lazy Loading when you are sure that you are not using related entities instantly.
What does lazy loading mean in Microsoft Docs?
Property access triggers lazy loading, so more entities get serialized. On those entities properties are accessed, and even more entities are loaded. It’s a good practice to turn lazy loading off before you serialize an entity.
How is lazy loading achieved in Poco entity types?
When using POCO entity types, lazy loading is achieved by creating instances of derived proxy types and then overriding virtual properties to add the loading hook. Lazy loading is pretty much the default.
Is it possible to load multiple related entities?
It is also possible to eagerly load multiple levels of related entities. The queries below show examples of how to do this for both collection and reference navigation properties. It is not currently possible to filter which related entities are loaded. Include will always bring in all related entities.