Microsoft Blazor by Peter Himschoot

Microsoft Blazor by Peter Himschoot

Author:Peter Himschoot
Language: eng
Format: epub, azw3
ISBN: 9781484259283
Publisher: Apress


Constructor Dependency Injection

Classes that need a dependency can simply state their dependencies in their constructor. The IoCC will examine the constructor and instantiate the dependencies before calling the constructor. And if these dependencies have their own dependencies, then the IoCC will also build them! For example, if the ProductsService has a constructor that takes an argument of type Dependency, as in Listing 4-8, then the IoCC will create an instance of type Dependency and will then call the ProductsService’s constructor with that instance. The ProductsService constructor then stores a reference to the dependency in some field, as in Listing 4-8. Should the ProductsService’s constructor take multiple arguments, then the IoCC will create an instance for each argument. Constructor injection is normally used for required dependencies.public class ProductsService {

private Dependency dep;



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