Conditionally registers that registration will be used every time a
TService requested and where the supplied predicate
returns true. The predicate will only be evaluated a finite number of times; the predicate is
unsuited for making decisions based on runtime conditions.
Namespace: SimpleInjector
Assembly: SimpleInjector (in SimpleInjector.dll) Version: 5.3.0
Syntax
public void RegisterConditional<TService>( Registration registration, Predicate<PredicateContext> predicate )
Parameters
- registration
- Type: SimpleInjectorRegistration
The Registration instance to register. - predicate
- Type: SystemPredicatePredicateContext
The predicate that determines whether the registration can be applied for the requested service type. This predicate can be used to build a fallback mechanism where multiple registrations for the same service type are made. Note that the predicate will be called a finite number of times and its result will be cached for the lifetime of the container. It can't be used for selecting a type based on runtime conditions.
Type Parameters
- TService
- The base type or interface to register. This can be an open-generic type.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | Thrown when one of the arguments is a null reference. |
| InvalidOperationException | Thrown when this container instance is locked and can not be altered. |
See Also