ActivatorUtilities Class¶
Helper code for the various activator services.
- Namespace
Microsoft.Extensions.DependencyInjection
- Assemblies
- Microsoft.Extensions.DependencyInjection.Abstractions
Syntax¶
public class ActivatorUtilities
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class
Microsoft.Extensions.DependencyInjection.
ActivatorUtilities
Methods¶
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CreateFactory
(System.Type, System.Type[])¶ Create a delegate that will instantiate a type with constructor arguments provided directly and/or from an
System.IServiceProvider
.Arguments: - instanceType (System.Type) – The type to activate
- argumentTypes (System.Type<System.Type>[]) – The types of objects, in order, that will be passed to the returned function as its second parameter
Return type: Returns: A factory that will instantiate instanceType using an
System.IServiceProvider
and an argument array containing objects matching the types defined in argumentTypespublic static ObjectFactory CreateFactory(Type instanceType, Type[] argumentTypes)
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CreateInstance
(System.IServiceProvider, System.Type, System.Object[])¶ Instantiate a type with constructor arguments provided directly and/or from an
System.IServiceProvider
.Arguments: - provider (System.IServiceProvider) – The service provider used to resolve dependencies
- instanceType (System.Type) – The type to activate
- parameters (System.Object<System.Object>[]) – Constructor arguments not provided by the <em>provider</em>.
Return type: System.Object
Returns: An activated object of type instanceType
public static object CreateInstance(IServiceProvider provider, Type instanceType, params object[] parameters)
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CreateInstance<T>
(System.IServiceProvider, System.Object[])¶ Instantiate a type with constructor arguments provided directly and/or from an
System.IServiceProvider
.Arguments: - provider (System.IServiceProvider) – The service provider used to resolve dependencies
- parameters (System.Object<System.Object>[]) – Constructor arguments not provided by the <em>provider</em>.
Return type: T
Returns: An activated object of type T
public static T CreateInstance<T>(IServiceProvider provider, params object[] parameters)
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GetServiceOrCreateInstance
(System.IServiceProvider, System.Type)¶ Retrieve an instance of the given type from the service provider. If one is not found then instantiate it directly.
Arguments: - provider (System.IServiceProvider) – The service provider
- type (System.Type) – The type of the service
Return type: System.Object
Returns: The resolved service or created instance
public static object GetServiceOrCreateInstance(IServiceProvider provider, Type type)
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GetServiceOrCreateInstance<T>
(System.IServiceProvider)¶ Retrieve an instance of the given type from the service provider. If one is not found then instantiate it directly.
Arguments: provider (System.IServiceProvider) – The service provider used to resolve dependencies Return type: T Returns: The resolved service or created instance public static T GetServiceOrCreateInstance<T>(IServiceProvider provider)
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