ServiceCreatorCallback Delegate
Provides a callback mechanism that can create an instance of a service on demand.
Assembly: System (in System.dll)
[ComVisibleAttribute(true)] [HostProtectionAttribute(SecurityAction::LinkDemand, SharedState = true)] public delegate Object^ ServiceCreatorCallback( IServiceContainer^ container, Type^ serviceType )
Parameters
- container
-
Type:
System.ComponentModel.Design::IServiceContainer^
The service container that requested the creation of the service.
- serviceType
-
Type:
System::Type^
The type of service to create.
Return Value
Type: System::Object^The service specified by serviceType, or null if the service could not be created.
ServiceCreatorCallback provides a mechanism to publish services that you can request to have created when needed, rather than the service being created immediately when the designer loads. You can use a callback function if the service is not essential and may not be used. A service published by using a ServiceCreatorCallback does not use as many additional resources if it is not requested and created. To use a callback function to publish your service, pass a ServiceCreatorCallback to the AddService method of an IServiceContainer.
The following code example shows how to publish a service using a callback function.
// The following code shows how to publish a service using a callback function. // Creates a service creator callback. ServiceCreatorCallback^ callback1 = gcnew ServiceCreatorCallback( this, &Sample::myCallBackMethod ); // Adds the service using its type and the service creator callback. serviceContainer->AddService( myService::typeid, callback1 );
Available since 1.1