Getting References to Services

The term service describes a component that implements some infrastructure-related functionality that other components in the application may need to use; for example, services providing authorization, logging, or hardware communication functionality.

References to services are obtainable either programmatically or declaratively.

I. To obtain a reference to a service programmatically

1. Call the Get method of the Services collection of the WorkItem, passing in the type of service as shown in the following code.
   

IMyService myServ = (IMyService)myWorkItem.Services.Get(typeof(IMyService));

// or using generics
IMyService myServ = myWorkItem.Services.Get();

II. To obtain a reference to a service declaratively

1. Add the ServiceDependency attribute to a property in your class that that is of the type of service or interface you require, as shown in the following code.

   
   private IMyService service;
   
   [ServiceDependency]
   public IMyService MyService
   {
   set { service = value; }
   }