Prism MEF example

Related Attributes

These attributes are under namespace System.ComponentModel.Composition

• Import The attribute can be used on fields, properties, parameters. E.g. If a property is defined with the attribute, the property will be created automatically when the object is created.

• ImportingConstructor For previous example, how to create an instance of EmployeeGridViewModel? It will need attribute ImportingConstructor.

• Export: This attribute is used to register a class into MEF. Next question is how to create an instance of IEmployeeService, look this:

These code registers EmployeeService as an impelement of type IEmployeeService.

• PartCreationPolicy The attribtue is used with attribute Export, tell MEF the class creation policy, implment a singleton policy or create an instance always.