ImportMemberAttribute Class

Custom attribute that, when applied to an instance field of an aspect class, determines that this field should be bound to a method, event or property, of the target class of this aspect. Valid types for fields are a concrete Delegate (to bind to a method), Property<TValue> or Property<TValue, TIndex> (to bind to a property), or Event<TDelegate> (to bind to an event).

Inheritance Hierarchy

System.Object
  System.Attribute
    PostSharp.Aspects.Advices.Advice
      PostSharp.Aspects.Advices.ImportMemberAttribute

Namespace: PostSharp.Aspects.Advices
Assembly: PostSharp (in PostSharp.dll) Version: 4.3.48.0 (4.3.48.0)

Syntax

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public sealed class ImportMemberAttribute : Advice

The ImportMemberAttribute type exposes the following members.

Constructors

	Name	Description
	ImportMemberAttribute()	Initializes a new ImportMemberAttribute.
	ImportMemberAttribute(String)	Initializes a new instance of the ImportMemberAttribute class
	ImportMemberAttribute(String[])	Initializes a new ImportMemberAttribute.

Properties

	Name	Description
	Description	A human-readable description of the current advice. (Inherited from Advice.)
	IsRequired	Determines whether a build time error must be issued if the member to be imported is absent. If false, the binding field will be null in case the imported member is absent.
	LinesOfCodeAvoided	Reduction in the code lines count achieved by applying the advice instance to one code element. (Inherited from Advice.)
	MemberName	Obsolete. Name of the imported member.
	MemberNames	Array of possible names of imported member in the order of precedence.
	Order	Determines when the member should be imported: either before (BeforeIntroductions) or after (AfterIntroductions) members have been introduced by the current aspect. Default is BeforeIntroductions.

Extension Methods

	Name	Description
	QueryInterface<T>	Gets the implementation of a specified interface for the specified object. (Defined by QueryInterfaceExtensions.)

Remarks

Fields annotated with the ImportMemberAttribute custom attribute must be public and must not be read only.

At runtime, these fields are assigned to a delegate (in case of method binding) or a pair of delegates (in case of event or property binding) allowing to invoke the imported member.

When IsRequired property is set to true and the target type does not contain a member of the required name and signature, then a build error will be raised.

When multiple member names are specified, the first existing member satisfying all conditions is used.

Reference

PostSharp.Aspects.Advices Namespace

Other Resources

Conceptual Documentation: Introducing, Overriding and Importing Members