Class ImportMemberAttribute

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

object

Attribute

Advice

ImportMemberAttribute

Namespace: PostSharp.Aspects.Advices

Assembly: PostSharp.dll

Syntax

[AttributeUsage(AttributeTargets.Field, AllowMultiple = false)]
public sealed class ImportMemberAttribute : Advice

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.

Constructors

Name	Description
ImportMemberAttribute(string)	Initializes a new ImportMemberAttribute and specifies a single name for the member to import.
ImportMemberAttribute(params string[])	Initializes a new ImportMemberAttribute and specifies several possible names for the member to import.

Properties

Name	Description
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.
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.