ExportAttribute Class
Specifies that a type, property, field, or method provides a particular export.
System::Attribute
System.ComponentModel.Composition::ExportAttribute
System.ComponentModel.Composition::InheritedExportAttribute
Assembly: System.ComponentModel.Composition (in System.ComponentModel.Composition.dll)
The ExportAttribute type exposes the following members.
| Name | Description | |
|---|---|---|
![]() ![]() | ExportAttribute() | Initializes a new instance of the ExportAttribute class, exporting the type or member marked with this attribute under the default contract name. |
![]() ![]() | ExportAttribute(String) | Initializes a new instance of the ExportAttribute class, exporting the type or member marked with this attribute under the specified contract name. |
![]() ![]() | ExportAttribute(Type) | Initializes a new instance of the ExportAttribute class, exporting the type or member marked with this attribute under a contract name derived from the specified type. |
![]() ![]() | ExportAttribute(String, Type) | Initializes a new instance of the ExportAttribute class, exporting the specified type under the specified contract name. |
| Name | Description | |
|---|---|---|
![]() ![]() | ContractName | Gets the contract name that is used to export the type or member marked with this attribute. |
![]() ![]() | ContractType | Gets the contract type that is exported by the member that this attribute is attached to. |
![]() | TypeId | When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.) |
| Name | Description | |
|---|---|---|
![]() ![]() | Equals | Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.) |
![]() ![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() ![]() | GetHashCode | Returns the hash code for this instance. (Inherited from Attribute.) |
![]() ![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | IsDefaultAttribute | When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.) |
![]() | Match | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.) |
![]() ![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() ![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
|---|---|---|
![]() ![]() | _Attribute::GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfo | Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.) |
![]() ![]() | _Attribute::Invoke | Provides access to properties and methods exposed by an object. (Inherited from Attribute.) |
In the Attributed Programming Model, the ExportAttribute declares that a part exports, or provides to the composition container, an object that fulfills a particular contract. During composition, parts with imports that have matching contracts will have those dependencies filled by the exported object.
The ExportAttribute can decorate either an entire class, or a property, field, or method of a class. If the entire class is decorated, an instance of the class is the exported object. If a member of a class is decorated, the exported object will be the value of the decorated member.
Whether or not a contract matches is determined primarily by the contract name and the contract type. For more information, see ImportAttribute.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

