ExtensionElement Class

發行項
07/25/2011

Base class for all domain model element extensions. Allows a DSL Definition to be extended by a third party.

Inheritance Hierarchy

System.Object
Microsoft.VisualStudio.Modeling.ModelElement
Microsoft.VisualStudio.Modeling.ExtensionElement

Namespace: Microsoft.VisualStudio.Modeling
Assembly: Microsoft.VisualStudio.Modeling.Sdk.10.0 (in Microsoft.VisualStudio.Modeling.Sdk.10.0.dll)

Syntax

'宣告
<DomainObjectIdAttribute("37ba5a77-3b1a-47b3-9c04-7573ff9ab0f8")> _
Public MustInherit Class ExtensionElement _
    Inherits ModelElement

[DomainObjectIdAttribute("37ba5a77-3b1a-47b3-9c04-7573ff9ab0f8")]
public abstract class ExtensionElement : ModelElement

[DomainObjectIdAttribute(L"37ba5a77-3b1a-47b3-9c04-7573ff9ab0f8")]
public ref class ExtensionElement abstract : public ModelElement

[<AbstractClass>]
[<DomainObjectIdAttribute("37ba5a77-3b1a-47b3-9c04-7573ff9ab0f8")>]
type ExtensionElement =  
    class
        inherit ModelElement
    end

public abstract class ExtensionElement extends ModelElement

The ExtensionElement type exposes the following members.

Constructors

	Name	Description
	ExtensionElement(Partition, array<PropertyAssignment[])	Constructor
	ExtensionElement(Store, array<PropertyAssignment[])	Constructor

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Properties

	Name	Description
	Extends	The directly-extended domain model element. See also ActualExtendedElement
	Id	Gets the ID of the element. (Inherited from ModelElement.)
	IsActive	Gets the IsActive flag and verifies to see whether the element is active. (Inherited from ModelElement.)
	IsDeleted	Gets the IsDeleted flag and checks to see whether the element has been deleted from the model. (Inherited from ModelElement.)
	IsDeleting	Gets the IsDeleting flag and verifies whether the element is currently being deleted from the model. (Inherited from ModelElement.)
	Partition	Gets or sets the Partition that contains the element. (Inherited from ModelElement.)
	Store	Gets the Store that contains the element. (Inherited from ModelElement.)

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Methods

	Name	Description
	CanMerge	Returns a value indicating whether the source element represented by the specified root ProtoElement can be added to this element. (Overrides ModelElement.CanMerge(ProtoElementBase, ElementGroupPrototype).)
	ChooseMergeTarget(ElementGroup)	Selects a target element to accept as its child an element that the user wants to copy, drag, or create. (Inherited from ModelElement.)
	ChooseMergeTarget(ElementGroupPrototype)	Selects a target element to accept as its child an element that the user wants to copy, drag, or create. (Inherited from ModelElement.)
	Copy()	Creates a copy of the element in the model. (Inherited from ModelElement.)
	Copy(IEnumerable<Guid>)	Creates a copy of the element and its child links and elements. (Inherited from ModelElement.)
	Delete()	Deletes an element from the model. (Inherited from ModelElement.)
	Delete(array<Guid[])	Deletes an element from the model. (Inherited from ModelElement.)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetDomainClass	Gets the most-derived domain class for this element. (Inherited from ModelElement.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetRoleCollection<TCollection, TElement>(Guid)	Gets or creates the linked element collection (Inherited from ModelElement.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MergeConfigure	(Overrides ModelElement.MergeConfigure(ElementGroup).)
	MergeDisconnect	Disconnects a source element from a target element. (Inherited from ModelElement.)
	MergeRelate	Creates a relationship between this target element and the specified source element. (Inherited from ModelElement.)
	OnCopy	Called when this element has been created as a copy of another element. (Inherited from ModelElement.)
	OnDeleted	Called when this element has been deleted from the model. (Inherited from ModelElement.)
	OnDeleting	Called when this element is about to be deleted. (Inherited from ModelElement.)
	OnResurrected	Called when this element has been added back to a model. (Inherited from ModelElement.)
	OnRolePlayerPositionChanged	Called when the position of a role has changed. (Inherited from ModelElement.)
	OnRolePlayerPositionChanging	Called when a role player position is about to change. (Inherited from ModelElement.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Extension Methods

	Name	Description
	AddExtension(Guid)	Overloaded. Extend this ModelElement with newly instantiated extension of the identified domain type. An InvalidOperationException will be thrown if the element already has an extension of that type. (Defined by ModelElementExtensionMethods.)
	AddExtension(Type)	Overloaded. Extend this ModelElement with a newly instantiated extension of the specified type. An InvalidOperationException will be thrown if the element already has an extension of that type. (Defined by ModelElementExtensionMethods.)
	AddExtension(DomainClassInfo)	Overloaded. Extend this ModelElement with a newly instantiated extension of the specified domain type. An InvalidOperationException will be thrown if the element already has an extension of that type. (Defined by ModelElementExtensionMethods.)
	AddExtension(ExtensionElement)	Overloaded. Extend this ModelElement with a specific extension. An InvalidOperationException will be thrown if the element already has an extension of the same type. (Defined by ModelElementExtensionMethods.)
	AddExtension<T>()	Overloaded. Extend this ModelElement with a newly instantiated extension of a particular type. An InvalidOperationException will be thrown if the element already has an extension of the same type. (Defined by ModelElementExtensionMethods.)
	CanDelete	Deletes the element from the model. (Defined by ImmutabilityExtensionMethods.)
	GetAllExtensions	Return an enumerable that performs a breadth first traversal across the tree of extension elements embedded in this ModelElement. (Defined by ModelElementExtensionMethods.)
	GetBaseElement	Returns the root of the virtual MEL in which the specified ModelElement is participating. (Defined by ModelElementExtensionMethods.)
	GetExtension(Guid)	Overloaded. (Defined by ModelElementExtensionMethods.)
	GetExtension(Type)	Overloaded. Get the ExtensionElement of the specified type from the available extensions of this ModelElement. If the element has no such extension then an InvalidOperationException will be raised. (Defined by ModelElementExtensionMethods.)
	GetExtension(DomainClassInfo)	Overloaded. (Defined by ModelElementExtensionMethods.)
	GetExtension<T>()	Overloaded. Get the ExtensionElement of the specified type from the available extensions of this ModelElement. If the element has no such extension then an InvalidOperationException will be raised. (Defined by ModelElementExtensionMethods.)
	GetLocks	Get the lock flags for this element. This will include any locks enabled on the Partition containing the element. (Defined by ImmutabilityExtensionMethods.)
	IsExtendedBy(Guid)	Overloaded. Query whether this ModelElement is currently extended by an ExtensionElement of a particular type. (Defined by ModelElementExtensionMethods.)
	IsExtendedBy(Type)	Overloaded. Query whether this ModelElement is currently extended by an ExtensionElement of a particular type. (Defined by ModelElementExtensionMethods.)
	IsExtendedBy(DomainClassInfo)	Overloaded. Query whether this ModelElement is currently extended by an ExtensionElement of a particular type. (Defined by ModelElementExtensionMethods.)
	IsLocked	Test whether this element has any of a specified set of locks (Defined by ImmutabilityExtensionMethods.)
	RemoveExtension(Type)	Overloaded. Remove any extension of this ModelElement that is of a particular type. (Defined by ModelElementExtensionMethods.)
	RemoveExtension(Guid)	Overloaded. Remove any extension of the specified ModelElement that is of a particular type. (Defined by ModelElementExtensionMethods.)
	RemoveExtension(DomainClassInfo)	Overloaded. Remove any extension of the specified ModelElement that is of a particular type. (Defined by ModelElementExtensionMethods.)
	RemoveExtension(ExtensionElement)	Overloaded. Remove a specified ExtensionElement from the extensions of this ModelElement. (Defined by ModelElementExtensionMethods.)
	SetLocks	Set the lock flags of this element (Defined by ImmutabilityExtensionMethods.)
	TryGetExtension(Guid)	Overloaded. (Defined by ModelElementExtensionMethods.)
	TryGetExtension(Type)	Overloaded. (Defined by ModelElementExtensionMethods.)
	TryGetExtension(DomainClassInfo)	Overloaded. (Defined by ModelElementExtensionMethods.)
	TryGetExtension<T>()	Overloaded. Get the ExtensionElement of the specified type from the available extensions of this ModelElement. If this element has no such extension then the result will be null. (Defined by ModelElementExtensionMethods.)

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Fields

	Name	Description
	DomainClassId	ExtensionElement domain class Id.

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Explicit Interface Implementations

	Name	Description
	IMergeElements.CanMerge	Returns true if this element can merge with the content of the prototype. (Inherited from ModelElement.)
	IMergeElements.ChooseMergeTarget(ElementGroup)	(Inherited from ModelElement.)
	IMergeElements.ChooseMergeTarget(ElementGroupPrototype)	(Inherited from ModelElement.)
	IMergeElements.MergeConfigure	(Inherited from ModelElement.)
	IMergeElements.MergeDisconnect	(Inherited from ModelElement.)
	IMergeElements.MergeRelate	(Inherited from ModelElement.)

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Remarks

For more information, see Adding Extensions to DSL Definitions.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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