Entity Class

An object stored in the Extensible Storage framework. An Entity is described by a Schema, which serves both to identify an Entity, and to describe its contents (Fields).

Inheritance Hierarchy

System Object
Autodesk.Revit.DB.ExtensibleStorage Entity

Namespace: Autodesk.Revit.DB.ExtensibleStorage
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)

Syntax

C++

public class Entity : IDisposable

Public Class Entity
	Implements IDisposable

public ref class Entity : IDisposable

type Entity = 
    class
        interface IDisposable
    end

The Entity type exposes the following members.

Constructors

	Name	Description
	Entity	The default-constructed Entity is invalid.
	Entity(Entity)	Constructs a new copy of the input ESEntity object.
	Entity(Guid)	Creates a new Entity corresponding to the Schema of the specified GUID.
	Entity(Schema)	Creates a new Entity corresponding to the Schema.

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Properties

	Name	Description
	IsValidObject	Specifies whether the .NET object represents a valid Revit entity.
	Schema	The Schema describing this Entity.
	SchemaGUID	The GUID of the Schema describing this Entity.

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Methods

	Name	Description
	Clear(Field)	Resets the field to its default value.
	Clear(String)	Resets the field to its default value.
	Dispose	Releases all resources used by the Entity
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object )
	Get FieldType (Field)	Retrieves the value of the field in the entity.
	Get FieldType (String)	Retrieves the value of the field in the entity.
	Get FieldType (Field, ForgeTypeId)	Retrieves the value of the field in the entity.
	Get FieldType (String, ForgeTypeId)	Retrieves the value of the field in the entity.
	GetHashCode	Serves as the default hash function. (Inherited from Object )
	GetType	Gets the Type of the current instance. (Inherited from Object )
	IsValid	Checks whether this Entity has a live Schema corresponding to it.
	ReadAccessGranted	Checks whether this Entity may be retrieved by the current add-in.
	RecognizedField	Checks whether a Field belongs to the same Schema as this Entity.
	Set FieldType (Field, FieldType)	Stores the value of the field in the entity.
	Set FieldType (String, FieldType)	Stores the value of the field in the entity.
	Set FieldType (Field, FieldType, ForgeTypeId)	Stores the value of the field in the entity.
	Set FieldType (String, FieldType, ForgeTypeId)	Stores the value of the field in the entity.
	ToString	Returns a string that represents the current object. (Inherited from Object )
	WriteAccessGranted	Checks whether this Entity may be stored by the current add-in.

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Remarks

An Entity is similar to an object in most object-oriented languages, while a Schema is the class of that object. The Get and Set methods are central - they provide access to the fields of the Entity. Note that an unitialized Entity retrieved from an Element or another Entity (if it has not been created yet) will be represented as an invalid entity, not . If an Element containing an Entity is split (e.g., a wall split), the Entity and its data will exist in both new Elements. If an Element containing an Entity is copied, the Element copy will also contain a copy of the Entity and its data. If an Entity stores an ElementId, and the Element with that ElementId is deleted, the stored ElementId will automatically be set to ElementId.InvalidElementId (-1).

Reference

Autodesk.Revit.DB.ExtensibleStorage Namespace