ElementSet Class

A set that contains element objects.

Inheritance Hierarchy

System.Object
Autodesk.Revit.DB.APIObject
Autodesk.Revit.DB.ElementSet

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)

Syntax

C#

public class ElementSet : APIObject, IEnumerable

The ElementSet type exposes the following members.

Constructors

	Name	Description
	ElementSet	Initializes a new instance of the ElementSet class

Properties

	Name	Description
	IsEmpty	Test to see if the set is empty.
	IsReadOnly	Identifies if the object is read-only or modifiable. (Inherited from APIObject)
	Size	Returns the number of elements that are in the set.

Methods

	Name	Description
	Clear	Removes every item element the set, rendering it empty.
	Contains	Tests for the existence of an element within the set.
	Dispose	Causes the object to release immediately any resources it may be utilizing. (Inherited from APIObject)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object)
	Erase	Removes a specified element from the set.
	ForwardIterator	Retrieve a forward moving iterator to the set.
	GetEnumerator	Retrieve a forward moving iterator to the set.
	GetHashCode	Serves as the default hash function. (Inherited from Object)
	GetType	Gets the Type of the current instance. (Inherited from Object)
	Insert	Insert the specified element into the set.
	ReverseIterator	Retrieve a backward moving iterator to the set.
	ToString	Returns a string that represents the current object. (Inherited from Object)

Example

C#

ICollection<ElementId> selectedIds = uidoc.Selection.GetElementIds();

string info = "Selected elements:\n";
foreach (ElementId id in selectedIds)
{
    Element elem = document.GetElement(id);
    info += elem.Name + "\n";
}

TaskDialog.Show("Revit",info);

VB

Dim selectedIds As ICollection(Of ElementId) = uidoc.Selection.GetElementIds()

Dim info As String = "Selected elements:" & vbLf
For Each id As ElementId In selectedIds
    Dim elem As Element = document.GetElement(id)
    info += elem.Name + vbLf
Next

TaskDialog.Show("Revit", info)