2025 Method
Changes 0
M

Element.ChangeTypeId

Description:
Changes the type of all elements in the given set.
Remarks:
In some cases, applying a change in type will result in a new element being created. The only active examples of this are when applying a normal wall type to a curtain panel, or converting such a wall back to a curtain panel. Then return map would have (original element id, new element id) pair(s). Note: this function needs an open transaction. Note: this function calls regeneration.
Overloads (2):
ChangeTypeId(Document,ICollection[ElementId],ElementId)
public static IDictionary<ElementId, ElementId> ChangeTypeId(
	Document document,
	ICollection<ElementId> elementIds,
	ElementId typeId
)
Return Value IDictionary<ElementId,ElementId> The map of original element IDs to the new element IDs if some elements were replaced by new elements (the map is empty if no elements were replaced)
  • At least one of the elements in elementIds does not exist in the document -or- Not all elements elementIds can have a type assigned. -or- The type typeId is not valid for at least one of the elements in elementIds.
  • A non-optional argument was null
  • One or more elements in elementIds is a member of a loaded family. -or- One or more elements in elementIds is a member of a group type that is not being edited.