FilteredElementCollectorFirstElementId Method

Returns the id of the first element to pass the filter(s).

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.0.4.0 (26.0.4.0)

Syntax

public ElementId FirstElementId()

Public Function FirstElementId As ElementId

public:
ElementId^ FirstElementId()

member FirstElementId : unit -> ElementId

Return Value

ElementId
The first element id.

Exceptions

Exception	Condition
InvalidOperationException	The collector does not have a filter applied. Extraction or iteration of elements is not permitted without a filter.

Remarks

This will reset the collector to the beginning and find the first element that passes the applied filter(s). If you have an active iterator to this same collector it will be stopped by this call.

Reference

FilteredElementCollector Class

Autodesk.Revit.DB Namespace