FilteredElementCollector.GetElementIterator Method

Returns an element iterator to the elements passing the filters.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0)

Syntax

C#

public FilteredElementIterator GetElementIterator()

Return Value

FilteredElementIterator

Exceptions

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

Remarks

Calling this when you have an active iterator to this same collector will result in the first iterator being stopped by this call.

Example

C#

FilteredElementCollector collector = new FilteredElementCollector(document);

// Apply a filter to get all pipes in the document
collector.OfClass(typeof(Autodesk.Revit.DB.Plumbing.Pipe));

// Get results as an element iterator and look for a pipe with
// a specific flow state
FilteredElementIterator elemItr = collector.GetElementIterator();
elemItr.Reset();
while (elemItr.MoveNext())
{
    Pipe pipe = elemItr.Current as Pipe;
    if (pipe.FlowState == PipeFlowState.LaminarState)
    {
        TaskDialog.Show("Revit", "Model has at least one pipe with Laminar flow state.");
        break;
    }
}

VB

Dim collector As New FilteredElementCollector(document)

' Apply a filter to get all pipes in the document
collector.OfClass(GetType(Autodesk.Revit.DB.Plumbing.Pipe))

' Get results as an element iterator and look for a pipe with
' a specific flow state
Dim elemItr As FilteredElementIterator = collector.GetElementIterator()
elemItr.Reset()
While elemItr.MoveNext()
   Dim pipe As Pipe = TryCast(elemItr.Current, Pipe)
   If pipe.FlowState = PipeFlowState.LaminarState Then
      TaskDialog.Show("Revit", "Model has at least one pipe with Laminar flow state.")
      Exit While
   End If
End While