External File Utils Is External File Reference Method

Determines whether the given element represents an external file.

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

Syntax

public static bool IsExternalFileReference(
	Document aDoc,
	ElementId elemId
)

Public Shared Function IsExternalFileReference ( 
	aDoc As Document,
	elemId As ElementId
) As Boolean

public:
static bool IsExternalFileReference(
	Document^ aDoc, 
	ElementId^ elemId
)

static member IsExternalFileReference : 
        aDoc : Document * 
        elemId : ElementId -> bool

Boolean
True if the given element represents an external file; false otherwise.

Exceptions

Exception	Condition
ArgumentException	The element elemId does not exist in the document
ArgumentNullException	A non-optional argument was null

Remarks

CAD imports are not external file references, as their data is brought fully into Revit. No connection is maintained to the original file.

A link may be an external resource without being an external file.