ArcGIS Pro 2.7 API Reference Guide
LookupSymbol Method

ArcGIS.Desktop.Mapping Namespace > FeatureLayer Class : LookupSymbol Method
Object id of the feature to lookup
The viewer whose scale or camera will be used
Looks up the symbol for the corresponding feature identified by the object id. This method will return null when the input OID is not part of the feature layer definition or if the renderer returns a null symbol. This method must be called on the MCT. Use QueuedTask.Run
Syntax
public CIMSymbol LookupSymbol( 
   long oid,
   MapView view
)
Public Function LookupSymbol( _
   ByVal oid As Long, _
   ByVal view As MapView _
) As CIMSymbol

Parameters

oid
Object id of the feature to lookup
view
The viewer whose scale or camera will be used

Return Value

Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
MapView is null
Unsupported renderer type
Remarks
The looked up symbol takes into consideration the current view extent (2D) or camera distance from the ground (3D) and reference scale. Visual variables present on the renderer for color, size*, transparency, and rotation are applied.
Not all renderers support symbol lookup. Check CanLookupSymbol to determine if the given feature layer renderer can support symbol lookup. Calling LookupSymbol on a layer with an unsupported renderer will throw a System.InvalidOperationException
*Size visual variable with 3D views is currently assumed to be proportional on all symbol axis.
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

FeatureLayer Class
FeatureLayer Members