VisualVariables Property (CIMUniqueValueRenderer)
Get the attribute rotation field of a layer
var featureLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<FeatureLayer>().FirstOrDefault();
QueuedTask.Run(() =>
{
var cimRenderer = featureLayer.GetRenderer() as CIMUniqueValueRenderer;
var cimRotationVariable = cimRenderer.VisualVariables.OfType<CIMRotationVisualVariable>().FirstOrDefault();
var rotationInfoZ = cimRotationVariable.VisualVariableInfoZ;
var rotationExpression = rotationInfoZ.ValueExpressionInfo.Expression; // this expression stores the field name
});
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.