ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / Layer Class / SetExpanded Method
Expands.
Example Version

SetExpanded Method
Sets whether the layer appears expanded i.e. showing legends on the TOC. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public void SetExpanded( 
   bool isExpanded
)

Parameters

isExpanded
Expands.
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
Example
Manipulate the Voxel Layer TOC Group
//var voxelLayer = ...
//Must be on the QueuedTask.Run()

//Toggle containers and visibility in the TOC
voxelLayer.SetExpanded(!voxelLayer.IsExpanded);
voxelLayer.SetVisibility(!voxelLayer.IsVisible);
voxelLayer.SetIsosurfaceContainerExpanded(!voxelLayer.IsIsosurfaceContainerExpanded);
voxelLayer.SetIsosurfaceContainerVisibility(!voxelLayer.IsIsosurfaceContainerVisible);
voxelLayer.SetSliceContainerExpanded(voxelLayer.IsSliceContainerExpanded);
voxelLayer.SetSliceContainerVisibility(!voxelLayer.IsSliceContainerVisible);
voxelLayer.SetSectionContainerExpanded(!voxelLayer.IsSectionContainerExpanded);
voxelLayer.SetSectionContainerVisibility(!voxelLayer.IsSectionContainerVisible);
voxelLayer.SetLockedSectionContainerExpanded(!voxelLayer.IsLockedSectionContainerExpanded);
voxelLayer.SetLockedSectionContainerVisibility(!voxelLayer.IsLockedSectionContainerVisible);
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also