ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Framework.Contracts Namespace / ComboBox Class / SelectedIndex Property

SelectedIndex Property (ComboBox)
Gets or sets the zero-based index of the selected item.
Syntax
public int SelectedIndex {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also