ArcGIS Pro 2.6 API Reference Guide
SelectedIndex Property (ComboBox)

ArcGIS.Desktop.Framework.Contracts Namespace > ComboBox Class : SelectedIndex Property
Gets or sets the zero-based index of the selected item.
Syntax
public int SelectedIndex {get; set;}
Public Property SelectedIndex As Integer
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

ComboBox Class
ComboBox Members