ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / TOCDragData Interface / SourceMapURI Property

SourceMapURI Property
Gets the source URI of the map whose TOC is the drag source.
Syntax
string SourceMapURI {get;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.5 or higher.
See Also