GetMinMaxM Method—ArcGIS Pro

C#
Visual Basic (Declaration)

public void GetMinMaxM( 
   Multipart multipart,
   out double minM,
   out double maxM
)

Public Sub GetMinMaxM( _
   ByVal multipart As Multipart, _
   ByRef minM As Double, _
   ByRef maxM As Double _
)

Parameters

multipart: The multipart from which the M values are extracted.
minM: The minimum M value.
maxM: The maximum M value.

Exception	Description
System.ArgumentNullException	Multipart is null or empty.
System.InvalidOperationException	This geometry is not M-Aware.
System.NotImplementedException	Spatial reference of multipartis an image coordinate system.

C#

string json = "{\"hasM\":true,\"rings\":[[[-3000,-2000,10],[-2000,-2000,15],[-1000,-2000,20],[0,-2000,0],[1000,-2000,-20],[2000,-2000,-30],[3000,-2000,10],[4000,-2000,5]]],\"spatialReference\":{\"wkid\":3857}}";
Polygon polygon = PolygonBuilder.FromJson(json);

double minM, maxM;
GeometryEngine.Instance.GetMinMaxM(polygon, out minM, out maxM);
// minM = -30 
// maxM = 20

json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,null],[-1000,-2000,null]]]}";
Polyline polyline = PolylineBuilder.FromJson(json);

GeometryEngine.Instance.GetMinMaxM(polyline, out minM, out maxM);
// minM = 10
// maxM = 10

json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,null],[-2000,-2000,null],[-1000,-2000,null]]]}";
polyline = PolylineBuilder.FromJson(json);

GeometryEngine.Instance.GetMinMaxM(polyline, out minM, out maxM);
// minM = double.Nan
// maxM = double.Nan

Target Platforms: Windows 10, Windows 8.1

Reference

GeometryEngine Class
GeometryEngine Members