ArcGIS Pro 2.7 API Reference Guide
GetEsriShapeSize Method (GeometryEngine)
Example 

ArcGIS.Core.Geometry Namespace > GeometryEngine Class : GetEsriShapeSize Method
A combination of EsriShapeExportFlags which determines how the geometry is exported. Uses esriShapeExportNewArcFormat for for circular and elliptic arcs.
The geometry to export.
Returns the size of the buffer in bytes that will be required to hold the Esri shapefile version of the input geometry.
Syntax
public int GetEsriShapeSize( 
   EsriShapeExportFlags exportFlags,
   Geometry geometry
)
Public Function GetEsriShapeSize( _
   ByVal exportFlags As EsriShapeExportFlags, _
   ByVal geometry As Geometry _
) As Integer

Parameters

exportFlags
A combination of EsriShapeExportFlags which determines how the geometry is exported. Uses esriShapeExportNewArcFormat for for circular and elliptic arcs.
geometry
The geometry to export.

Return Value

The size of the buffer.
Exceptions
ExceptionDescription
Geometry is null or empty.
The method is not implemented for GeometryBag.
Example
// create an envelope
List<MapPoint> coordsZM = new List<MapPoint>
{
  MapPointBuilder.CreateMapPoint(1001, 1002, 1003, 1004),
  MapPointBuilder.CreateMapPoint(2001, 2002, Double.NaN, 2004),
  MapPointBuilder.CreateMapPoint(3001, -3002, 3003, 3004),
  MapPointBuilder.CreateMapPoint(1001, -4002, 4003, 4004)
};

Envelope envelope = EnvelopeBuilder.CreateEnvelope(coordsZM[0], coordsZM[2], SpatialReferences.WGS84);

// export and import
EsriShapeExportFlags exportFlags = EsriShapeExportFlags.esriShapeExportDefaults;
EsriShapeImportFlags importFlags = EsriShapeImportFlags.esriShapeImportDefaults;
byte[] buffer = GeometryEngine.Instance.ExportToEsriShape(exportFlags, envelope);
Polygon importedPolygon = GeometryEngine.Instance.ImportFromEsriShape(importFlags, buffer, envelope.SpatialReference) as Polygon;
Envelope importedEnvelope = importedPolygon.Extent;

// export without z,m
buffer = GeometryEngine.Instance.ExportToEsriShape(EsriShapeExportFlags.esriShapeExportStripZs | EsriShapeExportFlags.esriShapeExportStripMs, envelope);
importedPolygon = GeometryEngine.Instance.ImportFromEsriShape(importFlags, buffer, SpatialReferences.WGS84) as Polygon;
importedEnvelope = importedPolygon.Extent;

bool hasZ = importedEnvelope.HasZ;      // hasZ = false
bool hasM = importedEnvelope.HasM;      // hasM = false

// export with shapeSize
int bufferSize = GeometryEngine.Instance.GetEsriShapeSize(exportFlags, envelope);
buffer = new byte[bufferSize];

bufferSize = GeometryEngine.Instance.ExportToEsriShape(exportFlags, envelope, ref buffer);
importedPolygon = GeometryEngine.Instance.ImportFromEsriShape(importFlags, buffer, envelope.SpatialReference) as Polygon;
importedEnvelope = importedPolygon.Extent;


// or use the envelope and envelopeBuilder classes
buffer = envelope.ToEsriShape();
// buffer represents a polygon as there is not an envelope Esri shape buffer
// EnvelopeBuilder.FromEsriShape takes a polygon Esri shape buffer and returns the extent of the polygon.
importedEnvelope = EnvelopeBuilder.FromEsriShape(buffer);
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

GeometryEngine Class
GeometryEngine Members