AddPart(IEnumerable<Coordinate2D>) Method

In This Topic

Adds a part constructed by creating line segments from the enumeration of coordinates. The part will be added to the end of the Parts list.

Syntax

C#
Visual Basic (Declaration)

public void AddPart( 
   IEnumerable<Coordinate2D> coordinates
)

Public Overloads Sub AddPart( _
   ByVal coordinates As IEnumerable(Of Coordinate2D) _
)

Parameters

coordinates: An enumeration of coordinates.

Exceptions

Exception	Description
System.ArgumentNullException	coordinates is null.

Example

Build a donut polygon

List<Coordinate2D> outerCoordinates = new List<Coordinate2D>();
outerCoordinates.Add(new Coordinate2D(10.0, 10.0));
outerCoordinates.Add(new Coordinate2D(10.0, 20.0));
outerCoordinates.Add(new Coordinate2D(20.0, 20.0));
outerCoordinates.Add(new Coordinate2D(20.0, 10.0));

// define the inner polygon as anti-clockwise
List<Coordinate2D> innerCoordinates = new List<Coordinate2D>();
innerCoordinates.Add(new Coordinate2D(13.0, 13.0));
innerCoordinates.Add(new Coordinate2D(17.0, 13.0));
innerCoordinates.Add(new Coordinate2D(17.0, 17.0));
innerCoordinates.Add(new Coordinate2D(13.0, 17.0));

PolygonBuilderEx pbEx = new PolygonBuilderEx(outerCoordinates);
Polygon donutEx = pbEx.ToGeometry() as Polygon;
double areaEx = donutEx.Area;       // area = 100

pbEx.AddPart(innerCoordinates);
donutEx = pbEx.ToGeometry() as Polygon;

areaEx = donutEx.Area;    // area = 84.0

areaEx = GeometryEngine.Instance.Area(donutEx);    // area = 84.0

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.

Reference

MultipartBuilderEx Class
MultipartBuilderEx Members
Overload List

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