InsertGeometries Method

In This Topic

Inserts the given list of geometries before the specified index.

Syntax

C#
Visual Basic (Declaration)

public void InsertGeometries( 
   int index,
   IEnumerable<Geometry> geometries
)

Public Sub InsertGeometries( _
   ByVal index As Integer, _
   ByVal geometries As IEnumerable(Of Geometry) _
)

Parameters

index: 0 based index. Specify 0 to insert at the beginning. Specify GeometryCount or -1 to insert at the end.
geometries: The geometry to insert.

Exceptions

Exception	Description
System.ArgumentNullException	geometries is null.
System.ArgumentNullException	A geometry in geometries is null. You cannot insert a null geometry into GeometryBag.
System.ArgumentException	A geometry in geometries is GeometryBag. You cannot insert a GeometryBag into another GeometryBag.
System.ArgumentOutOfRangeException	Index must be equal to -1 or less than or equal to the number of geometries in the builder.

Remarks

Specifying -1 for the index is equivalent to AddGeometries.

An Envelope is converted to a Polygon when it is inserted into a GeometryBag. As a result, when retrieving an Envelope from a GeometryBag, it will be a Polygon.

Example

Construct GeometryBag - adding or inserting an enumeration of geometries

MapPoint point = MapPointBuilderEx.CreateMapPoint(10, 20);
List<Coordinate2D> coords = new List<Coordinate2D>() { new Coordinate2D(50, 60), new Coordinate2D(-120, -70), new Coordinate2D(40, 60) };
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(coords, SpatialReferences.WebMercator);
Polyline polyline = PolylineBuilderEx.CreatePolyline(coords);

string json = "{\"rings\":[[[0,0],[0,1],[1,1],[1,0],[0,0]],[[3,0],[3,1],[4,1],[4,0],[3,0]]]}";
Polygon polygon = PolygonBuilderEx.FromJson(json);

var geometries = new List<Geometry>() { point, multipoint, polyline, polygon };

//At 2.x - using (var builder = new GeometryBagBuilder(SpatialReferences.WGS84))
var builder = new GeometryBagBuilderEx(SpatialReferences.WGS84);
builder.AddGeometries(geometries);

GeometryBag geomBag = builder.ToGeometry();
// geomBag.PartCount == 4    (point, multipoint, polyline, polygon)

geometries = new List<Geometry>() { point, polyline };
builder.InsertGeometries(1, geometries);
// builder.GeometryCount == 6
geomBag = builder.ToGeometry();
// geomBag.PartCount == 6    (point, point, polyline, multipoint, polyline, polygon)

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

GeometryBagBuilderEx Class
GeometryBagBuilderEx Members

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