RemovePart Method—ArcGIS Pro

Remove the part specified by . This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public virtual void RemovePart( 
   int partIndex
)

Public Overridable Sub RemovePart( _
   ByVal partIndex As Integer _
)

Parameters

partIndex: 0 based index. Specify 0 to remove the first part. Specify (CountParts - 1) or -1 to remove the last part.

Exceptions

Exception	Description
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run.

Example

List<MapPoint> firstPoints = new List<MapPoint>();
firstPoints.Add(MapPointBuilder.CreateMapPoint(1.0, 1.0));
firstPoints.Add(MapPointBuilder.CreateMapPoint(1.0, 2.0));
firstPoints.Add(MapPointBuilder.CreateMapPoint(2.0, 2.0));
firstPoints.Add(MapPointBuilder.CreateMapPoint(2.0, 1.0));

List<MapPoint> nextPoints = new List<MapPoint>();
nextPoints.Add(MapPointBuilder.CreateMapPoint(11.0, 1.0));
nextPoints.Add(MapPointBuilder.CreateMapPoint(11.0, 2.0));
nextPoints.Add(MapPointBuilder.CreateMapPoint(12.0, 2.0));
nextPoints.Add(MapPointBuilder.CreateMapPoint(12.0, 1.0));

// Builder constructors need to run on the MCT.
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
  using (PolylineBuilder pBuilder = new PolylineBuilder(firstPoints))
  {
    pBuilder.AddPart(nextPoints);

    Polyline polyline = pBuilder.ToGeometry();
    // polyline has 2 parts

    pBuilder.RemovePart(0);
    polyline = pBuilder.ToGeometry();
    // polyline has 1 part
  }
});


// or use a builderEx constructor - doesn't need to run on MCT
PolylineBuilderEx pbuilderEx = new PolylineBuilderEx(firstPoints);
pbuilderEx.AddPart(nextPoints);
Polyline polyline2 = pbuilderEx.ToGeometry() as Polyline;
// polyline2 has 2 parts

pbuilderEx.RemovePart(0);
polyline2 = pbuilderEx.ToGeometry() as Polyline;
// polyline2 has 1 part

Requirements

Target Platforms: Windows 10, Windows 8.1

Reference

MultipartBuilder<T> Class
MultipartBuilder<T> Members