ArcGIS Pro 3.1 API Reference Guide
ArcGIS.Core.Geometry Namespace / Segment Class / StartPoint Property
Example

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    StartPoint Property (Segment)
    In This Topic
    Gets the start point.
    Syntax
    public MapPoint StartPoint {get;}
    Public ReadOnly Property StartPoint As MapPoint
    Example
    StartPoint of a Polyline
    // Method 1: Get the start point of the polyline by converting the polyline 
    //    into a collection of points and getting the first point
    
    // sketchGeometry is a Polyline
    // get the sketch as a point collection
    var pointCol = ((Multipart)sketchGeometry).Points;
    // Get the start point of the line
    var firstPoint = pointCol[0];
    
    // Method 2: Convert polyline into a collection of line segments 
    //   and get the "StartPoint" of the first line segment.
    var polylineGeom = sketchGeometry as ArcGIS.Core.Geometry.Polyline;
    var polyLineParts = polylineGeom.Parts;
    
    ReadOnlySegmentCollection polylineSegments = polyLineParts.First();
    
    //get the first segment as a LineSegment
    var firsLineSegment = polylineSegments.First() as LineSegment;
    
    //Now get the start Point
    var startPoint = firsLineSegment.StartPoint;
    
    Cubic Bezier Properties
    // retrieve the bezier curve's control points
    CubicBezierSegment cb = CubicBezierBuilderEx.CreateCubicBezierSegment(bezierSegment);
    MapPoint startPt = cb.StartPoint;
    Coordinate2D ctrlPt1 = cb.ControlPoint1;
    Coordinate2D ctrlPt2 = cb.ControlPoint2;
    MapPoint endPt = cb.EndPoint;
    
    bool isCurve = cb.IsCurve;
    double len = cb.Length;
    
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3.0 or higher.
    See Also