ArcGIS Pro 3.2 API Reference Guide
ArcGIS.Core.Geometry Namespace / PolygonBuilderEx Class / CreatePolygon Method / CreatePolygon(Multipoint,SpatialReference) Method
The multipoint to create the polygon. Line segments are created from the points in the multipoint.
(Optional) The SpatialReference. The default value is null. If spatialReference is null, then the spatial reference will be inherited from multipoint.
Example

In This Topic
    CreatePolygon(Multipoint,SpatialReference) Method
    In This Topic
    Convenience method to create a new instance of the Polygon class.
    Syntax
    Public Overloads Shared Function CreatePolygon( _
       ByVal multipoint As Multipoint, _
       Optional ByVal spatialReference As SpatialReference _
    ) As Polygon

    Parameters

    multipoint
    The multipoint to create the polygon. Line segments are created from the points in the multipoint.
    spatialReference
    (Optional) The SpatialReference. The default value is null. If spatialReference is null, then the spatial reference will be inherited from multipoint.

    Return Value

    Exceptions
    ExceptionDescription
    multipoint is null.
    Remarks
    HasZ, HasM and HasID attributes are inherited from the input multipoint.
    Example
    Create_polygon_poly
    //Create a polygon graphic with simple line and fill styles.
    
    //Construct on the worker thread
    await QueuedTask.Run(() =>
    {
      //Build geometry
      List<Coordinate2D> plyCoords = new List<Coordinate2D>();
      plyCoords.Add(new Coordinate2D(1, 7));
      plyCoords.Add(new Coordinate2D(2, 7));
      plyCoords.Add(new Coordinate2D(2, 6.7));
      plyCoords.Add(new Coordinate2D(3, 6.7));
      plyCoords.Add(new Coordinate2D(3, 6.1));
      plyCoords.Add(new Coordinate2D(1, 6.1));
      //At 2.x - Polygon poly = PolygonBuilder.CreatePolygon(plyCoords);
      Polygon poly = PolygonBuilderEx.CreatePolygon(plyCoords);
    
      //Set symbolology, create and add element to layout
      CIMStroke outline = SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.BlueRGB, 2.0, SimpleLineStyle.DashDotDot);
      CIMPolygonSymbol polySym = SymbolFactory.Instance.ConstructPolygonSymbol(ColorFactory.Instance.RedRGB, SimpleFillStyle.ForwardDiagonal, outline);
      //At 2.x - GraphicElement polyElm = LayoutElementFactory.Instance.CreatePolygonGraphicElement(layout, poly, polySym);
      //         polyElm.SetName("New Polygon"); 
      GraphicElement polyElm = ElementFactory.Instance.CreateGraphicElement(layout, poly, polySym, "New Polygon");
    });
    Create_lasso
    //Create a graphic lasso element with simple line and fill styles.
    
    //Construct on the worker thread
    await QueuedTask.Run(() =>
    {
      //Build geometry
      List<Coordinate2D> plyCoords = new List<Coordinate2D>();
      plyCoords.Add(new Coordinate2D(1, 1));
      plyCoords.Add(new Coordinate2D(1.25, 2));
      plyCoords.Add(new Coordinate2D(1.5, 1.1));
      plyCoords.Add(new Coordinate2D(1.75, 2));
      plyCoords.Add(new Coordinate2D(2, 1.1));
      plyCoords.Add(new Coordinate2D(2.25, 2));
      plyCoords.Add(new Coordinate2D(2.5, 1.1));
      plyCoords.Add(new Coordinate2D(2.75, 2));
      plyCoords.Add(new Coordinate2D(3, 1));
      //At 2.x - Polygon poly = PolygonBuilder.CreatePolygon(plyCoords);
      Polygon poly = PolygonBuilderEx.CreatePolygon(plyCoords);
    
      //Set symbolology, create and add element to layout
      CIMStroke outline = SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.BlackRGB, 2.0, SimpleLineStyle.Solid);
      CIMPolygonSymbol polySym = SymbolFactory.Instance.ConstructPolygonSymbol(ColorFactory.Instance.RedRGB, SimpleFillStyle.ForwardDiagonal, outline);
      //At 2.x - GraphicElement polyElm = LayoutElementFactory.Instance.CreatePolygonGraphicElement(layout, poly, polySym);
      //         polyElm.SetName("New Lasso"); 
      GraphicElement polyElm = ElementFactory.Instance.CreateGraphicElement(layout, poly, polySym, "New Lasso");
    });
    Create Lasso Polygon, Freehand Element
    //Must be on QueuedTask.Run(() => { ...
    
    List<Coordinate2D> plyCoords = new List<Coordinate2D>();
    plyCoords.Add(new Coordinate2D(1, 1));
    plyCoords.Add(new Coordinate2D(1.25, 2));
    plyCoords.Add(new Coordinate2D(1.5, 1.1));
    plyCoords.Add(new Coordinate2D(1.75, 2));
    plyCoords.Add(new Coordinate2D(2, 1.1));
    plyCoords.Add(new Coordinate2D(2.25, 2));
    plyCoords.Add(new Coordinate2D(2.5, 1.1));
    plyCoords.Add(new Coordinate2D(2.75, 2));
    plyCoords.Add(new Coordinate2D(3, 1));
    Polygon poly = PolygonBuilderEx.CreatePolygon(plyCoords);
    
    //Set symbolology, create and add element to layout
    CIMStroke outline = SymbolFactory.Instance.ConstructStroke(
                ColorFactory.Instance.BlackRGB, 2.0, SimpleLineStyle.Solid);
    CIMPolygonSymbol polySym = SymbolFactory.Instance.ConstructPolygonSymbol(
             ColorFactory.Instance.RedRGB, SimpleFillStyle.ForwardDiagonal, outline);
    
    ElementFactory.Instance.CreateGraphicElement(
      container, poly, polySym, "New Lasso");
    Create Polygon Element
    //Must be on QueuedTask.Run(() => { ...
    
    //Build geometry
    List<Coordinate2D> plyCoords = new List<Coordinate2D>();
    plyCoords.Add(new Coordinate2D(1, 7));
    plyCoords.Add(new Coordinate2D(2, 7));
    plyCoords.Add(new Coordinate2D(2, 6.7));
    plyCoords.Add(new Coordinate2D(3, 6.7));
    plyCoords.Add(new Coordinate2D(3, 6.1));
    plyCoords.Add(new Coordinate2D(1, 6.1));
    Polygon poly = PolygonBuilderEx.CreatePolygon(plyCoords);
    
    //Set symbolology, create and add element to layout
    CIMStroke outline = SymbolFactory.Instance.ConstructStroke(
      ColorFactory.Instance.BlueRGB, 2.0, SimpleLineStyle.DashDotDot);
    CIMPolygonSymbol polySym = SymbolFactory.Instance.ConstructPolygonSymbol(
      ColorFactory.Instance.RedRGB, SimpleFillStyle.ForwardDiagonal, outline);
    
    ElementFactory.Instance.CreateGraphicElement(
      container, poly, polySym, "New Polygon", false);
    
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also