ArcGIS Pro 3.1 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMSymbolLayer Class
Members Example

In This Topic
    CIMSymbolLayer Class
    In This Topic
    Represents a symbol layer. Symbol layers are the components that make up a symbol. A symbol layer is represented by a stroke, fill, marker, or procedural symbol layer.
    Syntax
    Example
    How to construct a multilayer line symbol with circle markers on the line ends
    //These methods must be called within the lambda passed to QueuedTask.Run
    var lineStrokeRed = SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.RedRGB, 4.0);
    var markerCircle = SymbolFactory.Instance.ConstructMarker(ColorFactory.Instance.RedRGB, 12, SimpleMarkerStyle.Circle);
    markerCircle.MarkerPlacement = new CIMMarkerPlacementOnVertices()
    {
      AngleToLine = true,
      PlaceOnEndPoints = true,
      Offset = 0
    };
    var lineSymbolWithCircles = new CIMLineSymbol()
    {
      SymbolLayers = new CIMSymbolLayer[2] { markerCircle, lineStrokeRed }
    };
    
    How to construct a multilayer line symbol with an arrow head on the end
    //These methods must be called within the lambda passed to QueuedTask.Run
    var markerTriangle = SymbolFactory.Instance.ConstructMarker(ColorFactory.Instance.RedRGB, 12, SimpleMarkerStyle.Triangle);
    markerTriangle.Rotation = -90; // or -90
    markerTriangle.MarkerPlacement = new CIMMarkerPlacementOnLine() { AngleToLine = true, RelativeTo = PlacementOnLineRelativeTo.LineEnd };
    
    var lineSymbolWithArrow = new CIMLineSymbol()
    {
      SymbolLayers = new CIMSymbolLayer[2] { markerTriangle,
                  SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.RedRGB, 2)
              }
    };
    
    Snippet Mesh procedural texture symbol
    /// <summary>
    /// Creates Mesh procedural symbol with various textures.
    /// ![MeshProceduralTexture](http://Esri.github.io/arcgis-pro-sdk/images/Symbology/mesh-procedural-texture.png)
    /// </summary>
    /// <remarks>Note: The rule package used in this method can be obtained from the Sample Data included in the arcgis-pro-sdk-community-samples repository.</remarks>
    /// <returns></returns>
    private static readonly string _rulePkgPath = @"C:\Data\RulePackages\MultipatchTextures.rpk";
    public static Task<CIMMeshSymbol> CreateProceduralMeshSymbolAsync()
    {
        return QueuedTask.Run<CIMMeshSymbol>(() =>
        {                  
            CIMSymbolLayer[] proceduralSymbolLyr =
            {
                new CIMProceduralSymbolLayer()
                {
                    PrimitiveName = "Textures",
                    RulePackage = _rulePkgPath,
                    RulePackageName = "Textures",
                }
            };
            var myMeshSymbol = new CIMMeshSymbol()
            {
                SymbolLayers = proceduralSymbolLyr
            };
    
            return myMeshSymbol;
        });
    }
    Snippet Cross hatch
    /// <summary>
    /// Create a polygon symbol using the ConstructHatchFill method . <br/>
    /// ![PolygonSymbolDiagonalCrossHatch](http://Esri.github.io/arcgis-pro-sdk/images/Symbology/ConstructHatchFill.png)
    /// </summary>
    /// <returns></returns>
    private static Task<CIMPolygonSymbol> CreateHatchFillPolygonAsync()
    {
        return QueuedTask.Run<CIMPolygonSymbol>(() =>
        {
            CIMStroke lineStroke = SymbolFactory.Instance.ConstructStroke(CIMColor.CreateRGBColor(51, 51, 51, 60), 4, SimpleLineStyle.Solid);
            //gradient
            var hatchFill = SymbolFactory.Instance.ConstructHatchFill(lineStroke, 45, 6, 0);
    
            List<CIMSymbolLayer> symbolLayers = new List<CIMSymbolLayer>
          {
      hatchFill
          };
            return new CIMPolygonSymbol() { SymbolLayers = symbolLayers.ToArray() };
        });
    }
    Snippet Gradient color fill using CIMGradientFill
    /// <summary>
    /// Create a polygon symbol with a gradient color fill. <br/>
    /// ![PolygonSymbolGradientColor](http://Esri.github.io/arcgis-pro-sdk/images/Symbology/polygon-gradient-color.png)
    /// </summary>
    /// <remarks>
    /// 1. Create a solid colored stroke with 50% transparency
    /// 1. Create a fill using gradient colors red through green
    /// 1. Apply both the stroke and fill as a symbol layer array to the new PolygonSymbol
    /// </remarks>
    /// <returns></returns>
    public static Task<CIMPolygonSymbol> CreateGradientFillAsync()
    {
        return QueuedTask.Run<CIMPolygonSymbol>(() =>
        {
            var trans = 50.0;//semi transparent
            CIMStroke outline = SymbolFactory.Instance.ConstructStroke(CIMColor.CreateRGBColor(0, 0, 0, trans), 2.0, SimpleLineStyle.Solid);
            //Mimic cross hatch
            CIMFill solidColorHatch =
             new CIMGradientFill()
             {
                 ColorRamp = ColorFactory.Instance.ConstructColorRamp(ColorRampAlgorithm.LinearContinuous,
                                    ColorFactory.Instance.RedRGB, ColorFactory.Instance.GreenRGB)
             };
            List<CIMSymbolLayer> symbolLayers = new List<CIMSymbolLayer>
            {
                outline,
                solidColorHatch
            };
    
            return new CIMPolygonSymbol() { SymbolLayers = symbolLayers.ToArray() };
        });
    }
    Inheritance Hierarchy

    System.Object
       ArcGIS.Core.CIM.CIMObject
          ArcGIS.Core.CIM.CIMSymbolLayer
             ArcGIS.Core.CIM.CIMFill
             ArcGIS.Core.CIM.CIMMarker
             ArcGIS.Core.CIM.CIMMaterialSymbolLayer
             ArcGIS.Core.CIM.CIMMeshEdge
             ArcGIS.Core.CIM.CIMProceduralSymbolLayer
             ArcGIS.Core.CIM.CIMStroke

    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3.0 or higher.
    See Also