ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMLineSymbol Class
Members Example

In This Topic
    CIMLineSymbol Class
    In This Topic
    Represents a line symbol which is used to draw polyline features or graphics.
    Object Model
    CIMLineSymbol ClassCIMLineSymbol ClassCIMLineSymbol Class
    Syntax
    Example
    Create Lasso Line, Freehand Graphic Element
    //Must be on QueuedTask.Run(() => { ...
    
    //Build geometry
    List<Coordinate2D> plCoords = new List<Coordinate2D>();
    plCoords.Add(new Coordinate2D(1.5, 10.5));
    plCoords.Add(new Coordinate2D(1.25, 9.5));
    plCoords.Add(new Coordinate2D(1, 10.5));
    plCoords.Add(new Coordinate2D(0.75, 9.5));
    plCoords.Add(new Coordinate2D(0.5, 10.5));
    plCoords.Add(new Coordinate2D(0.5, 1));
    plCoords.Add(new Coordinate2D(0.75, 2));
    plCoords.Add(new Coordinate2D(1, 1));
    Polyline linePl = PolylineBuilderEx.CreatePolyline(plCoords);
    
    //Set symbolology, create and add element to layout
    CIMLineSymbol lineSym = SymbolFactory.Instance.ConstructLineSymbol(
              ColorFactory.Instance.BlackRGB, 2.0, SimpleLineStyle.Solid);
    //var graphic = GraphicFactory.Instance.CreateShapeGraphic(linePl, lineSym);
    
    var ge = ElementFactory.Instance.CreateGraphicElement(
                            container, linePl, lineSym, "New Freehand");
    Create line graphic with symbology
    //Create a simple 2D line graphic and apply an existing line
    //style item as the symbology.
    
    //Construct on the worker thread
    await QueuedTask.Run(() =>
    {
      //Build 2d line geometry
      List<Coordinate2D> plCoords = new List<Coordinate2D>();
      plCoords.Add(new Coordinate2D(1, 8.5));
      plCoords.Add(new Coordinate2D(1.66, 9));
      plCoords.Add(new Coordinate2D(2.33, 8.1));
      plCoords.Add(new Coordinate2D(3, 8.5));
      //At 2.x - Polyline linePl = PolylineBuilder.CreatePolyline(plCoords);
      Polyline linePl = PolylineBuilderEx.CreatePolyline(plCoords);
    
      //(optionally) Reference a line symbol in a style
      StyleProjectItem lnStylePrjItm = Project.Current.GetItems<StyleProjectItem>()
                                    .FirstOrDefault(item => item.Name == "ArcGIS 2D");
      SymbolStyleItem lnSymStyleItm = lnStylePrjItm.SearchSymbols(
                                    StyleItemType.LineSymbol, "Line with 2 Markers")[0];
      CIMLineSymbol lineSym = lnSymStyleItm.Symbol as CIMLineSymbol;
      lineSym.SetSize(20);
    
      //Set symbolology, create and add element to layout
    
      //An alternative simple symbol is also commented out below.
      //This would elminate the four optional lines of code above that
      //reference a style.
      //
      //CIMLineSymbol lineSym = SymbolFactory.Instance.ConstructLineSymbol(
      //         ColorFactory.Instance.BlueRGB, 4.0, SimpleLineStyle.Solid);  
      //At 2.x - GraphicElement lineElm =
      //        LayoutElementFactory.Instance.CreateLineGraphicElement(
      //                                            layout, linePl, lineSym);
    
      GraphicElement lineElm = ElementFactory.Instance.CreateGraphicElement(
                                                  container, linePl, lineSym);
      lineElm.SetName("New Line");
    });
    How to construct a line symbol of specific color, size and line style
    CIMLineSymbol lineSymbol = SymbolFactory.Instance.ConstructLineSymbol(ColorFactory.Instance.BlueRGB, 4.0, SimpleLineStyle.Solid);
    
    How to construct a line symbol from a stroke
    CIMStroke stroke = SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.BlackRGB, 2.0);
    CIMLineSymbol lineSymbolFromStroke = SymbolFactory.Instance.ConstructLineSymbol(stroke);
    
    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 Markers placed at a 45 degree angle
    /// <summary>
    /// Create a line symbol with the markers placed at a 45 degree angle. <br/>  
    /// ![LineSymbolAngleMarker](http://Esri.github.io/arcgis-pro-sdk/images/Symbology/line-marker-angle.png)
    /// </summary>
    /// <returns></returns>
    internal static Task<CIMLineSymbol> CreateMyMarkerLineSymbolAsync()
    {
      return QueuedTask.Run<CIMLineSymbol>(() =>
      {
        //Create a marker from the "|" character.  This is the marker that will be used to render the line layer.
        var lineMarker = SymbolFactory.Instance.ConstructMarker(124, "Agency FB", "Regular", 12);
    
        //Default line symbol which will be modified 
        var blackSolidLineSymbol = SymbolFactory.Instance.ConstructLineSymbol(ColorFactory.Instance.BlackRGB, 2, SimpleLineStyle.Solid);
    
        //Modifying the marker to align with line
        //First define "markerplacement"
        CIMMarkerPlacementAlongLineSameSize markerPlacement = new CIMMarkerPlacementAlongLineSameSize()
        {
          AngleToLine = true,
          PlacementTemplate = new double[] { 5 }
        };
        //assign the markerplacement to the marker
        lineMarker.MarkerPlacement = markerPlacement;
        //angle the marker if needed
        lineMarker.Rotation = 45;
    
        //assign the marker as a layer to the line symbol
        blackSolidLineSymbol.SymbolLayers[0] = lineMarker;
    
        return blackSolidLineSymbol;
      });
    }
    Snippet Dash line with two markers - Method I
    /// <summary>
    /// Create a line symbol with a dash and two markers.<br/>          
    /// </summary>
    /// <remarks>
    /// This line symbol comprises three symbol layers listed below: 
    /// 1. A solid stroke that has dashes.
    /// 1. A circle marker.
    /// 1. A square marker.
    /// ![LineSymbolTwoMarkers](http://Esri.github.io/arcgis-pro-sdk/images/Symbology/line-dash-two-markers.png)
    /// </remarks>
    /// <returns></returns>
    internal static Task<CIMLineSymbol> CreateLineDashTwoMarkersAync()
    {
      return QueuedTask.Run<CIMLineSymbol>(() =>
      {
    
        var dash2MarkersLine = new CIMLineSymbol();
    
        var mySymbolLyrs = new CIMSymbolLayer[]
              {
                    new CIMSolidStroke()
                    {
                        Color = ColorFactory.Instance.BlackRGB,
                        Enable = true,
                        ColorLocked = true,
                        CapStyle = LineCapStyle.Round,
                        JoinStyle = LineJoinStyle.Round,
                        LineStyle3D = Simple3DLineStyle.Strip,
                        MiterLimit = 10,
                        Width = 1,
                        CloseCaps3D = false,
                        Effects = new CIMGeometricEffect[]
                        {
                            new CIMGeometricEffectDashes()
                            {
                                CustomEndingOffset = 0,
                                DashTemplate = new double[] {20, 10, 20, 10},
                                LineDashEnding = LineDashEnding.HalfPattern,
                                OffsetAlongLine = 0,
                                ControlPointEnding = LineDashEnding.NoConstraint
                            },
                            new CIMGeometricEffectOffset()
                            {
                                Method = GeometricEffectOffsetMethod.Bevelled,
                                Offset = 0,
                                Option = GeometricEffectOffsetOption.Fast
                            }
                        },
                    },
                    CreateCircleMarkerPerSpecs(),
                    CreateSquareMarkerPerSpecs()
          };
        dash2MarkersLine.SymbolLayers = mySymbolLyrs;
        return dash2MarkersLine;
      });
    }
    private static CIMMarker CreateCircleMarkerPerSpecs()
    {
      var circleMarker = SymbolFactory.Instance.ConstructMarker(ColorFactory.Instance.BlackRGB, 5, SimpleMarkerStyle.Circle) as CIMVectorMarker;
      //Modifying the marker to align with line
      //First define "markerplacement"
      CIMMarkerPlacementAlongLineSameSize markerPlacement = new CIMMarkerPlacementAlongLineSameSize()
      {
        AngleToLine = true,
        Offset = 0,
        Endings = PlacementEndings.Custom,
        OffsetAlongLine = 15,
        PlacementTemplate = new double[] { 60 }
      };
      //assign the markerplacement to the marker
      circleMarker.MarkerPlacement = markerPlacement;
      return circleMarker;
    }
    private static CIMMarker CreateSquareMarkerPerSpecs()
    {
      var squareMarker = SymbolFactory.Instance.ConstructMarker(ColorFactory.Instance.BlueRGB, 5, SimpleMarkerStyle.Square) as CIMVectorMarker;
      CIMMarkerPlacementAlongLineSameSize markerPlacement2 = new CIMMarkerPlacementAlongLineSameSize()
      {
        AngleToLine = true,
        Endings = PlacementEndings.Custom,
        OffsetAlongLine = 45,
        PlacementTemplate = new double[] { 60 },
      };
      squareMarker.MarkerPlacement = markerPlacement2;
      return squareMarker;
    }
    
    Snippet Dash line with two markers - Method II
    /// <summary>
    /// Create a line symbol with a dash and two markers. <br/>
    /// In this pattern of creating this symbol, a [CIMVectorMarker](https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic6176.html) object is created as a new [CIMSymbolLayer](https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic5503.html).
    /// The circle and square markers created by [ContructMarker](https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic12350.html) method is then assigned to the [MarkerGraphics](https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic6188.html) property of the CIMVectorMarker. 
    /// When using this method, the CIMVectorMarker's [Frame](https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic6187.html) property needs to be set to the [CIMMarker](https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic3264.html) object's Frame. 
    /// Similarly, the CIMVectorMarker's [Size](https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic3284.html) property needs to be set to the CIMMarker object's size.
    /// </summary>
    /// <remarks>
    /// This line symbol comprises three symbol layers listed below: 
    /// 1. A solid stroke that has dashes.
    /// 1. A circle marker.
    /// 1. A square marker.
    /// ![LineSymbolTwoMarkers](http://Esri.github.io/arcgis-pro-sdk/images/Symbology/line-dash-two-markers.png)
    /// </remarks>
    /// <returns></returns>
    
    internal static Task<CIMLineSymbol> CreateLineDashTwoMarkers2Async()
    {
      return QueuedTask.Run<CIMLineSymbol>(() =>
      {
        //default line symbol that will get modified.
        var dash2MarkersLine = new CIMLineSymbol();
        //circle marker to be used in our line symbol as a layer
        var circleMarker = SymbolFactory.Instance.ConstructMarker(ColorFactory.Instance.BlackRGB, 5, SimpleMarkerStyle.Circle) as CIMVectorMarker;
        //circle marker to be used in our line symbol as a layer
        var squareMarker = SymbolFactory.Instance.ConstructMarker(ColorFactory.Instance.BlueRGB, 5, SimpleMarkerStyle.Square) as CIMVectorMarker;
        //Create the array of layers that make the new line symbol
        CIMSymbolLayer[] mySymbolLyrs =
              {
                    new CIMSolidStroke() //dash line
                    {
                        Color = ColorFactory.Instance.BlackRGB,
                        Enable = true,
                        ColorLocked = true,
                        CapStyle = LineCapStyle.Round,
                        JoinStyle = LineJoinStyle.Round,
                        LineStyle3D = Simple3DLineStyle.Strip,
                        MiterLimit = 10,
                        Width = 1,
                        CloseCaps3D = false,
                        Effects = new CIMGeometricEffect[]
                        {
                            new CIMGeometricEffectDashes()
                            {
                                CustomEndingOffset = 0,
                                DashTemplate = new double[] {20, 10, 20, 10},
                                LineDashEnding = LineDashEnding.HalfPattern,
                                OffsetAlongLine = 0,
                                ControlPointEnding = LineDashEnding.NoConstraint
                            },
                            new CIMGeometricEffectOffset()
                            {
                                Method = GeometricEffectOffsetMethod.Bevelled,
                                Offset = 0,
                                Option = GeometricEffectOffsetOption.Fast
                            }
                        }
                    },
                    new CIMVectorMarker() //circle marker
                    {
                        MarkerGraphics = circleMarker.MarkerGraphics,
                        Frame = circleMarker.Frame, //need to match the CIMVector marker's frame to the circleMarker's frame.
                        Size = circleMarker.Size,    //need to match the CIMVector marker's size to the circleMarker's size.                    
                       MarkerPlacement = new CIMMarkerPlacementAlongLineSameSize()
                       {
                           AngleToLine = true,
                           Offset = 0,
                           Endings = PlacementEndings.Custom,
                           OffsetAlongLine = 15,
                           PlacementTemplate = new double[] {60},
                       }
    
                    },
                    new CIMVectorMarker() //square marker
                    {
                       MarkerGraphics = squareMarker.MarkerGraphics,
                       Frame = squareMarker.Frame, //need to match the CIMVector marker's frame to the squareMarker frame.
                       Size = squareMarker.Size, //need to match the CIMVector marker's size to the squareMarker size.
                       MarkerPlacement = new CIMMarkerPlacementAlongLineSameSize()
                       {
                           AngleToLine = true,
                           Endings = PlacementEndings.Custom,
                           OffsetAlongLine = 45,
                           PlacementTemplate = new double[] {60},
                       }
                    }
          };
        dash2MarkersLine.SymbolLayers = mySymbolLyrs;
        return dash2MarkersLine;
      });
    
    }
    Snippet Diagonal cross hatch fill
    /// <summary>
    /// Create a polygon symbol with a diagonal cross hatch fill. <br/>
    /// ![PolygonSymbolDiagonalCrossHatch](http://Esri.github.io/arcgis-pro-sdk/images/Symbology/polygon-diagonal-crosshatch.png)
    /// </summary>
    /// <returns></returns>
    public static Task<CIMPolygonSymbol> CreateDiagonalCrossPolygonAsync()
    {
      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);
    
        //Stroke for the fill
        var solid = SymbolFactory.Instance.ConstructStroke(CIMColor.CreateRGBColor(255, 0, 0, trans), 1.0, SimpleLineStyle.Solid);
    
        //Mimic cross hatch
        CIMFill[] diagonalCross =
                  {
                    new CIMHatchFill() {
                        Enable = true,
                        Rotation = 45.0,
                        Separation = 5.0,
                        LineSymbol = new CIMLineSymbol() { SymbolLayers = new CIMSymbolLayer[1] { solid } }
                    },
                    new CIMHatchFill() {
                        Enable = true,
                        Rotation = -45.0,
                        Separation = 5.0,
                        LineSymbol = new CIMLineSymbol() { SymbolLayers = new CIMSymbolLayer[1] { solid } }
                    }
          };
        List<CIMSymbolLayer> symbolLayers = new List<CIMSymbolLayer>
          {
                    outline
          };
        foreach (var fill in diagonalCross)
          symbolLayers.Add(fill);
        return new CIMPolygonSymbol() { SymbolLayers = symbolLayers.ToArray() };
      });
    }
    Inheritance Hierarchy

    System.Object
       ArcGIS.Core.CIM.CIMObject
          ArcGIS.Core.CIM.CIMSymbol
             ArcGIS.Core.CIM.CIMMultiLayerSymbol
                ArcGIS.Core.CIM.CIMLineSymbol

    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also