GraduatedColorsRendererDefinition Class

In This Topic

Represents graduated color renderer definition to show qualitative differences in feature values with a range of color.

Object Model

Syntax

C#
Visual Basic (Declaration)

public class GraduatedColorsRendererDefinition : ClassBreaksRendererDefinition

Public Class GraduatedColorsRendererDefinition 
   Inherits ClassBreaksRendererDefinition

Remarks

GraduatedColorsRendererDefinition class allow you to define parameters to create renderers to draw features with graduated color based on the values of a quantitative attribute that is statistically grouped by a classification algorithm.
Once you define a graduated color renderer, you can call a FeatureLayer's CreateRenderer and SetRenderer methods to create and assign a renderer to a feature layer.

Example

Create a feature layer with class breaks renderer with defaults

await QueuedTask.Run(() =>
{
  var featureLayerCreationParams = new FeatureLayerCreationParams(new Uri(@"c:\data\countydata.gdb\counties"))
  {
    Name = "Population Density (sq mi) Year 2010",
    RendererDefinition = new GraduatedColorsRendererDefinition("POP10_SQMI")
  };
  LayerFactory.Instance.CreateLayer<FeatureLayer>(
    featureLayerCreationParams,
    MapView.Active.Map
  );
});

Create a feature layer with class breaks renderer

string colorBrewerSchemesName = "ColorBrewer Schemes (RGB)";
StyleProjectItem style = Project.Current.GetItems<StyleProjectItem>().First(s => s.Name == colorBrewerSchemesName);
string colorRampName = "Greens (Continuous)";
IList<ColorRampStyleItem> colorRampList = await QueuedTask.Run(() =>
{
  return style.SearchColorRamps(colorRampName);
});
ColorRampStyleItem colorRamp = colorRampList[0];

await QueuedTask.Run(() =>
{
  GraduatedColorsRendererDefinition gcDef = new GraduatedColorsRendererDefinition()
  {
    ClassificationField = "CROP_ACR07",
    ClassificationMethod = ArcGIS.Core.CIM.ClassificationMethod.NaturalBreaks,
    BreakCount = 6,
    ColorRamp = colorRamp.ColorRamp,
    SymbolTemplate = SymbolFactory.Instance.ConstructPolygonSymbol(
                            ColorFactory.Instance.GreenRGB, SimpleFillStyle.Solid, null).MakeSymbolReference(),
    ExclusionClause = "CROP_ACR07 = -99",
    ExclusionSymbol = SymbolFactory.Instance.ConstructPolygonSymbol(
                            ColorFactory.Instance.RedRGB, SimpleFillStyle.Solid, null).MakeSymbolReference(),
    ExclusionLabel = "No yield",
  };
  var featureLayerCreationParams = new FeatureLayerCreationParams((new Uri(@"c:\Data\CountyData.gdb\Counties")))
  {
    Name = "Crop",
    RendererDefinition = gcDef
  };
  LayerFactory.Instance.CreateLayer<FeatureLayer>(featureLayerCreationParams, MapView.Active.Map);
});

Inheritance Hierarchy

System.Object
   ArcGIS.Desktop.Mapping.LayerDrawingDefinition
      ArcGIS.Desktop.Mapping.RendererDefinition
         ArcGIS.Desktop.Mapping.ClassBreaksRendererDefinition
            ArcGIS.Desktop.Mapping.GraduatedColorsRendererDefinition

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

GraduatedColorsRendererDefinition Members
ArcGIS.Desktop.Mapping Namespace

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