Returns a collection of color ramp style items that satisfy the search criteria. This method must be called on the MCT. Use QueuedTask.Run.
How to search for color ramps in a style
public async Task<IList<ColorRampStyleItem>> GetColorRampsFromStyleAsync(StyleProjectItem style, string searchString)
{
//StyleProjectItem can be "ColorBrewer Schemes (RGB)", "ArcGIS 2D"...
if (style == null)
throw new System.ArgumentNullException();
//Search for color ramps
//Color Ramp searchString can be "Spectral (7 Classes)", "Pastel 1 (3 Classes)", "Red-Gray (10 Classes)"..
return await QueuedTask.Run(() => style.SearchColorRamps(searchString));
}
How to apply a color ramp from a style to a feature layer
public async Task ApplyColorRampAsync(FeatureLayer featureLayer, List<string> fields)
{
StyleProjectItem style =
Project.Current.GetItems<StyleProjectItem>()
.FirstOrDefault(s => s.Name == "ColorBrewer Schemes (RGB)");
if (style == null) return;
var colorRampList = await QueuedTask.Run(() =>
style.SearchColorRamps("Red-Gray (10 Classes)"));
if (colorRampList == null || colorRampList.Count == 0) return;
CIMColorRamp cimColorRamp = null;
CIMRenderer renderer = null;
await QueuedTask.Run(() =>
{
cimColorRamp = colorRampList[0].ColorRamp;
var rendererDef = new UniqueValueRendererDefinition(fields, null, cimColorRamp);
renderer = featureLayer?.CreateRenderer(rendererDef);
featureLayer?.SetRenderer(renderer);
});
}
How to apply a color ramp from a style to a feature layer
public async Task ApplyColorRampAsync(FeatureLayer featureLayer, List<string> fields)
{
StyleProjectItem style =
Project.Current.GetItems<StyleProjectItem>()
.FirstOrDefault(s => s.Name == "ColorBrewer Schemes (RGB)");
if (style == null) return;
var colorRampList = await QueuedTask.Run(() =>
style.SearchColorRamps("Red-Gray (10 Classes)"));
if (colorRampList == null || colorRampList.Count == 0) return;
CIMColorRamp cimColorRamp = null;
CIMRenderer renderer = null;
await QueuedTask.Run(() =>
{
cimColorRamp = colorRampList[0].ColorRamp;
var rendererDef = new UniqueValueRendererDefinition(fields, null, cimColorRamp);
renderer = featureLayer?.CreateRenderer(rendererDef);
featureLayer?.SetRenderer(renderer);
});
}
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);
});
Create and Set a Stretch Renderer
//Must be called on the MCT
//var pcsl = ...;
//At 2.x - var fields = pcsl.QueryAvailablePointCloudRendererFields(
// PointCloudRendererType.StretchRenderer);
var fields = pcsl.GetAvailablePointCloudRendererFields(
PointCloudRendererType.StretchRenderer);
var stretchDef = new PointCloudRendererDefinition(
PointCloudRendererType.StretchRenderer)
{
//Will be either ELEVATION or INTENSITY
Field = fields[0]
};
//Create the CIM Renderer
var stretchRenderer = pcsl.CreateRenderer(stretchDef)
as CIMPointCloudStretchRenderer;
//Apply a color ramp
var style = Project.Current.GetItems<StyleProjectItem>()
.First(s => s.Name == "ArcGIS Colors");
var colorRamp = style.SearchColorRamps("").First();
stretchRenderer.ColorRamp = colorRamp.ColorRamp;
//Apply modulation
stretchRenderer.ColorModulation = new CIMColorModulationInfo()
{
MinValue = 0,
MaxValue = 100
};
//apply the renderer
pcsl.SetRenderer(stretchRenderer);
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.