/// <summary>
/// Renders a feature layer using an unclassed color gradient.
/// 
/// </summary>
/// <returns>
/// </returns>
internal static Task UnclassedRenderer()
{
//Check feature layer name
//Code works with the USDemographics feature layer available with the ArcGIS Pro SDK Sample data
var featureLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType <FeatureLayer>().FirstOrDefault(f => f.Name == "U.S. National Transportation Atlas Interstate Highways");
if (featureLayer == null)
{
MessageBox.Show("This renderer works with the U.S. National Transportation Atlas Interstate Highways feature layer available with the ArcGIS Pro SDK Sample data", "Data missing");
return(Task.FromResult(0));
}
return(QueuedTask.Run(() =>
{
//Gets the first numeric field of the feature layer
var firstNumericFieldOfFeatureLayer = SDKHelpers.GetNumericField(featureLayer);
//Gets the min and max value of the field
var labels = SDKHelpers.GetFieldMinMax(featureLayer, firstNumericFieldOfFeatureLayer);
UnclassedColorsRendererDefinition ucDef = new UnclassedColorsRendererDefinition()
{
Field = firstNumericFieldOfFeatureLayer,
ColorRamp = SDKHelpers.GetColorRamp(),
LowerColorStop = Convert.ToDouble(labels.Item1),
UpperColorStop = Convert.ToDouble(labels.Item2),
UpperLabel = labels.Item2,
LowerLabel = labels.Item1,
};
CIMClassBreaksRenderer renderer = (CIMClassBreaksRenderer)featureLayer.CreateRenderer(ucDef);
featureLayer?.SetRenderer(renderer);
}));
}
/// <summary>
/// Renders a feature layer using unique values from one or multiple fields
/// </summary>
/// <remarks>
/// 
/// </remarks>
/// <returns>
/// 
/// </returns>
internal static Task UniqueValueRendererAsync()
{
//Check feature layer name
//Code works with the USDemographics feature layer available with the ArcGIS Pro SDK Sample data
var featureLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType <FeatureLayer>().FirstOrDefault(f => f.Name == "USDemographics");
if (featureLayer == null)
{
MessageBox.Show("This renderer works with the USDemographics feature layer available with the ArcGIS Pro SDK Sample data", "Data missing");
return(Task.FromResult(0));
}
return(QueuedTask.Run(() =>
{
//construct unique value renderer definition
UniqueValueRendererDefinition uvr = new
UniqueValueRendererDefinition()
{
ValueFields = new List <string> {
SDKHelpers.GetDisplayField(featureLayer)
}, //multiple fields in the array if needed.
ColorRamp = SDKHelpers.GetColorRamp(), //Specify color ramp
};
//Creates a "Renderer"
var cimRenderer = featureLayer.CreateRenderer(uvr);
//Sets the renderer to the feature layer
featureLayer.SetRenderer(cimRenderer);
}));
}
/// <summary>
/// Renders a feature layer using graduated colors to draw quantities. The outline width is varied based on attributes.
/// 
/// </summary>
/// <param name="featureLayer"></param>
/// <returns></returns>
internal static Task CBRendererGraduatedColorsOutline(FeatureLayer featureLayer)
{
return(QueuedTask.Run(() =>
{
//Gets the first numeric field of the feature layer
var firstNumericFieldOfFeatureLayer = SDKHelpers.GetNumericField(featureLayer);
//Gets the min and max value of the field
var minMax = SDKHelpers.GetFieldMinMax(featureLayer, firstNumericFieldOfFeatureLayer);
GraduatedColorsRendererDefinition gcDef = new GraduatedColorsRendererDefinition()
{
ClassificationField = SDKHelpers.GetNumericField(featureLayer),
ClassificationMethod = ClassificationMethod.NaturalBreaks,
BreakCount = 5,
ColorRamp = SDKHelpers.GetColorRamp()
};
CIMClassBreaksRenderer renderer = (CIMClassBreaksRenderer)featureLayer.CreateRenderer(gcDef);
//Create array of CIMVisualVariables to hold the outline information.
var visualVariables = new CIMVisualVariable[] {
new CIMSizeVisualVariable
{
ValueExpressionInfo = new CIMExpressionInfo
{
Title = "Custom",
Expression = "$feature.AREA",
ReturnType = ExpressionReturnType.Default
},
AuthoringInfo = new CIMVisualVariableAuthoringInfo
{
MinSliderValue = Convert.ToDouble(minMax.Item1),
MaxSliderValue = Convert.ToDouble(minMax.Item2),
ShowLegend = false,
Heading = firstNumericFieldOfFeatureLayer
},
VariableType = SizeVisualVariableType.Graduated,
Target = "outline",
MinSize = 1,
MaxSize = 13,
MinValue = Convert.ToDouble(minMax.Item1),
MaxValue = Convert.ToDouble(minMax.Item2)
},
};
renderer.VisualVariables = visualVariables;
featureLayer?.SetRenderer(renderer);
}));
}