Set number of decimals in toc when using class breaks renderer

Question

Is there a way to define the number of decimals/format of the labels in the toc when using the class breaks renderer (GraduatedColorsRendererDefinition).

And,, if the field used for the renderer is empty. show a diferent output in the toc.

GraduatedColorsRendererDefinition gcDef = new GraduatedColorsRendererDefinition()
           {
               ClassificationField = "xyz",
               ClassificationMethod = ClassificationMethod.NaturalBreaks,
               BreakCount = 5,
               ColorRamp = colorRamp,

ExclusionClause = $"{xyz} IS Null Or {xyz} = 0",
               ExclusionSymbol = emptySymbol,
               ExclusionLabel = "No value",
           };

No values shows :

UmaHarano · Accepted Answer

@MariusN

You can use the CIMNumericFormat to format the labels on the renderer. Once your modify the renderer with this format, call the RecalculateRenderer method to update the renderer with your format. Pass in "false" to this method so that it does not regenerate the values for the class breaks. Here is a code snippet

GraduatedColorsRendererDefinition gcDef = new GraduatedColorsRendererDefinition()
{
  ClassificationField = "POP2000",
  ClassificationMethod = ClassificationMethod.NaturalBreaks,
  BreakCount = 5,
  ColorRamp = GetColorRamp()

};
CIMClassBreaksRenderer renderer = (CIMClassBreaksRenderer)featureLayer.CreateRenderer(gcDef);

var numberFormat = new CIMNumericFormat
{
  RoundingValue = 4,
  RoundingOption = esriRoundingOptionEnum.esriRoundNumberOfDecimals,
  ZeroPad = false
};
renderer.NumberFormat = numberFormat;
featureLayer?.SetRenderer(renderer);
featureLayer?.RecalculateRenderer(false);