private void applyRenderer(IGeoFeatureLayer geoLayer, IServerContext mapContext, string fieldName, Classifier classifier)
{
IClassBreaksRenderer cbRenderer = (IClassBreaksRenderer)mapContext.CreateObject("esriCarto.ClassBreaksRenderer");
cbRenderer.Field = fieldName;
ILegendInfo legendInfo = (ILegendInfo)cbRenderer;
ILegendGroup legendGroup = legendInfo.get_LegendGroup(0);
legendGroup.Heading = "Counts";
int breaks = classifier.getBreaks();
IColor [] pColors = new IColor[breaks];
ISimpleFillSymbol [] symbols = new ISimpleFillSymbol[breaks];
double breakValue;
cbRenderer.BreakCount = breaks;
IAlgorithmicColorRamp colorRamp = (IAlgorithmicColorRamp)mapContext.CreateObject("esriDisplay.AlgorithmicColorRamp");
IColor startColor, endColor;
startColor = createRGBColor(mapContext, 255, 255, 0);
endColor = createRGBColor(mapContext, 255, 0, 0);
colorRamp.FromColor = startColor;
colorRamp.ToColor = endColor;
colorRamp.Algorithm = esriColorRampAlgorithm.esriCIELabAlgorithm;
colorRamp.Size = breaks;
bool created;
try
{
colorRamp.CreateRamp(out created);
}
catch
{
this.Label2.Text = "There is not enough data associated with the current extents and attributes selected. A map was not generated. Please try selecting other attributes.";
return;
}
IEnumColors iterColors = colorRamp.Colors;
double[] classBreaksArray = (double[])classifier.getClassBreaksArray();
for (int i = 0; i < breaks; i++)
{
pColors[i] = iterColors.Next();
symbols[i] = (ISimpleFillSymbol)mapContext.CreateObject("esriDisplay.SimpleFillSymbol");
symbols[i].Color = pColors[i];
cbRenderer.set_Symbol(i, (ISymbol)symbols[i]);
breakValue = classBreaksArray[i + 1];
cbRenderer.set_Break(i, breakValue);
string breakValueString = String.Format("{0:0.00}", breakValue);
if (i == 0)
{
cbRenderer.set_Label(i, "<" + breakValueString);
}
else
{
string prevValueString = String.Format("{0:0.00}", classBreaksArray[i]);
string label = prevValueString + " < " + breakValueString;
cbRenderer.set_Label(i, label);
}
}
geoLayer.Renderer = (IFeatureRenderer)cbRenderer;
this.Toc1.ExpandDepth = 1;
this.Toc1.Refresh();
}