public Classifier(IServerContext mapContext, double [] values, int [] counts, String classifierType, int breaks)
{
m_classifier = (IClassifyGEN)mapContext.CreateObject("esriSystem." + classifierType);
int b = breaks;
m_classifier.Classify(values, counts, ref b);
m_breaks = b;
}
/// <summary>
/// Returns breaks based on the given arguments.
/// </summary>
/// <param name="method">The classification method</param>
/// <param name="featureClass">The featureClass with the data</param>
/// <param name="field">The field to specify the data</param>
/// <param name="numberOfClasses">The number of classes</param>
/// <returns>An array of breaks. NOTE: the first value in the array is the smallest and not part of the breaks. Find more at: http://help.arcgis.com/en/sdk/10.0/arcobjects_net/componenthelp/index.html#/IClassifyGEN_Interface/0042000000m2000000/ </returns>
public static double[] Classify(IClassifyGEN method, IFeatureClass featureClass, IField field, int numberOfClasses)
{
double[] data;
int[] freq;
var numberClasses = numberOfClasses;
Histogram(featureClass, field, out data, out freq);
method.Classify(data, freq, numberOfClasses);
return(method.ClassBreaks as double[]);
}
private void btRender_Click(object sender, EventArgs e)
{
int number = 0;
if (cbColorRamp.SelectedIndex == -1)
{
if (lang == Language.Chinese)
{
MessageBox.Show("请先选择一种色带");
}
else if (lang == Language.English)
{
MessageBox.Show("Please choose a color ribbon first");
}
return;
}
try
{
number = int.Parse(txtNumber.Text);
if (number <= 1)
{
if (lang == Language.Chinese)
{
MessageBox.Show("类别数量只能为>1的正整数");
}
else if (lang == Language.English)
{
MessageBox.Show("The class number can only be a positive integer of >1");
}
}
}
catch
{
if (lang == Language.Chinese)
{
MessageBox.Show("类别数量只能为整数");
}
else if (lang == Language.English)
{
MessageBox.Show("The class number can only be an integer");
}
}
IRasterClassifyColorRampRenderer pRasterClassifyRenderer = new RasterClassifyColorRampRendererClass();
IRasterRenderer pRasterRenderer = pRasterClassifyRenderer as IRasterRenderer;
IUniqueValues uniVal = new UniqueValuesClass();
IRasterCalcUniqueValues2 calValues = new RasterCalcUniqueValuesClass();
calValues.MaxUniqueValueCount = 10000000;
calValues.AddFromRaster(rasterLayer.Raster, cbSelectedBand.SelectedIndex, uniVal);
object vValues, vFrequences;
uniVal.GetHistogram(out vValues, out vFrequences);
double[] doubleArray = (double[])vValues;
int[] longArray = (int[])vFrequences;
int order = SortTool.CheckInOrder(doubleArray, doubleArray.Length);
if (order == 0)
{
SortTool.QuickSort3(doubleArray, 0, doubleArray.Length - 1, longArray);
}
else if (order == -1)
{
SortTool.Reverse(doubleArray, doubleArray.Length, longArray);
}
IClassifyGEN classify = GetMethod(cbMethod.Text);
classify.Classify((double[])vValues, (int[])vFrequences, ref number);
double[] classes = classify.ClassBreaks as double[];
pRasterRenderer.Raster = rasterLayer.Raster;
pRasterClassifyRenderer.ClassCount = number;
for (int i = 0; i < classes.Length; i++)
{
pRasterClassifyRenderer.set_Break(i, classes[i]);
}
pRasterRenderer.Update();
IStyleGalleryItem galleryItem = symbol.GetItem(cbColorRamp.SelectedIndex);
IColorRamp colorRamp = galleryItem.Item as IColorRamp;
IFillSymbol fill = new SimpleFillSymbolClass() as IFillSymbol;
int increase = colorRamp.Size / (number - 1);
for (int i = 0; i < pRasterClassifyRenderer.ClassCount - 1; i++)
{
fill.Color = colorRamp.get_Color(i * increase);
pRasterClassifyRenderer.set_Symbol(i, fill as ISymbol);
pRasterClassifyRenderer.set_Label(i, pRasterClassifyRenderer.get_Break(i).ToString() + "-" + pRasterClassifyRenderer.get_Break(i + 1).ToString());
}
fill.Color = colorRamp.get_Color(colorRamp.Size - 1);
pRasterClassifyRenderer.set_Symbol(pRasterClassifyRenderer.ClassCount - 1, fill as ISymbol);
pRasterClassifyRenderer.set_Label(pRasterClassifyRenderer.ClassCount - 1, pRasterClassifyRenderer.get_Break(pRasterClassifyRenderer.ClassCount - 1).ToString() + "-" + pRasterClassifyRenderer.get_Break(pRasterClassifyRenderer.ClassCount).ToString());
rasterLayer.Renderer = pRasterRenderer;
succeed = true;
this.Close();
}