private IClassBreaksRenderer CreateClassBreaksRenderer(IFeatureClass featureClass, string breakMethod)
{
ITable pTable = (ITable)featureClass;
//从pTable的strRendererField字段中得到信息给datavalues和datafrequency两个数组
ITableHistogram pTableHistogram = new BasicTableHistogramClass();
IBasicHistogram pHistogram = (IBasicHistogram)pTableHistogram;
pTableHistogram.Field = strRendererField;
if (strNormalizeField.ToLower() != "none")
pTableHistogram.NormField = strNormalizeField;
pTableHistogram.Table = pTable;
object dataFrequency;
object dataValues;
pHistogram.GetHistogram(out dataValues, out dataFrequency);
//下面是分级方法，用于根据获得的值计算得出符合要求的数据
//根据条件计算出Classes和ClassesCount，numDesiredClasses为预定的分级数目
IClassifyGEN pClassify = null;
int numDesiredClasses = classCount;
switch (breakMethod)
{
case "等间隔":
pClassify = new EqualIntervalClass();
break;
case "已定义的间隔":
pClassify = new DefinedIntervalClass();
IIntervalRange2 intervalRange = pClassify as IIntervalRange2;
intervalRange.IntervalRange = dblDefinedInterval;
break;
case "分位数":
pClassify = new QuantileClass();
break;
case "自然裂点":
pClassify = new NaturalBreaksClass();
break;
case "标准差":
pClassify = new StandardDeviationClass();
IStatisticsResults pStatRes = pHistogram as IStatisticsResults;
IDeviationInterval pStdDev = pClassify as IDeviationInterval;
pStdDev.Mean = pStatRes.Mean;
pStdDev.StandardDev = pStatRes.StandardDeviation;
pStdDev.DeviationInterval = dblStdDevInterval;
break;
default:
break;
}
if (pClassify == null) return null;
pClassify.Classify(dataValues, dataFrequency, ref numDesiredClasses);
//返回一个数组
double[] classBreaks = (double[])pClassify.ClassBreaks;
int ClassesCount = classBreaks.GetUpperBound(0);
nudClassCount.Value = ClassesCount;
IClassBreaksRenderer pClassBreaksRenderer = new ClassBreaksRendererClass();
pClassBreaksRenderer.Field = strRendererField;
if (strNormalizeField.ToLower() != "none")
pClassBreaksRenderer.NormField = strNormalizeField;
//设置着色对象的分级数目
pClassBreaksRenderer.BreakCount = ClassesCount;
pClassBreaksRenderer.SortClassesAscending = true;
if (colorRamp == null)
{
MessageBox.Show("请先选择色带！！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return null;
}
//通过色带设置各级分类符号的颜色
colorRamp.Size = ClassesCount;
bool createRamp;
colorRamp.CreateRamp(out createRamp);
IEnumColors enumColors = colorRamp.Colors;
enumColors.Reset();
IColor pColor = null;
ISymbol symbol = null;
if (gloabalSymbol == null)
{
MessageBox.Show("请选择符号...", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return null;
}
//需要注意的是分级着色对象中的symbol和break的下标都是从0开始
for (int i = 0; i < ClassesCount; i++)
{
pColor = enumColors.Next();
switch (featureClass.ShapeType)
{
case esriGeometryType.esriGeometryPoint:
IMarkerSymbol markerSymbol = gloabalSymbol as IMarkerSymbol;
markerSymbol.Color = pColor;
symbol = markerSymbol as ISymbol;
break;
case esriGeometryType.esriGeometryPolyline:
ILineSymbol lineSymbol = gloabalSymbol as ILineSymbol;
lineSymbol.Color = pColor;
symbol = lineSymbol as ISymbol;
break;
case esriGeometryType.esriGeometryPolygon:
IFillSymbol fillSymbol = gloabalSymbol as IFillSymbol;
fillSymbol.Color = pColor;
symbol = fillSymbol as ISymbol;
break;
default:
break;
}
pClassBreaksRenderer.set_Symbol(i, symbol);
pClassBreaksRenderer.set_Break(i, classBreaks[i + 1]);
}
return pClassBreaksRenderer;
}
private IClassBreaksRenderer CreateClassBreaksRenderer(IFeatureClass featureClass, string breakMethod)
{
ITable pTable = (ITable)featureClass;
//从pTable的strRendererField字段中得到信息给datavalues和datafrequency两个数组
ITableHistogram pTableHistogram = new BasicTableHistogramClass();
IBasicHistogram pHistogram = (IBasicHistogram)pTableHistogram;
pTableHistogram.Field = strRendererField;
if (strNormalizeField.ToLower() != "none")
{
pTableHistogram.NormField = strNormalizeField;
}
pTableHistogram.Table = pTable;
object dataFrequency;
object dataValues;
pHistogram.GetHistogram(out dataValues, out dataFrequency);
//下面是分级方法，用于根据获得的值计算得出符合要求的数据
//根据条件计算出Classes和ClassesCount，numDesiredClasses为预定的分级数目
IClassifyGEN pClassify = null;
int numDesiredClasses = classCount;
switch (breakMethod)
{
case "等间隔":
pClassify = new EqualIntervalClass();
break;
case "已定义的间隔":
pClassify = new DefinedIntervalClass();
IIntervalRange2 intervalRange = pClassify as IIntervalRange2;
intervalRange.IntervalRange = dblDefinedInterval;
break;
case "分位数":
pClassify = new QuantileClass();
break;
case "自然裂点":
pClassify = new NaturalBreaksClass();
break;
case "标准差":
pClassify = new StandardDeviationClass();
IStatisticsResults pStatRes = pHistogram as IStatisticsResults;
IDeviationInterval pStdDev = pClassify as IDeviationInterval;
pStdDev.Mean = pStatRes.Mean;
pStdDev.StandardDev = pStatRes.StandardDeviation;
pStdDev.DeviationInterval = dblStdDevInterval;
break;
default:
break;
}
if (pClassify == null)
{
return(null);
}
pClassify.Classify(dataValues, dataFrequency, ref numDesiredClasses);
//返回一个数组
double[] classBreaks = (double[])pClassify.ClassBreaks;
int ClassesCount = classBreaks.GetUpperBound(0);
nudClassCount.Value = ClassesCount;
IClassBreaksRenderer pClassBreaksRenderer = new ClassBreaksRendererClass();
pClassBreaksRenderer.Field = strRendererField;
if (strNormalizeField.ToLower() != "none")
{
pClassBreaksRenderer.NormField = strNormalizeField;
}
//设置着色对象的分级数目
pClassBreaksRenderer.BreakCount = ClassesCount;
pClassBreaksRenderer.SortClassesAscending = true;
if (colorRamp == null)
{
MessageBox.Show("请先选择色带！！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(null);
}
//通过色带设置各级分类符号的颜色
colorRamp.Size = ClassesCount;
bool createRamp;
colorRamp.CreateRamp(out createRamp);
IEnumColors enumColors = colorRamp.Colors;
enumColors.Reset();
IColor pColor = null;
ISymbol symbol = null;
if (gloabalSymbol == null)
{
MessageBox.Show("请选择符号...", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return(null);
}
//需要注意的是分级着色对象中的symbol和break的下标都是从0开始
for (int i = 0; i < ClassesCount; i++)
{
pColor = enumColors.Next();
switch (featureClass.ShapeType)
{
case esriGeometryType.esriGeometryPoint:
IMarkerSymbol markerSymbol = gloabalSymbol as IMarkerSymbol;
markerSymbol.Color = pColor;
symbol = markerSymbol as ISymbol;
break;
case esriGeometryType.esriGeometryPolyline:
ILineSymbol lineSymbol = gloabalSymbol as ILineSymbol;
lineSymbol.Color = pColor;
symbol = lineSymbol as ISymbol;
break;
case esriGeometryType.esriGeometryPolygon:
IFillSymbol fillSymbol = gloabalSymbol as IFillSymbol;
fillSymbol.Color = pColor;
symbol = fillSymbol as ISymbol;
break;
default:
break;
}
pClassBreaksRenderer.set_Symbol(i, symbol);
pClassBreaksRenderer.set_Break(i, classBreaks[i + 1]);
}
return(pClassBreaksRenderer);
}
private void getBreaksValues(ClassifyMethodName ClassifyMethod,ILayer layer,string fieldName,double intervl,bool bfeuq)
{
ITableHistogram tableHistogram = new BasicTableHistogramClass();
tableHistogram.Table = ((IDisplayTable)layer).DisplayTable;
tableHistogram.Field = fieldName;
object valueArray = null, freq = null;
IBasicHistogram basicHistogram = (IBasicHistogram)tableHistogram;
basicHistogram.GetHistogram(out valueArray, out freq);
IClassify classify = null;
int breakNum = (int)intervl;
//�����
switch (ClassifyMethod)
{
case ClassifyMethodName.EqualInterval:
{
EqualIntervalClass eq = new EqualIntervalClass();
eq.Classify(valueArray, freq, ref breakNum);
classify = (IClassify)eq;
break;
}
case ClassifyMethodName.StandardDeviation:
{
StandardDeviationClass sd = new StandardDeviationClass();
IStatisticsResults stat = basicHistogram as IStatisticsResults;
classify = sd as IClassify;
classify.SetHistogramData(valueArray, freq);
IDeviationInterval di = sd as IDeviationInterval;
di.DeviationInterval = 1;
di.Mean = stat.Mean;
di.StandardDev = stat.StandardDeviation;
classify.Classify(ref breakNum);
break;
}
case ClassifyMethodName.Quantile:
{
Quantile qc = new QuantileClass();
qc.Classify(valueArray, freq, ref breakNum);
classify = qc as IClassify;
break;
}
case ClassifyMethodName.NaturalBreaks:
{
NaturalBreaksClass nb = new NaturalBreaksClass();
nb.Classify(valueArray, freq, ref breakNum);
classify = nb as IClassify;
break;
}
case ClassifyMethodName.DefinedInterval:
{
DefinedIntervalClass di = new DefinedIntervalClass();
di.IntervalRange = intervl;
di.Classify(valueArray, freq, ref breakNum);
classify = di as IClassify;
break;
}
default:
{
EqualIntervalClass eq = new EqualIntervalClass();
eq.Classify(valueArray, freq, ref breakNum);
classify = (IClassify)eq;
break;
}
}
object o = classify.ClassBreaks;
System.Array breakArray = o as System.Array;
IFrequencyStatistics freqstat = basicHistogram as IFrequencyStatistics;
lscBreakValues.Items.Clear();
foreach (object oo in breakArray)
{
lscBreakValues.Items.Add(oo.ToString());
}
}
