转：各种专题图实现的C#源代码

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原文地址： http://bbs.esrichina-bj.cn/ESRI/viewthread.php?tid=29166&extra=&page=1

private void 点密度图ToolStripMenuItem_Click(object sender, EventArgs e)

{

//获取当前图层，并把它设置成IGeoFeatureLayer的实例

IMap pMap = axMapControl1.Map;

ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;

IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;

IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature

IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);

IFeature pFeature = pFeatureCursor.NextFeature();

///////////////////////

///////////////////////////////////////////////////////////////////

//定义点密度图渲染组件

IDotDensityRenderer DotDensityRenderer = new DotDensityRendererClass();

//定义点密度图渲染组件对象的渲染字段对象

IRendererFields flds = (IRendererFields)DotDensityRenderer;

flds.AddField("FID", "FID");

//flds.AddField("Shape", "Shape");

//定义点密度图渲染得符号对象

IDotDensityFillSymbol ddSym = new DotDensityFillSymbolClass();

IRgbColor BackColor = new RgbColorClass();

BackColor.Red = 234;

BackColor.Blue = 128;

BackColor.Green = 220;

IRgbColor SymbolColor = new RgbColorClass();

SymbolColor.Red = 234;

SymbolColor.Blue = 128;

SymbolColor.Green = 220;

////点密度图渲染背景颜色

//ddSym.BackgroundColor = BackColor;

ddSym.DotSize =8;

ddSym.FixedPlacement = true;

//ddSym.Color = SymbolColor;

ILineSymbol pLineSymbol=new CartographicLineSymbolClass();

ddSym.Outline = pLineSymbol;

//定义符号数组

ISymbolArray symArray = (ISymbolArray)ddSym;

//添加点密度图渲染的点符号到符号数组中去

ISimpleMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbolClass();

pMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;

pMarkerSymbol.Size = 2;

pMarkerSymbol.Color = SymbolColor;;

symArray.AddSymbol(pMarkerSymbol as ISymbol );

//设置点密度图渲染的点符号

//DotDensityRenderer.DotDensitySymbol =symArray;

DotDensityRenderer.DotDensitySymbol = ddSym;

//确定一个点代表多少值

DotDensityRenderer .DotValue=0.2;

//点密度渲染采用的颜色模式

DotDensityRenderer.ColorScheme = "Custom";

//创建点密度图渲染图例

DotDensityRenderer.CreateLegend();

//设置符号大小是否固定

DotDensityRenderer.MaintainSize = true;

//将点密度图渲染对象与渲染图层挂钩

pGeoFeatureLayer.Renderer = (IFeatureRenderer)DotDensityRenderer;

//刷新地图和TOOCotrol

IActiveView pActiveView = axMapControl1.Map as IActiveView;

pActiveView.Refresh();

axTOCControl1.Update();

}

private void 分层设色ToolStripMenuItem_Click(object sender, EventArgs e)

{

//获取当前图层，并把它设置成IGeoFeatureLayer的实例

IMap pMap = axMapControl1.Map;

ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;

IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;

IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature

IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);

IFeature pFeature = pFeatureCursor.NextFeature();

IFeatureRenderer PR=pGeoFeatureLayer.Renderer;

//JoinData("县级区域", "DZGB", "sectioncode"); //join外部表

// int DC ;

int desiredClasses = 5;

string fieldName = "AREA";

int classesCount;

double[] classes;

string strOutput = "";

bool ok;

object dataFrequency;

object dataValues;

ITable pTable ;

//IClassify pClassify;

EqualIntervalClass pClassify;

//IBasicHistogram pTableHistogram = new BasicTableHistogramClass();

//IHistogram pTableHistogram = new BasicTableHistogramClass();

ITableHistogram pTableHistogram = new BasicTableHistogramClass() as ITableHistogram;

IBasicHistogram pHistogram;

IClassBreaksRenderer pClassBreaksRenderer;

IHsvColor pFromColor;

IHsvColor pToColor;

IAlgorithmicColorRamp pAlgorithmicColorRamp;

IEnumColors pEnumColors;

IColor pColor;

ISimpleFillSymbol pSimpleFillSymbol;

pLayer = (IFeatureLayer)axMapControl1.get_Layer(0);

pGeoFeatureLayer = (IGeoFeatureLayer)pLayer;

pTable = (ITable)pGeoFeatureLayer;

pHistogram = (IBasicHistogram)pTableHistogram;

// Get values and frequencies for the field

pTableHistogram.Field = fieldName;

pTableHistogram.Table = pTable;

pHistogram.GetHistogram(out dataValues, out dataFrequency);

// Put values and frequencies into an Equal Interval Classify Object

pClassify = new EqualIntervalClass();

//pClassify = new NaturalBreaksClass();

pClassify.SetHistogramData(dataValues, dataFrequency);

pClassify.Classify(dataValues, dataFrequency, ref desiredClasses);

//pClassify.Classify(ref desiredClasses);

classes = (double[])pClassify.ClassBreaks;

classesCount = classes.Length;

// Initialise a new Class Breaks renderer

// Supply the number of Class Breaks and the field to perform the class breaks on

pClassBreaksRenderer = new ClassBreaksRendererClass();

pClassBreaksRenderer.Field = fieldName;

pClassBreaksRenderer.BreakCount = classesCount;

pClassBreaksRenderer.SortClassesAscending = true;

// Use algorithmic color ramp to generate an range of colors between YELLOW to RED

// Initial color: YELLOW

pFromColor = new HsvColorClass();

pFromColor.Hue = 60;

pFromColor.Saturation = 100;

pFromColor.Value = 96;

// Final color: RED

pToColor = new HsvColorClass();

pToColor.Hue = 0;

pToColor.Saturation = 100;

pToColor.Value = 96;

// Set up HSV Color ramp to span from YELLOW to RED

pAlgorithmicColorRamp = new AlgorithmicColorRampClass();

pAlgorithmicColorRamp.Algorithm = esriColorRampAlgorithm.esriHSVAlgorithm;

pAlgorithmicColorRamp.FromColor = pFromColor;

pAlgorithmicColorRamp.ToColor = pToColor;

pAlgorithmicColorRamp.Size = classesCount;

pAlgorithmicColorRamp.CreateRamp(out ok);

pEnumColors = pAlgorithmicColorRamp.Colors;

for (int index = 0; index < classesCount - 1; index++)

{

pColor = pEnumColors.Next();

pSimpleFillSymbol = new SimpleFillSymbolClass();

pSimpleFillSymbol.Color = pColor;

pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;

pClassBreaksRenderer.set_Symbol(index, (ISymbol)pSimpleFillSymbol);

pClassBreaksRenderer.set_Break(index, classes[index + 1]);

// Store each break value for user output

strOutput += "-" + classes[index + 1] + "\n";

}

pGeoFeatureLayer.Renderer = (IFeatureRenderer)pClassBreaksRenderer;

//this.axMapControl1.Refresh();

/////////////////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////////////////

//get the custom property from which is supposed to be the layer to be saved

object customProperty = null;

//IMapControl3 mapControl = null;

customProperty = axMapControl1.CustomProperty;

//ask the user to set a name for the new layer file

SaveFileDialog saveFileDialog = new SaveFileDialog();

saveFileDialog.Filter = "Layer File|*.lyr|All Files|*.*";

saveFileDialog.Title = "生成专题图";

saveFileDialog.RestoreDirectory = true;

saveFileDialog.FileName = System.IO.Path.Combine(saveFileDialog.InitialDirectory, pGeoFeatureLayer.Name + ".lyr");

//get the layer name from the user

DialogResult dr = saveFileDialog.ShowDialog();

if (saveFileDialog.FileName != "" && dr == DialogResult.OK)

{

if (System.IO.File.Exists(saveFileDialog.FileName))

{

//try to delete the existing file

System.IO.File.Delete(saveFileDialog.FileName);

}

//create a new LayerFile instance

ILayerFile layerFile = new LayerFileClass();

//create a new layer file

layerFile.New(saveFileDialog.FileName);

//attach the layer file with the actual layer

layerFile.ReplaceContents((ILayer)pGeoFeatureLayer);

//save the layer file

layerFile.Save();

//ask the user whether he'd like to add the layer to the map

if (DialogResult.Yes == MessageBox.Show("Would you like to add the layer to the map?", "Message", MessageBoxButtons.YesNo, MessageBoxIcon.Question))

{

axMapControl1.AddLayerFromFile(saveFileDialog.FileName, 0);

}

private void 单值图ToolStripMenuItem1_Click(object sender, EventArgs e)

{

//获取当前图层，并把它设置成IGeoFeatureLayer的实例

IMap pMap = axMapControl1.Map;

ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;

IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;

IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature

IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);

//定义单值图渲染组件

IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass();

//设置渲染字段对象

pUniqueValueRenderer.FieldCount = 1;

pUniqueValueRenderer.set_Field(0, "ID");

//创建填充符号

ISimpleFillSymbol PFillSymbol = new SimpleFillSymbolClass();

pUniqueValueRenderer.DefaultSymbol = (ISymbol)PFillSymbol;

pUniqueValueRenderer.UseDefaultSymbol = false;

//QI the table from the geoFeatureLayer and get the field number of

ITable pTable;

int fieldNumber;

pTable = pGeoFeatureLayer as ITable ;

fieldNumber = pTable.FindField("ID");

if (fieldNumber == -1)

{

MessageBox.Show("Can't find field called ", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

//创建并设置随机色谱

IRandomColorRamp pColorRamp = new RandomColorRampClass();

pColorRamp.StartHue = 0;

pColorRamp.MinValue = 99;

pColorRamp.MinSaturation = 15;

pColorRamp.EndHue = 360;

pColorRamp.MaxValue = 100;

pColorRamp.MaxSaturation = 30;

pColorRamp.Size = 100;

//pColorRamp.Size = pUniqueValueRenderer.ValueCount;

bool ok = true;

pColorRamp.CreateRamp(out ok);

IEnumColors pEnumRamp;

pEnumRamp = pColorRamp.Colors;

//为每个值设置一个符号

int n = pFeatureClass.FeatureCount(null);

for (int i = 0; i < n; i++)

{

IFeature pFeature = pFeatureCursor.NextFeature();

IClone pSourceClone = PFillSymbol as IClone;

ISimpleFillSymbol pSimpleFillSymbol = pSourceClone.Clone() as ISimpleFillSymbol ;

string pFeatureValue = pFeature.get_Value(pFeature.Fields.FindField("ID")).ToString();

pUniqueValueRenderer.AddValue(pFeatureValue, "烈度", (ISymbol)pSimpleFillSymbol);

}

//为每个符号设置颜色

for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++)

{

string xv = pUniqueValueRenderer.get_Value(i);

if (xv != "")

{

ISimpleFillSymbol pNextSymbol = (ISimpleFillSymbol)pUniqueValueRenderer.get_Symbol(xv);

pNextSymbol.Color = pEnumRamp.Next();

pUniqueValueRenderer.set_Symbol(xv, (ISymbol)pNextSymbol);

}

//将单值图渲染对象与渲染图层挂钩

pGeoFeatureLayer.Renderer = (IFeatureRenderer)pUniqueValueRenderer;

pGeoFeatureLayer.DisplayField = "ID";

//刷新地图和TOOCotrol

IActiveView pActiveView = axMapControl1.Map as IActiveView;

pActiveView.Refresh();

axTOCControl1.Update();

}

private void 等级图ToolStripMenuItem_Click(object sender, EventArgs e)

{

//获取当前图层，并把它设置成IGeoFeatureLayer的实例

IMap pMap = axMapControl1.Map;

ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;

IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;

IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature

IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);

IFeature pFeature = pFeatureCursor.NextFeature();

//////////////////////////////////////////////////////////////////////

//定义所需的接口对象和相关变量

IClassBreaksUIProperties pUIProperties;

object dataValues;

object dataFrequency;

//double[] cb;

int breakIndex;

long ClassesCount;

int numClass;

numClass = 10;

double[] Classes;

//////////////////////////////////////////////////////////////////////

/* We're going to retrieve frequency data from a population

field and then classify this data*/

ITable pTable;

pTable = pFeatureClass as ITable;

IBasicHistogram pBasicHist = new BasicTableHistogramClass();

ITableHistogram pTableHist;

pTableHist = (ITableHistogram)pBasicHist;

//Get values and frequencies for the population field into a table histogram object

pTableHist.Field = "AREA";

pTableHist.Table = pTable;

pBasicHist.GetHistogram(out dataValues, out dataFrequency);

IClassifyGEN pClassifyGEN = new QuantileClass();

pClassifyGEN.Classify(dataValues, dataFrequency, ref numClass);

Classes = (double[])pClassifyGEN.ClassBreaks;

ClassesCount = long.Parse(Classes.GetUpperBound(0).ToString());

//Initialise a new class breaks renderer and supply the number of class breaks and the field to perform the class breaks on.

IClassBreaksRenderer pClassBreaksRenderer = new ClassBreaksRendererClass();

pClassBreaksRenderer.Field = "AREA";

//pClassBreaksRenderer.BreakCount = ClassesCount;

pClassBreaksRenderer.MinimumBreak = Classes[0];

pClassBreaksRenderer.SortClassesAscending = true;

//设置着色对象的分级数目

pClassBreaksRenderer.BreakCount = int.Parse(ClassesCount.ToString());

//创建并设置随机色谱

IAlgorithmicColorRamp pColorRamp = new AlgorithmicColorRampClass();

pColorRamp.Algorithm = esriColorRampAlgorithm.esriCIELabAlgorithm;

IEnumColors pEnumColors;

IRgbColor pColor1 = new RgbColorClass();

IRgbColor pColor2 = new RgbColorClass();

pColor1.Red = 255;

pColor1.Green = 210;

pColor1.Blue = 210;

pColor2.Red = 190;

pColor2.Green = 0;

pColor2.Blue = 170;

pColorRamp.FromColor = pColor1;

pColorRamp.ToColor = pColor2;

pColorRamp.Size = numClass;

bool ok = true;

pColorRamp.CreateRamp(out ok);

pEnumColors = pColorRamp.Colors;

pEnumColors.Reset();// use this interface to set dialog properties

pUIProperties = pClassBreaksRenderer as IClassBreaksUIProperties;

pUIProperties.ColorRamp = "Custom";

ISimpleFillSymbol pSimpleMarkerSymbol = new SimpleFillSymbolClass();

IColor pColor;

int[] colors = new int[numClass];

// be careful, indices are different for the diff lists

for (breakIndex = 0; breakIndex < ClassesCount; breakIndex++)

{

pClassBreaksRenderer.set_Label (breakIndex,Classes[breakIndex] + " - " + Classes[breakIndex + 1]);

pUIProperties.set_LowBreak (breakIndex ,Classes[breakIndex]);

pSimpleMarkerSymbol = new SimpleFillSymbolClass();

pColor = pEnumColors.Next();

pSimpleMarkerSymbol.Color = pColor;

colors[breakIndex] = pColor.RGB;

pClassBreaksRenderer.set_Symbol(breakIndex, (ISymbol)pSimpleMarkerSymbol);

pClassBreaksRenderer.set_Break(breakIndex, Classes[breakIndex + 1]);

}

//将等级图渲染对象与渲染图层挂钩

pGeoFeatureLayer.Renderer = (IFeatureRenderer)pClassBreaksRenderer;

//刷新地图和TOOCotrol

IActiveView pActiveView = axMapControl1.Map as IActiveView;

pActiveView.Refresh();

axTOCControl1.Update();

}

private void 柱状图ToolStripMenuItem_Click(object sender, EventArgs e)

{

//获取当前图层，并把它设置成IGeoFeatureLayer的实例

IMap pMap = axMapControl1.Map;

ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;

IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;

IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature

IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

//定义柱状图渲染组建对象

IChartRenderer pChartRenderer = new ChartRendererClass();

//定义渲染字段对象并给字段对象实例化为pChartRenderer

IRendererFields pRendererFields;

pRendererFields = (IRendererFields)pChartRenderer;

//向渲染字段对象中添加字段--- 待补充自定义添加

pRendererFields.AddField("AREA", "AREA");

pRendererFields.AddField("ID", "ID");

// 通过查找features的所用字段的值，计算出数据字段的最大值，作为设置柱状图的比例大小的依据

ITable pTable;

int fieldNumber;

pTable = pGeoFeatureLayer as ITable;

// 查找出geoFeatureLayer的属性表中的字段个数

fieldNumber = pTable.FindField("AREA");

if (fieldNumber == -1)

{

MessageBox.Show("Can't find field called ", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

const int numFields = 2;// 设置bars的个数

int[] fieldIndecies = new int[2];

//long fieldIndex;

double maxValue;

bool firstValue;

//double[] fieldValue=new double[5];

double fieldValue;

fieldIndecies[0] = pTable.FindField("AREA");

fieldIndecies[1] = pTable.FindField("ID");

firstValue = true;

maxValue = 0;

int n = pFeatureClass.FeatureCount(null);

for (int i = 0; i < numFields; i++)

{

IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);

for (int j = 0; j < n; j++)

{

IFeature pFeature = pFeatureCursor.NextFeature();

fieldValue = Convert.ToDouble(pFeature.get_Value(fieldIndecies[i]));

if (firstValue)

{

//给maxValue赋初值

maxValue = fieldValue;

firstValue = false;

}

else if (fieldValue > maxValue)

{

maxValue = fieldValue;

}

if (maxValue <= 0)

{

MessageBox.Show("Failed to calculate the maximum value or maxvalue is 0.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

// 定义并设置渲染时用的chart marker symbol

IBarChartSymbol pBarChartSymbol = new BarChartSymbolClass();

pBarChartSymbol.Width = 6;

IChartSymbol pChartSymbol;

pChartSymbol = pBarChartSymbol as IChartSymbol;

IMarkerSymbol pMarkerSymbol;

pMarkerSymbol = (IMarkerSymbol)pBarChartSymbol;

IFillSymbol pFillSymbol ;

//设置pChartSymbol的最大值

pChartSymbol.MaxValue = maxValue;

// 设置bars的最大高度

pMarkerSymbol.Size = 16;

//下面给每一个bar设置符号

//定义符号数组

ISymbolArray pSymbolArray = (ISymbolArray)pBarChartSymbol;

//克隆pFillSymbol用于符号操作

//IClone pSourceClone = pFillSymbol as IClone;

//ISimpleFillSymbol pSimpleFillSymbol = pSourceClone.Clone() as ISimpleFillSymbol;

// 向符号数组中添加设置后的符号

//pSimpleFillSymbol.Color = GetRGBColor(193, 252, 179);

//pSymbolArray.AddSymbol(pSimpleFillSymbol as ISymbol);

//pSimpleFillSymbol.Color = GetRGBColor(145, 55, 200);

//pSymbolArray.AddSymbol(pSimpleFillSymbol as ISymbol);

//添加第一个符号

pFillSymbol = new SimpleFillSymbolClass();

pFillSymbol.Color = GetRGBColor(193, 252, 179) as IColor ;

pSymbolArray.AddSymbol(pFillSymbol as ISymbol) ;

//添加第二个符号

pFillSymbol = new SimpleFillSymbolClass();

pFillSymbol.Color = GetRGBColor(145, 55, 251)as IColor;

pSymbolArray.AddSymbol(pFillSymbol as ISymbol);

// 设置背景符号

//pSimpleFillSymbol.Color = GetRGBColor(239, 150, 190);

//pChartRenderer.BaseSymbol = pSimpleFillSymbol as ISymbol;

// Disable overpoaster 让符号处于图形中央

pChartRenderer.UseOverposter = false;

//pChartRenderer.ChartSymbol = pSymbolArray as IChartSymbol;

pChartRenderer.ChartSymbol = pChartSymbol as IChartSymbol;

//pChartRenderer.Label = "AREA";

pChartRenderer.CreateLegend();

//将柱状图渲染对象与渲染图层挂钩

pGeoFeatureLayer.Renderer = (IFeatureRenderer)pChartRenderer;

pGeoFeatureLayer.DisplayField = "ID";

//刷新地图和TOOCotrol

IActiveView pActiveView = axMapControl1.Map as IActiveView;

pActiveView.Refresh();

axTOCControl1.Update();

}

private void asdToolStripMenuItem_Click(object sender, EventArgs e)

{

//获取当前图层，并把它设置成IGeoFeatureLayer的实例

IMap pMap = axMapControl1.Map;

ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer;

IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;

IGeoFeatureLayer pGeoFeatureLayer = pLayer as IGeoFeatureLayer;

//获取图层上的feature

IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false);

IFeature pFeature = pFeatureCursor.NextFeature();

//////////////////////////////////////////////////////////////////////

/////////////////////////////////////////////////////////////////////////////////////////

IBasicHistogram pHistogram;

ITableHistogram pTableHistogram = new BasicTableHistogramClass();

ITable pTable;

IClassifyGEN pClassifyGEN = new EqualIntervalClass();

long ClassesCount;

IClassBreaksRenderer pClassBreaksRenderer = new ClassBreaksRendererClass();

IAlgorithmicColorRamp pAlgorithmicColorRamp = new AlgorithmicColorRampClass();

ISimpleMarkerSymbol pSimpleMarkerSymbol = new SimpleMarkerSymbolClass();

IEnumColors pEnumColors;

object dataFrequency;

object dataValue;

double[] Classes;

int numClass;

numClass = 10;

pTable = (ITable)pGeoFeatureLayer;

//根据渲染字段得到渲染信息赋值给两个数组。

pHistogram = (IBasicHistogram)pTableHistogram;

pTableHistogram.Field = "AREA";

pTableHistogram.Table = pTable;

pHistogram.GetHistogram(out dataValue, out dataFrequency);

//下面是分级方法，用于根据获得的值计算得出符合条件要求的数据

//根据条件计算出Classes和ClassesCount.

pClassifyGEN.Classify(dataValue, dataFrequency, ref numClass);

//返回一个数组，注意这个数组的下标是从1开始的

Classes = (double[])pClassifyGEN.ClassBreaks;

ClassesCount = long.Parse(Classes.GetUpperBound(0).ToString());

pClassBreaksRenderer.Field = "AREA";

//创建并设置随机色谱

IAlgorithmicColorRamp pColorRamp = new AlgorithmicColorRampClass();

pColorRamp.Algorithm = esriColorRampAlgorithm.esriCIELabAlgorithm;

IRgbColor pColor1 = new RgbColorClass();

IRgbColor pColor2 = new RgbColorClass();

pColor1.Red = 255;

pColor1.Green = 210;

pColor1.Blue = 210;

pColor2.Red = 190;

pColor2.Green = 0;

pColor2.Blue = 170;

pColorRamp.FromColor = pColor1;

pColorRamp.ToColor = pColor2;

pColorRamp.Size = 20;

bool ok = true;

pColorRamp.CreateRamp(out ok);

pEnumColors = pColorRamp.Colors;

pEnumColors.Reset();// use this interface to set dialog properties

//设置着色对象的分级数目

pClassBreaksRenderer.BreakCount = int.Parse(ClassesCount.ToString());

pClassBreaksRenderer.SortClassesAscending = true;

//设置颜色条带：

pAlgorithmicColorRamp.FromColor = pColor1;

pAlgorithmicColorRamp.ToColor = pColor2;

pAlgorithmicColorRamp.Size = numClass;

bool re = false;

pAlgorithmicColorRamp.CreateRamp(out re);

pEnumColors = pAlgorithmicColorRamp.Colors;

pEnumColors.Reset();

//定义图形边界符号

ILineSymbol pLineSymbol;

IColor pColor;

int[] colors = new int[numClass];

int breakIndex = 0;

for (breakIndex = 0; breakIndex < ClassesCount; breakIndex++)

{

//pEnumColors.Reset();

pColor = pEnumColors.Next();

pSimpleMarkerSymbol.Color = pColor;

colors[breakIndex] = pColor.RGB;

pSimpleMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare;//.esriSMSCircle;

pSimpleMarkerSymbol.Size = 10;

pClassBreaksRenderer.set_Symbol(breakIndex, (ISymbol)pSimpleMarkerSymbol);

pClassBreaksRenderer.set_Break(breakIndex, Classes[breakIndex + 1]);

pLineSymbol = new CartographicLineSymbolClass();

//pSimpleMarkerSymbol.Outline= true ;

// pEnumColors.Reset();

//pSimpleMarkerSymbol.OutlineColor = pEnumColors.Next(); ;

//pSimpleMarkerSymbol.OutlineSize = 3;

}

//colorsRGB = colors;

//将等级图渲染对象与渲染图层挂钩

pGeoFeatureLayer.Renderer = (IFeatureRenderer)pClassBreaksRenderer;

//刷新地图和TOOCotrol

IActiveView pActiveView = axMapControl1.Map as IActiveView;

pActiveView.Refresh();

axTOCControl1.Update();

}

private void 饼状图ToolStripMenuItem_Click(object sender, EventArgs e)

{

IMap pMap = new MapClass();

IFeatureLayer pFLayer = (IFeatureLayer)axMapControl1.get_Layer(0);

IGeoFeatureLayer pGeoFeaLayer = (IGeoFeatureLayer)pFLayer;

IChartRenderer pChartRenderer = new ChartRendererClass();

// Set up the field to draw charts

IRendererFields pRenderFields = (IRendererFields)pChartRenderer;

pRenderFields.AddField("PERIMETER", null);

pRenderFields.AddField("AREA", null);

IPieChartRenderer pPieChartRender = (IPieChartRenderer)pChartRenderer;

//计算最大值部分有待补充////////////////////////////////////

//Calculate the max value of the data field to scale the chart

//ICursor pCursor = new CursorClass();

IQueryFilter pQueryFilter = new QueryFilterClass();

//IRowBuffer pRow = new RowBufferClass();

ITable pTable = (ITable)pGeoFeaLayer;

pQueryFilter.AddField("PERIMETER");

ICursor pCursor = pTable.Search(pQueryFilter, true);

int fieldIndex;

double MaxValue;

bool firstValue;

double fieldValue;

fieldIndex = pTable.FindField("PERIMETER");

firstValue = true;

MaxValue = 0;

IRowBuffer pRow = pCursor.NextRow();

while (pRow != null)

{

fieldValue =(double) pRow.get_Value(fieldIndex);

if (firstValue)

{

MaxValue = fieldValue;

firstValue = false;

}

if (fieldValue > MaxValue)

{

MaxValue = fieldValue;

}

pRow = pCursor.NextRow();

}

IPieChartSymbol pPiechartSymbol = new PieChartSymbolClass();

IFillSymbol pFillSymbol = new SimpleFillSymbolClass();

IChartSymbol pChartSymbol = (IChartSymbol)pPiechartSymbol;

pPiechartSymbol.Clockwise = true;

pPiechartSymbol.UseOutline = true;

ILineSymbol pOutLine = new SimpleLineSymbolClass();

pOutLine.Color = GetRGBColor(255, 0, 255);

pOutLine.Width = 1;

pPiechartSymbol.Outline = pOutLine;

IMarkerSymbol pMarkerSymbol = (IMarkerSymbol)pPiechartSymbol;

//finally

pChartSymbol.MaxValue = MaxValue;

pMarkerSymbol.Size = 16;

//像符号数组中添加添加符号

ISymbolArray pSymbolArray = (ISymbolArray)pPiechartSymbol;

pFillSymbol.Color = GetRGBColor(213, 212, 252);

pFillSymbol.Outline = pOutLine;

pSymbolArray.AddSymbol((ISymbol)pFillSymbol);

//////////////////////////

pFillSymbol.Color = GetRGBColor(183, 242, 122);

pFillSymbol.Outline = pOutLine;

pSymbolArray.AddSymbol((ISymbol)pFillSymbol);

//set up the background

pFillSymbol.Color = GetRGBColor(239, 228, 190);

pChartRenderer.BaseSymbol = (ISymbol)pFillSymbol;

pChartRenderer.UseOverposter = false;

pPieChartRender.MinSize = 50;

pPieChartRender.MinValue = 453588;

pPieChartRender.FlanneryCompensation = false;

pPieChartRender.ProportionalBySum = true;

pChartRenderer.ChartSymbol = (IChartSymbol)pPiechartSymbol;

pChartRenderer.CreateLegend();

pGeoFeaLayer.Renderer =(IFeatureRenderer) pChartRenderer;

this.axMapControl1.Refresh();

axTOCControl1.Update();

}

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