/// <summary>
/// Pie Chart Render
/// </summary>
/// <param name="currentLayer"></param>
/// <param name="breakCount"></param>
/// <author>Shen Yongyuan</author>
/// <date>20091114</date>
public static void PieChartRender(ILayer currentLayer)
{
//Scale Symbol
IGeoFeatureLayer pGeoFeatureL = currentLayer as IGeoFeatureLayer;
pGeoFeatureL.ScaleSymbols = true;
//Chart Render
IChartRenderer pChartRenderer = new ChartRendererClass();
IRendererFields pRendererFields = (IRendererFields)pChartRenderer;
pRendererFields.AddField(Town.Constant.Constant.TmpTableIndex + "." + "Ecology", "生态");
pRendererFields.AddField(Town.Constant.Constant.TmpTableIndex + "." + "Social", "社会");
pRendererFields.AddField(Town.Constant.Constant.TmpTableIndex + "." + "Economic", "经济");
//Search Max
IQueryFilter pQueryFilter = new QueryFilterClass();
pQueryFilter.AddField(Town.Constant.Constant.TmpTableIndex + "." + "Ecology");
pQueryFilter.AddField(Town.Constant.Constant.TmpTableIndex + "." + "Social");
pQueryFilter.AddField(Town.Constant.Constant.TmpTableIndex + "." + "Economic");
IFeatureCursor pCursor = pGeoFeatureL.DisplayFeatureClass.Search(pQueryFilter, true);
int fldFiledEcology = pCursor.Fields.FindField(Town.Constant.Constant.TmpTableIndex + "." + "Ecology");
int fldFiledSocial = pCursor.Fields.FindField(Town.Constant.Constant.TmpTableIndex + "." + "Social");
int fldFiledEconomic = pCursor.Fields.FindField(Town.Constant.Constant.TmpTableIndex + "." + "Economic");
List <double> valueList = new List <double>();
IFeature pFeature = pCursor.NextFeature();
while (pFeature != null)
{
valueList.Add(Convert.ToDouble(pFeature.get_Value(fldFiledEcology)));
valueList.Add(Convert.ToDouble(pFeature.get_Value(fldFiledSocial)));
valueList.Add(Convert.ToDouble(pFeature.get_Value(fldFiledEconomic)));
pFeature = pCursor.NextFeature();
}
//Pie Chart
IPieChartSymbol pPieChartSymbol;
pPieChartSymbol = new PieChartSymbolClass();
IChartSymbol pChartSymbol = (IChartSymbol)pPieChartSymbol;
//Pie Chart Attribute
pPieChartSymbol.Clockwise = true;
pPieChartSymbol.UseOutline = true;
ILineSymbol pOutline;
pOutline = new SimpleLineSymbolClass();
pOutline.Color = ArcGIS.Color.ToEsriColor(System.Drawing.Color.FromArgb(100, 205, 30));
pOutline.Width = 1;
pPieChartSymbol.Outline = pOutline;
IMarkerSymbol pMarkerSymbol = (IMarkerSymbol)pPieChartSymbol;
pChartSymbol.MaxValue = valueList.Max();
pMarkerSymbol.Size = 60;
//Symbol Array
ISymbolArray pSymbolArray = (ISymbolArray)pPieChartSymbol;
ISimpleFillSymbol pFillSymbol = new SimpleFillSymbolClass();
pFillSymbol.Color = ArcGIS.Color.ToEsriColor(System.Drawing.Color.Green);
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
pFillSymbol = new SimpleFillSymbolClass();
pFillSymbol.Color = ArcGIS.Color.ToEsriColor(System.Drawing.Color.Red);
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
pFillSymbol = new SimpleFillSymbolClass();
pFillSymbol.Color = ArcGIS.Color.ToEsriColor(System.Drawing.Color.Blue);
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
pChartRenderer.ChartSymbol = (IChartSymbol)pPieChartSymbol;
pChartRenderer.Label = "指标";
//Back Ground
pFillSymbol = new SimpleFillSymbolClass();
pFillSymbol.Color = ArcGIS.Color.ToEsriColor(System.Drawing.Color.FromArgb(239, 228, 190));
pChartRenderer.BaseSymbol = (ISymbol)pFillSymbol;
//Render Label
pGeoFeatureL.Renderer = pChartRenderer as IFeatureRenderer;
}
//PieChartRenderer圆形分格统计图
private void button7_Click(object sender, EventArgs e)
{
IGeoFeatureLayer geoFeatureLayer;
IFeatureLayer featureLayer;
ITable table;
ICursor cursor;
IRowBuffer rowBuffer;
//设置饼图的要素
string field1 = "sqmi";
string field2 = "sqkm";
//获取渲染图层
geoFeatureLayer = getGeoLayer("Continents");
featureLayer = geoFeatureLayer as IFeatureLayer;
table = featureLayer as ITable;
geoFeatureLayer.ScaleSymbols = true;
IChartRenderer chartRenderer = new ChartRendererClass();
IPieChartRenderer pieChartRenderer = chartRenderer as IPieChartRenderer;
IRendererFields rendererFields = chartRenderer as IRendererFields;
rendererFields.AddField(field1, field1);
rendererFields.AddField(field2, field2);
int[] fieldIndexs = new int[2];
fieldIndexs[0] = table.FindField(field1);
fieldIndexs[1] = table.FindField(field2);
//获取渲染要素的最大值
double fieldValue = 0.0, maxValue = 0.0;
cursor = table.Search(null, true);
rowBuffer = cursor.NextRow();
while (rowBuffer != null)
{
for (int i = 0; i < 2; i++)
{
fieldValue = double.Parse(rowBuffer.get_Value(fieldIndexs[i]).ToString());
if (fieldValue > maxValue)
{
maxValue = fieldValue;
}
}
rowBuffer = cursor.NextRow();
}
//设置饼图符号
IPieChartSymbol pieChartSymbol = new PieChartSymbolClass();
pieChartSymbol.Clockwise = true;
pieChartSymbol.UseOutline = true;
IChartSymbol chartSymbol = pieChartSymbol as IChartSymbol;
chartSymbol.MaxValue = maxValue;
ILineSymbol lineSymbol = new SimpleLineSymbolClass();
lineSymbol.Color = getRGB(255, 0, 0);
lineSymbol.Width = 2;
pieChartSymbol.Outline = lineSymbol;
IMarkerSymbol markerSymbol = pieChartSymbol as IMarkerSymbol;
markerSymbol.Size = 30;
//添加渲染符号
ISymbolArray symbolArray = pieChartSymbol as ISymbolArray;
IFillSymbol fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(0, 255, 0);
symbolArray.AddSymbol(fillSymbol as ISymbol);
fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(0, 0, 255);
symbolArray.AddSymbol(fillSymbol as ISymbol);
chartRenderer.ChartSymbol = pieChartSymbol as IChartSymbol;
fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(100, 100, 100);
chartRenderer.BaseSymbol = fillSymbol as ISymbol;
chartRenderer.UseOverposter = false;
//创建图例
chartRenderer.CreateLegend();
geoFeatureLayer.Renderer = chartRenderer as IFeatureRenderer;
this.axMapControl1.Refresh();
}
public PieRender(AxMapControl pMapcontrol, IFeatureLayer pFtLayer, string pFieldName1, string pFieldName2)
{
IGeoFeatureLayer pGeoFeaLayer = (IGeoFeatureLayer)pFtLayer;
IChartRenderer pChartRenderer = new ChartRendererClass();
// Set up the field to draw charts
IRendererFields pRenderFields = (IRendererFields)pChartRenderer;
pRenderFields.AddField(pFieldName1, pFieldName1);
pRenderFields.AddField(pFieldName2, pFieldName2);
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(pFieldName1);
ICursor pCursor = pTable.Search(pQueryFilter, true);
IDataStatistics pDataStat = new DataStatisticsClass();
IFeatureCursor pFtCursor = pFtLayer.FeatureClass.Search(null, false);
pDataStat.Cursor = pFtCursor as ICursor;
pDataStat.Field = pFieldName1;
double pMax = pDataStat.Statistics.Maximum;
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 = pMax;
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 = 1;
pPieChartRender.MinValue = pDataStat.Statistics.Minimum;
pPieChartRender.FlanneryCompensation = false;
pPieChartRender.ProportionalBySum = true;
pChartRenderer.ChartSymbol = (IChartSymbol)pPiechartSymbol;
pChartRenderer.CreateLegend();
pGeoFeaLayer.Renderer = (IFeatureRenderer)pChartRenderer;
pMapcontrol.ActiveView.Refresh();
}
public PieRender(AxMapControl pMapcontrol, IFeatureLayer pFtLayer, string pFieldName1, string pFieldName2)
{
IGeoFeatureLayer pGeoFeaLayer = (IGeoFeatureLayer)pFtLayer;
IChartRenderer pChartRenderer = new ChartRendererClass();
// Set up the field to draw charts
IRendererFields pRenderFields = (IRendererFields)pChartRenderer;
pRenderFields.AddField(pFieldName1, pFieldName1);
pRenderFields.AddField(pFieldName2, pFieldName2);
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(pFieldName1);
ICursor pCursor = pTable.Search(pQueryFilter, true);
IDataStatistics pDataStat = new DataStatisticsClass();
IFeatureCursor pFtCursor = pFtLayer.FeatureClass.Search(null, false);
pDataStat.Cursor = pFtCursor as ICursor;
pDataStat.Field = pFieldName1;
double pMax = pDataStat.Statistics.Maximum;
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 = pMax;
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 = 1;
pPieChartRender.MinValue = pDataStat.Statistics.Minimum;
pPieChartRender.FlanneryCompensation = false;
pPieChartRender.ProportionalBySum = true;
pChartRenderer.ChartSymbol = (IChartSymbol)pPiechartSymbol;
pChartRenderer.CreateLegend();
pGeoFeaLayer.Renderer = (IFeatureRenderer)pChartRenderer;
pMapcontrol.ActiveView.Refresh();
}
private void btnPieChartRender_Click(object sender, EventArgs e)
{
IGeoFeatureLayer pGeoFeatLyr = this.mainMapControl.get_Layer(0) as IGeoFeatureLayer;
//找出两个用于着色字段的最大值的最大值(这次加上最小值之和,这个函数的尾后部分用到,用于在着色对象里确定最小的PieChartSymbol的大小)
double p1, p2, max, m1, m2, min;
ICursor pCursor = pGeoFeatLyr.Search(null, true) as ICursor;
IDataStatistics pDataStatistics = new DataStatisticsClass();
pDataStatistics.Cursor = pCursor;
pDataStatistics.Field = "GDP_1994（";
p1 = pDataStatistics.Statistics.Maximum;
m1 = pDataStatistics.Statistics.Minimum;
pCursor = pGeoFeatLyr.Search(null, true) as ICursor;
pDataStatistics.Cursor = pCursor;
pDataStatistics.Field = "GDP_1999（";
p2 = pDataStatistics.Statistics.Maximum;
m2 = pDataStatistics.Statistics.Minimum;
max = p1 > p2 ? p1 : p2;
min = m1 + m2;//最小值之和
//以下生成好三个SimpleFillSymbol,留作后用
ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbolClass();
pSimpleFillSymbol.Color = getRGBColor(255, 0, 0);
pSimpleFillSymbol.Outline = null;
ISimpleFillSymbol pSimpleFillSymbol2 = new SimpleFillSymbolClass();
pSimpleFillSymbol2.Color = getRGBColor(0, 0, 255);
pSimpleFillSymbol2.Outline = null;
ISimpleFillSymbol pSimpleFillSymbol3 = new SimpleFillSymbolClass();
pSimpleFillSymbol3.Color = getRGBColor(0, 255, 0);
//以下创建并设置PieChartSymbol对象,并设置PieChartSymbol对象的各个SimpleFillSymbol
IPieChartSymbol pPieChartSymbol = new PieChartSymbolClass();
pPieChartSymbol.Clockwise = true;
pPieChartSymbol.UseOutline = false;
IChartSymbol pChartSymbol = pPieChartSymbol as IChartSymbol;
pChartSymbol.MaxValue = max;
ISymbolArray pSymbolArray = pPieChartSymbol as ISymbolArray;
pSymbolArray.AddSymbol((ISymbol)pSimpleFillSymbol);
pSymbolArray.AddSymbol((ISymbol)pSimpleFillSymbol2);
IMarkerSymbol pMarkerSymbol = pPieChartSymbol as IMarkerSymbol;
pMarkerSymbol.Size = 5;//PieChartSymbol的大小(我觉得是饼的厚度)
//以下创建并设置着色对象
IChartRenderer pChartRenderer = new ChartRendererClass();
pChartRenderer.BaseSymbol = pSimpleFillSymbol3 as ISymbol;
pChartRenderer.ChartSymbol = pChartSymbol;
pChartRenderer.UseOverposter = true;
pChartRenderer.Label = "GDP";
IPieChartRenderer pPieChartRenderer = pChartRenderer as IPieChartRenderer;
pPieChartRenderer.MinSize = 0.5;//最小的尺码关键
pPieChartRenderer.MinValue = 1;//最小尺码的值,为什么0不可以??????????????关键
pPieChartRenderer.ProportionalBySum = true;//PieChartSymbol的大小按照字段和成比例,关键
//若PieChartSymbol的大小只按一个字段,则须设置.ProportionalField为该字段
IRendererFields pRenderFields = pChartRenderer as IRendererFields;//添加用于着色的字段
pRenderFields.AddField("GDP_1994（", "GDP_1994（");
pRenderFields.AddField("GDP_1999（", "GDP_1999（");
pChartRenderer.CreateLegend();//生成图例
pGeoFeatLyr.Renderer = pChartRenderer as IFeatureRenderer;
this.mainMapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
this.axTOCControl.Update();
}
//PieChartRenderer
private void button7_Click(object sender, EventArgs e)
{
IGeoFeatureLayer geoFeatureLayer;
IFeatureLayer featureLayer;
ITable table;
ICursor cursor;
IRowBuffer rowBuffer;
//设置饼图的要素
string field1 = "sqmi";
string field2 = "sqkm";
//获取渲染图层
geoFeatureLayer = getGeoLayer("Continents");
featureLayer = geoFeatureLayer as IFeatureLayer;
table = featureLayer as ITable;
geoFeatureLayer.ScaleSymbols = true;
IChartRenderer chartRenderer = new ChartRendererClass();
IPieChartRenderer pieChartRenderer = chartRenderer as IPieChartRenderer;
IRendererFields rendererFields = chartRenderer as IRendererFields;
rendererFields.AddField(field1, field1);
rendererFields.AddField(field2, field2);
int[] fieldIndexs = new int[2];
fieldIndexs[0] = table.FindField(field1);
fieldIndexs[1] = table.FindField(field2);
//获取渲染要素的最大值
double fieldValue = 0.0, maxValue = 0.0;
cursor = table.Search(null, true);
rowBuffer = cursor.NextRow();
while (rowBuffer != null)
{
for (int i = 0; i < 2; i++)
{
fieldValue = double.Parse(rowBuffer.get_Value(fieldIndexs[i]).ToString());
if (fieldValue > maxValue)
{
maxValue = fieldValue;
}
}
rowBuffer = cursor.NextRow();
}
//设置饼图符号
IPieChartSymbol pieChartSymbol = new PieChartSymbolClass();
pieChartSymbol.Clockwise = true;
pieChartSymbol.UseOutline = true;
IChartSymbol chartSymbol = pieChartSymbol as IChartSymbol;
chartSymbol.MaxValue = maxValue;
ILineSymbol lineSymbol = new SimpleLineSymbolClass();
lineSymbol.Color = getRGB(255, 0, 0);
lineSymbol.Width = 2;
pieChartSymbol.Outline = lineSymbol;
IMarkerSymbol markerSymbol = pieChartSymbol as IMarkerSymbol;
markerSymbol.Size = 30;
//添加渲染符号
ISymbolArray symbolArray = pieChartSymbol as ISymbolArray;
IFillSymbol fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(0, 255, 0);
symbolArray.AddSymbol(fillSymbol as ISymbol);
fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(0, 0, 255);
symbolArray.AddSymbol(fillSymbol as ISymbol);
chartRenderer.ChartSymbol = pieChartSymbol as IChartSymbol;
fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(100, 100, 100);
chartRenderer.BaseSymbol = fillSymbol as ISymbol;
chartRenderer.UseOverposter = false;
//创建图例
chartRenderer.CreateLegend();
geoFeatureLayer.Renderer = chartRenderer as IFeatureRenderer;
this.axMapControl1.Refresh();
}
private void method_4()
{
if (this.igeoFeatureLayer_0 == null)
{
this.ichartRenderer_0 = null;
}
else
{
IChartRenderer pInObject = this.igeoFeatureLayer_0.Renderer as IChartRenderer;
if (pInObject == null)
{
if (this.ichartRenderer_0 == null)
{
this.ichartRenderer_0 = new ChartRendererClass();
if (this.int_0 == 0)
{
this.ichartRenderer_0.ChartSymbol = new PieChartSymbolClass();
}
else if (this.int_0 == 1)
{
this.ichartRenderer_0.ChartSymbol = new BarChartSymbolClass();
}
else
{
this.ichartRenderer_0.ChartSymbol = new StackedChartSymbolClass();
}
(this.ichartRenderer_0.ChartSymbol as IMarkerSymbol).Size = 32.0;
}
}
else
{
IObjectCopy copy = new ObjectCopyClass();
this.ichartRenderer_0 = copy.Copy(pInObject) as IChartRenderer;
IChartSymbol chartSymbol = this.ichartRenderer_0.ChartSymbol;
IChartSymbol symbol2 = null;
if (this.int_0 == 0)
{
if (!(chartSymbol is IPieChartSymbol))
{
symbol2 = new PieChartSymbolClass();
}
}
else if (this.int_0 == 1)
{
if (!(chartSymbol is IBarChartSymbol))
{
symbol2 = new BarChartSymbolClass();
}
}
else if ((this.int_0 == 2) && !(chartSymbol is IStackedChartSymbol))
{
symbol2 = new StackedChartSymbolClass();
}
if (symbol2 != null)
{
ISymbolArray array = chartSymbol as ISymbolArray;
for (int i = 0; i < array.SymbolCount; i++)
{
(symbol2 as ISymbolArray).AddSymbol(array.get_Symbol(i));
}
this.ichartRenderer_0.ChartSymbol = symbol2;
}
}
}
}
private void btn_OK_Click(object sender, EventArgs e)
{
string LayerName = cbx_Layer.SelectedItem.ToString();
IGeoFeatureLayer pGeoFeatureLayer = (IGeoFeatureLayer)m_FeatureLayer;
ITable pTable = (ITable)pGeoFeatureLayer;
ICursor pCursor = pTable.Search(null, true);
int numFields = lstbx_RightFields.Items.Count;
string[] fildName = new string[numFields];
int[] fieldIndecies = new int[numFields];
for (int i = 0; i < numFields; i++)
{
if (lstbx_RightFields.Items[i].ToString() != "None")
{
fildName[i] = lstbx_RightFields.Items[i].ToString();
fieldIndecies[i] = pTable.FindField(fildName[i]);
}
else
{
MessageBox.Show("不可用的字段,请选择其它图层");
return;
}
}
//fieldIndecies[0] = pTable.FindField(strPopField1);
//fieldIndecies[1] = pTable.FindField(strPopField2);
bool firstValue = true;
double dmaxValue = 0.0;
//Iterate across each feature
IRowBuffer pRowBuffer = pCursor.NextRow();
double dfieldValue;
while (pRowBuffer != null)
{
// iterate through each data field and update the maxVal if needed
for (int lfieldIndex = 0; lfieldIndex <= numFields - 1; lfieldIndex++)
{
dfieldValue = (double)pRowBuffer.get_Value(fieldIndecies[lfieldIndex]);
if (firstValue)
{
// Special case for the first value in a feature class
dmaxValue = dfieldValue;
firstValue = false;
}
else
{
if (dfieldValue > dmaxValue)
{
// we've got a new biggest value
dmaxValue = dfieldValue;
}
}
}
pRowBuffer = pCursor.NextRow();
}
if (dmaxValue <= 0)
{
MessageBox.Show("Failed to gather stats on the feature class");
return;
}
IChartRenderer pChartRenderer = new ChartRendererClass();
//Set up the fields to draw charts of
IRendererFields pRendererFields = (IRendererFields)pChartRenderer;
for (int i = 0; i < numFields; i++)
{
pRendererFields.AddField(fildName[i], fildName[i]);
}
// Set up the chart marker symbol to use with the renderer
IPieChartSymbol pPieChartSymbol;
pPieChartSymbol = new PieChartSymbolClass();
//饼图使用顺时针方法
pPieChartSymbol.Clockwise = true;
//饼图有外轮廓线
pPieChartSymbol.UseOutline = true;
IChartSymbol pChartSymbol = (IChartSymbol)pPieChartSymbol;
pChartSymbol.MaxValue = dmaxValue;
ILineSymbol pOutline;
pOutline = new SimpleLineSymbolClass();
pOutline.Color = getRGB(213, 212, 252);
pOutline.Width = 1;
//设置外轮廓线的样式
pPieChartSymbol.Outline = pOutline;
IMarkerSymbol pMarkerSymbol = (IMarkerSymbol)pPieChartSymbol;
pMarkerSymbol.Size = 8;
IColorRamp pColorRamp = (IColorRamp)m_StyleGallertItem.Item;
pColorRamp.Size = pTable.RowCount(null);
bool ok = true;
pColorRamp.CreateRamp(out ok);
IEnumColors pEnumRamp = pColorRamp.Colors;
IFillSymbol pFillSymbol;
ISymbolArray pSymbolArray = (ISymbolArray)pPieChartSymbol;
for (int i = 0; i < numFields; i++)
{
pFillSymbol = new SimpleFillSymbolClass();
for (int j = 0; j < 8; j++)
{
pEnumRamp.Next();
}
pFillSymbol.Color = pEnumRamp.Next();
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
}
//Now set the barchart symbol into the renderer
pChartRenderer.ChartSymbol = (IChartSymbol)pPieChartSymbol;
// pChartRenderer.Label = "Population";
//set up the background symbol to use tan color
pFillSymbol = new SimpleFillSymbolClass();
pFillSymbol.Color = m_BackGroundColor;
pChartRenderer.BaseSymbol = (ISymbol)pFillSymbol;
pChartRenderer.UseOverposter = false;
IPieChartRenderer pPieChartRenderer = pChartRenderer as IPieChartRenderer;
pPieChartRenderer.MinSize = 3;
//设置最小值，用于尺寸比例
pPieChartRenderer.MinValue = 453588;
pPieChartRenderer.FlanneryCompensation = false;
pPieChartRenderer.ProportionalBySum = true;
//pChartRenderer.Label = "Population";
//产生图例对象
pChartRenderer.CreateLegend();
//pdate the renderer and refresh the screen
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pChartRenderer;
m_MapControl.ActiveView.ContentsChanged();
m_MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
}
