参考代码1
private void 分级渲染ToolStripMenuItem_Click(object sender, EventArgs e)
{
//值分级
IBasicHistogram pBasicHis = new BasicTableHistogramClass();
ITableHistogram pTabHis = (ITableHistogram)pBasicHis;
pTabHis.Field = "w1";
ITable pTab = (ITable)axMapControl1.get_Layer(0);
pTabHis.Table = pTab;
object doubleArrVal, longArrFreq;
pBasicHis.GetHistogram(out doubleArrVal, out longArrFreq);
IClassifyGEN pClassify = new EqualIntervalClass(); //NaturalBreaksClass
int nDes = 5;
pClassify.Classify(doubleArrVal, longArrFreq, ref nDes);
object classes = pClassify.ClassBreaks;
System.Array pArr = (System.Array)classes;
//算法梯度颜色
IAlgorithmicColorRamp pAlgoColorRamp = new AlgorithmicColorRampClass();
pAlgoColorRamp.Size = pArr.Length;
IRgbColor pFromColor = new RgbColorClass(), pToColor = new RgbColorClass();
pFromColor.Red = 0;
pFromColor.Green = 255;
pFromColor.Blue = 0;
pToColor.Red = 255;
pToColor.Green = 0;
pToColor.Blue = 255;
pAlgoColorRamp.FromColor = pFromColor;
pAlgoColorRamp.ToColor = pToColor;
bool ok = true;
pAlgoColorRamp.CreateRamp(out ok);
//颜色梯度结束
IClassBreaksRenderer pRender = new ClassBreaksRendererClass();
pRender.BreakCount = pArr.Length;
pRender.Field = "w1";
ISimpleFillSymbol pSym;
for (int i = 0; i < pArr.Length; i++)
{
pRender.set_Break(i, (double)pArr.GetValue(i));
pSym = new SimpleFillSymbolClass();
pSym.Color = pAlgoColorRamp.get_Color(i);
pRender.set_Symbol(i, (ISymbol)pSym);
}
IGeoFeatureLayer pGeoLyr = (IGeoFeatureLayer)axMapControl1.get_Layer(0);
pGeoLyr.Renderer = (IFeatureRenderer)pRender;
axMapControl1.Refresh();
axTOCControl1.Update();
}
参考代码2
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 = "w1";
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] + "
";
}
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);
}
}
IActiveView pActiveView = axMapControl1.Map as IActiveView;
pActiveView.Refresh();
axTOCControl1.Update();
}
参考代码3
private void 等级专题图ToolStripMenuItem_Click(object sender, EventArgs e) { // 获取当前图层，并把它设置成IGeoFeatureLayer的实例 ILayer pLayer = axMapControl1.get_Layer(0); IFeatureLayer pFeatLayer = (IFeatureLayer)pLayer; IGeoFeatureLayer pGeoFeatLayer = (IGeoFeatureLayer)pLayer; IFeatureClass pFeatClass = pFeatLayer.FeatureClass; // We're going to retrieve frequency data from a population // field and then clasify this data ITable pTable = (ITable)pFeatClass; IBasicHistogram pBasicHistogram = new BasicTableHistogramClass(); ITableHistogram pTableHistogram = (ITableHistogram)pBasicHistogram; // Get values and frequencies for the population field into a table histogram object string fieldName = "w1"; pTableHistogram.Field = fieldName; pTableHistogram.Table = pTable; object dataValues; object dataFrequency; pBasicHistogram.GetHistogram(out dataValues, out dataFrequency); IClassifyGEN pClassifyGEN = new QuantileClass(); int numClass = 3; pClassifyGEN.Classify(dataValues, dataFrequency, ref numClass); double[] classes = (double[])pClassifyGEN.ClassBreaks; long classesCount = long.Parse(classes.GetUpperBound(0).ToString()); // Initialize 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 = fieldName; 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 pAlgorithmicColorRamp = new AlgorithmicColorRampClass(); pAlgorithmicColorRamp.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; pAlgorithmicColorRamp.FromColor = pColor1; pAlgorithmicColorRamp.ToColor = pColor2; pAlgorithmicColorRamp.Size = numClass; bool ok = true; pAlgorithmicColorRamp.CreateRamp(out ok); pEnumColors = pAlgorithmicColorRamp.Colors; pEnumColors.Reset(); IClassBreaksUIProperties pUIProperties = (IClassBreaksUIProperties)pClassBreaksRenderer; pUIProperties.ColorRamp = "Custom"; ISimpleFillSymbol pSimpleMarkerSymbol = new SimpleFillSymbolClass(); IColor pColor; int[] colors = new int[numClass]; // be careful, indices are different for the different lists for (int breakIndex = 0; breakIndex < classesCount; breakIndex++) { pClassBreaksRenderer.set_Label(breakIndex, classes[breakIndex] + "-" + classes[breakIndex + 1]); pUIProperties.set_LowBreak(breakIndex, classes[breakIndex]); ISimpleFillSymbol pFillSymbol = new SimpleFillSymbolClass(); pColor = pEnumColors.Next(); pFillSymbol.Color = pColor; colors[breakIndex] = pColor.RGB; pClassBreaksRenderer.set_Symbol(breakIndex, (ISymbol)pFillSymbol); pClassBreaksRenderer.set_Break(breakIndex, classes[breakIndex + 1]); } // 将等级图渲染对象与渲染图层挂钩 pGeoFeatLayer.Renderer = (IFeatureRenderer)pClassBreaksRenderer; axMapControl1.ActiveView.Refresh(); axTOCControl1.Update(); }
参考代码4
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; ////////////////////////////////////////////////////////////////////// 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 = "w1"; 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 = "w1"; //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); 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(); }