ArcGIS Engine渲染

AE之分级颜色专题图渲染  

 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] + "\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);

                }

 

               

            }

            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();

 

 

        }

 

from:  http://blog.sina.com.cn/s/blog_90b91bf101015jkj.html

http://blog.sina.com.cn/s/blog_642c66ed0101cs5m.html