Arcgis Engine开发分级渲染.doc

这是网上找的分级渲染代码/ / 不同颜色生成分级点符号图 / / 输入图层 / 点符号颜色字段 / 点符号分级数 / 点符号图层 public IFeatureLayer GisChart_ClassBreakColorMaker(IFeatureLayer mFeatureLayer, IServerContext pSOC, string mFieldName, ref int iBreakCount) IGeoFeatureLayer pGeoFeatureLayer; IFillSymbol pFillSymbol; ISimpleMarkerSymbol pSimpleMarkerS; stdole.StdFont pFontDisp; ITable pTable; IQueryFilter pQueryFilter; ICursor pCursor; IDataStatistics pDataStatistics; IStatisticsResults pStatisticsResult; pGeoFeatureLayer = mFeatureLayer as IGeoFeatureLayer; /计算要素最大最小值 pTable = (ITable)pGeoFeatureLayer; pQueryFilter = new QueryFilterClass(); pQueryFilter.AddField(); pCursor = pTable.Search(pQueryFilter, true); pDataStatistics = new DataStatisticsClass(); pDataStatistics.Cursor = pCursor; pDataStatistics.Field = mFieldName; pStatisticsResult = pDataStatistics.Statistics; /背景色 pFillSymbol = pSOC.CreateObject(esriDisplay.SimpleFillSymbol) as ISimpleFillSymbol; pFillSymbol.Color = GetColor(233, 255, 190,pSOC); /点符号样式 pSimpleMarkerS = pSOC.CreateObject(esriDisplay.SimpleMarkerSymbol) as ISimpleMarkerSymbol; pFontDisp = new stdole.StdFontClass(); pFontDisp.Name = ESRI Business; pFontDisp.Size = 10; pSimpleMarkerS.Outline = true; pSimpleMarkerS.OutlineColor = GetColor(0, 0, 0, pSOC); /分级符号图 /获取统计数据及起频率 ITableHistogram pTableHistogram = pSOC.CreateObject(esriCarto.BasicTableHistogram) as ITableHistogram; pTableHistogram.Field = mFieldName; pTableHistogram.Table = pTable; object dataValues, dataFrequency; IBasicHistogram pHistogram = (IBasicHistogram)pTableHistogram; pHistogram.GetHistogram(out dataValues, out dataFrequency); IClassifyGEN pClassify = new NaturalBreaksClass(); /产生种类 pClassify.Classify(dataValues, dataFrequency, ref iBreakCount); object ob = pClassify.ClassBreaks; double Classes = (double)ob; int ClassesCount = Classes.Length; /定义分类渲染 IClassBreaksRenderer pClassBreaksRenderer = (IClassBreaksRenderer)pSOC.CreateObject(esriCarto.ClassBreaksRenderer); pClassBreaksRenderer.Field = mFieldName; pClassBreaksRenderer.BreakCount = ClassesCount; pClassBreaksRenderer.SortClassesAscending = true; pClassBreaksRenderer.MinimumBreak = Classes0; IColor pColor = GetRGBColor(124, 143, 0, pSOC); /设置要素的填充颜色 for (int i = 0; i ClassesCount; i ) ISimpleFillSymbol pFillSymbol1 = new SimpleFillSymbolClass(); pSimpleMarkerS.Color = pColor; pFillSymbol1.Style = esriSimpleFillStyle.esriSFSSolid; pSimpleMarkerS.Size = 4*(i 1); pClassBreaksRenderer.BackgroundSymbol = pFillSymbol; pClassBreaksRenderer.set_Symbol(i, (ISymbol)pSimpleMarkerS); pClassBreaksRenderer.set_Break(i, Classesi); pGeoFeatureLayer.Renderer = (IFeatureRenderer)pClassBreaksRenderer; return (IFeatureLayer)pGeoFeatureLayer; private static IRgbColor GetRGBColor(int yourRed, int yourGreen, int yourBlue, IServerContext pSOC) IRgbColor pRGB = (IRgbColor)pSOC.CreateObject(esriDisplay.RgbColor); pRGB.Red = yourRed; pRGB.Green = yourGreen; pRGB.Blue = yourBlue; pRGB.UseWindowsDithering = true; return pRGB; / / 颜色设置 / / R / G / B / GIS颜色对象 private static IColor GetColor(int red, int green, int blue, IServerContext pSOC) IRgbColor rgbColor = GetRGBColor(red, green, blue, pSOC); IColor color = rgbColor as IColor; return color; 这是打开文件菜单的代码，包括打开、新建、保存、另存为、退出using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;using System.IO;using System.Runtime.InteropServices;using ESRI.ArcGIS.esriSystem;using ESRI.ArcGIS.Carto;using ESRI.ArcGIS.Controls;using ESRI.ArcGIS.ADF;using ESRI.ArcGIS.SystemUI;namespace MapControlApplication1 public sealed partial class MainForm : Form #region class private members private IMapControl3 m_mapControl = null; private string m_mapDocumentName = string.Empty; #endregion #region class constructor public MainForm() InitializeComponent(); #endregion private void MainForm_Load(object sender, EventArgs e) /get the MapControl m_mapControl = (IMapControl3)axMapControl1.Object; /disable the Save menu (since there is no document yet) menuSaveDoc.Enabled = false; #region Main Menu event handlers private void menuNewDoc_Click(object sender, EventArgs e) /execute New Document command ICommand command = new CreateNewDocument(); command.OnCreate(m_mapControl.Object); command.OnClick(); private void menuOpenDoc_Click(object sender, EventArgs e) /execute Open Document command ICommand command = new ControlsOpenDocCommandClass(); command.OnCreate(m_mapControl.Object); command.OnClick(); private void menuSaveDoc_Click(object sender, EventArgs e) /execute Save Document command if (m_mapControl.CheckMxFile(m_mapDocumentName) /create a new instance of a MapDocument IMapDocument mapDoc = new MapDocumentClass(); mapDoc.Open(m_mapDocumentName, string.Empty); /Make sure that the MapDocument is not readonly if (mapDoc.get_IsReadOnly(m_mapDocumentName) MessageBox.Show(Map document is read only!); mapDoc.Close(); return; /Replace its contents with the current map mapDoc.ReplaceContents(IMxdContents)m_mapControl.Map); /save the MapDocument in order to persist it mapDoc.Save(mapDoc.UsesRelativePaths, false); /close the MapDocument mapDoc.Close(); private void menuSaveAs_Click(object sender, EventArgs e) /execute SaveAs Document command ICommand command = new ControlsSaveAsDocCommandClass(); command.OnCreate(m_mapControl.Object); command.OnClick(); private void menuExitApp_Click(object sender, EventArgs e) /exit the application Application.Exit(); #endregion /listen to MapReplaced evant in order to update the statusbar and the Save menu private void axMapControl1_OnMapReplaced(object sender, IMapControlEvents2_OnMapReplacedEvent e) /get the current document name