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BarRender.cs
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BarRender.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.GlobeCore;
using ESRI.ArcGIS.DataSourcesFile;
namespace EngineApplication
{
class BarRender
{
public BarRender(AxMapControl pMapcontrol, IFeatureLayer pFtLayer, String pFieldName1, string pFieldName2)
{
//IGeoFeatureLayer pGeoFeatureLayer = pFtLayer as IGeoFeatureLayer;
//IFeatureClass pFeatureClass = pFtLayer.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(pFieldName1, pFieldName1);
//pRendererFields.AddField(pFieldName2, pFieldName2);
//ITable pTable;
//pTable = pGeoFeatureLayer as ITable;
//int[] pFieldIndecies = new int[2];
//pFieldIndecies[0] = pTable.FindField(pFieldName1);
//pFieldIndecies[1] = pTable.FindField(pFieldName2);
//IDataStatistics pDataStat = new DataStatisticsClass();
//IFeatureCursor pFtCursor = pFtLayer.FeatureClass.Search(null, false);
//pDataStat.Cursor = pFtCursor as ICursor;
//pDataStat.Field = pFieldName2;
//double pMax = pDataStat.Statistics.Maximum;
//// 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 = pMax;
//// 设置bars的最大高度
//pMarkerSymbol.Size = 80;
////下面给每一个bar设置符号
////定义符号数组
//ISymbolArray pSymbolArray = (ISymbolArray)pBarChartSymbol;
////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);
//pChartRenderer.ChartSymbol = pChartSymbol as IChartSymbol;
////pChartRenderer.Label = "AREA";
//pChartRenderer.CreateLegend();
//pChartRenderer.UseOverposter = false;
////将柱状图渲染对象与渲染图层挂钩
//pGeoFeatureLayer.Renderer = (IFeatureRenderer)pChartRenderer;
////刷新地图和TOOCotrol
//IActiveView pActiveView = pMapcontrol .ActiveView as IActiveView;
//pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
//获取当前图层 ,并把它设置成IGeoFeatureLayer的实例
IMap pMap = pMapcontrol.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(pFieldName1, pFieldName1);
pRendererFields.AddField(pFieldName2, pFieldName2);
// 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(pFieldName1);
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(pFieldName1);
fieldIndecies[1] = pTable.FindField(pFieldName2);
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 = pFieldName1;
//刷新地图和TOOCotrol
IActiveView pActiveView = pMapcontrol.Map as IActiveView;
pActiveView.Refresh();
}
public IRgbColor GetRGBColor(int r, int g, int b)
{
IRgbColor pRGB;
pRGB = new RgbColorClass();
pRGB.Red = r;
pRGB.Green = g;
pRGB.Blue = b;
return pRGB;
}
}
}