AE要素闪烁的两种方法

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 using ESRI.ArcGIS.Carto;
 10 using ESRI.ArcGIS.Geodatabase;
 11 using ESRI.ArcGIS.Geometry;
 12 using ESRI.ArcGIS.Display;
 13 
 14 namespace Test_FieldsQuery
 15 {
 16     public partial class Form1 : Form
 17     {
 18         public Form1()
 19         {
 20             InitializeComponent();
 21         }
 22 
 23         private void Form1_Load(object sender, EventArgs e)
 24         {
 25             axMapControl1.LoadMxFile("数据\Asia.mxd");
 26         }
 27 
 28         private void button1_Click(object sender, EventArgs e)
 29         {
 30             ILayer pLayer = axMapControl1.get_Layer(0);
 31             IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;
 32             IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
 33 
 34             IQueryFilter pQueryFilter = new QueryFilterClass();
 35             pQueryFilter.WhereClause = "POPULATION > 5000000";
 36 
 37             IFeatureCursor pFeatureCursor = pFeatureClass.Search(pQueryFilter, false);
 38             IFeature pFeature = pFeatureCursor.NextFeature();
 39             while (pFeature != null)
 40             {
 41                 //第一种方法
 42                 this.axMapControl1.FlashShape(pFeature.Shape, 2, 1000,CreateSimpleSymbol(pFeature.Shape.GeometryType));
 43                 //或者
 44                 this.axMapControl1.FlashShape(pFeature.Shape, 2, 1000,Type.Missing);
 45                 //第二种方法
 46                 //FlashGeometry(pFeature.Shape, 3, 300);
 47                 pFeature = pFeatureCursor.NextFeature();
 48             }
 49         }
 50 
 51         /// <summary>
 52         /// 闪烁指定要素IGeometry
 53         /// </summary>
 54         /// <param name="geometry">要素</param>
 55         /// <param name="flashCount">闪烁次数</param>
 56         /// <param name="interval">每次闪烁的时间</param>
 57         private void FlashGeometry(IGeometry geometry, int flashCount, int interval)
 58         {
 59             IScreenDisplay display = axMapControl1.ActiveView.ScreenDisplay;
 60             ISymbol symbol = CreateSimpleSymbol(geometry.GeometryType);
 61             display.StartDrawing(0, (short)esriScreenCache.esriNoScreenCache); display.SetSymbol(symbol);
 62             for (int i = 0; i < flashCount; i++)
 63             {
 64                 switch (geometry.GeometryType)
 65                 {
 66                     case esriGeometryType.esriGeometryPoint:
 67                         display.DrawPoint(geometry);
 68                         break;
 69                     case esriGeometryType.esriGeometryMultipoint:
 70                         display.DrawMultipoint(geometry);
 71                         break;
 72                     case esriGeometryType.esriGeometryPolyline:
 73                         display.DrawPolyline(geometry);
 74                         break;
 75                     case esriGeometryType.esriGeometryPolygon:
 76                         display.DrawPolygon(geometry);
 77                         break;
 78                 }
 79                 System.Threading.Thread.Sleep(interval);
 80             }
 81             display.FinishDrawing();
 82         }
 83         /// <summary>
 84         /// 根据几何类型创建闪烁符号
 85         /// </summary>
 86         /// <param name="geometryType">要素几何类型</param>
 87         /// <returns>ISymbol</returns>
 88         private ISymbol CreateSimpleSymbol(esriGeometryType geometryType)
 89         {
 90             ISymbol symbol = null;
 91             switch (geometryType)
 92             {
 93                 case esriGeometryType.esriGeometryPoint:
 94                 case esriGeometryType.esriGeometryMultipoint:
 95                     ISimpleMarkerSymbol markerSymbol = new SimpleMarkerSymbolClass();
 96                     markerSymbol.Color = getRGB(0, 0, 255);
 97                     markerSymbol.Size = 10;
 98                     symbol = markerSymbol as ISymbol;
 99                     break;
100                 case esriGeometryType.esriGeometryPolyline:
101                 case esriGeometryType.esriGeometryPath:
102                     ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass();
103                     lineSymbol.Color = getRGB(0, 0, 255);
104                     lineSymbol.Width = 10;
105                     symbol = lineSymbol as ISymbol;
106                     break;
107                 case esriGeometryType.esriGeometryPolygon:
108                 case esriGeometryType.esriGeometryRing:
109                     ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass();
110                     fillSymbol.Color = getRGB(0, 0, 255);
111                     symbol = fillSymbol as ISymbol;
112                     break;
113             }
114             symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
115             return symbol;
116         }
117         private IColor getRGB(int i, int j, int k)
118         {
119             IRgbColor rgb = new RgbColorClass();
120             rgb.Red = i;
121             rgb.Green = j;
122             rgb.Blue = k;
123             return rgb;
124         }
125     }
126 }