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 }
