AE要素闪烁的两种方法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Display;

namespace Test_FieldsQuery
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            axMapControl1.LoadMxFile("数据\Asia.mxd");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ILayer pLayer = axMapControl1.get_Layer(0);
            IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;
            IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;

            IQueryFilter pQueryFilter = new QueryFilterClass();
            pQueryFilter.WhereClause = "POPULATION > 5000000";

            IFeatureCursor pFeatureCursor = pFeatureClass.Search(pQueryFilter, false);
            IFeature pFeature = pFeatureCursor.NextFeature();
            while (pFeature != null)
            {
                //第一种方法
                this.axMapControl1.FlashShape(pFeature.Shape, 2, 1000,CreateSimpleSymbol(pFeature.Shape.GeometryType));
                //或者
                this.axMapControl1.FlashShape(pFeature.Shape, 2, 1000,Type.Missing);
                //第二种方法
                //FlashGeometry(pFeature.Shape, 3, 300);
                pFeature = pFeatureCursor.NextFeature();
            }
        }

        /// <summary>
        /// 闪烁指定要素IGeometry
        /// </summary>
        /// <param name="geometry">要素</param>
        /// <param name="flashCount">闪烁次数</param>
        /// <param name="interval">每次闪烁的时间</param>
        private void FlashGeometry(IGeometry geometry, int flashCount, int interval)
        {
            IScreenDisplay display = axMapControl1.ActiveView.ScreenDisplay;
            ISymbol symbol = CreateSimpleSymbol(geometry.GeometryType);
            display.StartDrawing(0, (short)esriScreenCache.esriNoScreenCache); display.SetSymbol(symbol);
            for (int i = 0; i < flashCount; i++)
            {
                switch (geometry.GeometryType)
                {
                    case esriGeometryType.esriGeometryPoint:
                        display.DrawPoint(geometry);
                        break;
                    case esriGeometryType.esriGeometryMultipoint:
                        display.DrawMultipoint(geometry);
                        break;
                    case esriGeometryType.esriGeometryPolyline:
                        display.DrawPolyline(geometry);
                        break;
                    case esriGeometryType.esriGeometryPolygon:
                        display.DrawPolygon(geometry);
                        break;
                }
                System.Threading.Thread.Sleep(interval);
            }
            display.FinishDrawing();
        }
        /// <summary>
        /// 根据几何类型创建闪烁符号
        /// </summary>
        /// <param name="geometryType">要素几何类型</param>
        /// <returns>ISymbol</returns>
        private ISymbol CreateSimpleSymbol(esriGeometryType geometryType)
        {
            ISymbol symbol = null;
            switch (geometryType)
            {
                case esriGeometryType.esriGeometryPoint:
                case esriGeometryType.esriGeometryMultipoint:
                    ISimpleMarkerSymbol markerSymbol = new SimpleMarkerSymbolClass();
                    markerSymbol.Color = getRGB(0, 0, 255);
                    markerSymbol.Size = 10;
                    symbol = markerSymbol as ISymbol;
                    break;
                case esriGeometryType.esriGeometryPolyline:
                case esriGeometryType.esriGeometryPath:
                    ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass();
                    lineSymbol.Color = getRGB(0, 0, 255);
                    lineSymbol.Width = 10;
                    symbol = lineSymbol as ISymbol;
                    break;
                case esriGeometryType.esriGeometryPolygon:
                case esriGeometryType.esriGeometryRing:
                    ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass();
                    fillSymbol.Color = getRGB(0, 0, 255);
                    symbol = fillSymbol as ISymbol;
                    break;
            }
            symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
            return symbol;
        }
        private IColor getRGB(int i, int j, int k)
        {
            IRgbColor rgb = new RgbColorClass();
            rgb.Red = i;
            rgb.Green = j;
            rgb.Blue = k;
            return rgb;
        }
    }
}