C#+arcengine10.0+SP5实现鹰眼（加载的是mdb数据库中的数据）

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.Controls;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.DataSourcesRaster;
using DevComponents.DotNetBar;

using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.Display;

 private void axMap_OnMapReplaced(object sender, IMapControlEvents2_OnMapReplacedEvent e)
        {        
            #region 添加鹰眼   载入地图到鹰眼控件
            AddLayerToOverViewMap();
            #endregion                   
        }

  #region 鹰眼功能
        /// <summary>
        /// 把地图加到鹰眼里的方法，
        ///该段代码摘自http://www.cnblogs.com/zya-gis/archive/2009/04/17/1438033.html，非常好用，解决了我鹰眼一直不能显示的问题
        /// </summary>
        private void AddLayerToOverViewMap()
        {
            axMapSmall.ClearLayers();
            for (int i = 0; i < axMap.LayerCount; i++)
            {
                IObjectCopy objectcopy = new ObjectCopyClass();
                object toCopyLayer = axMap.get_Layer(i);
                object copiedLayer = objectcopy.Copy(toCopyLayer);
                ILayer C = (new FeatureLayerClass()) as ILayer;
                object toOverwriteLayer = C;
                objectcopy.Overwrite(copiedLayer, ref toOverwriteLayer);
                axMapSmall.AddLayer(C, i);
            }
        }
        private void axMap_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)    //绘制鹰眼矩形框
        {
            try
            {
                //得到范围
                IEnvelope pEnv = e.newEnvelope as IEnvelope;
                IGraphicsContainer pGraphicsContainer = axMapSmall.Map as IGraphicsContainer;
                IActiveView pActiveView = pGraphicsContainer as IActiveView;
                //在绘制新的矩形框前，清楚、清除Map对象中的任何图形元素
                pGraphicsContainer.DeleteAllElements();
                IRectangleElement pRectangleEle = new RectangleElementClass();
                IElement pEle = pRectangleEle as IElement;
                pEle.Geometry = pEnv;
                IRgbColor pColor = new RgbColorClass();
                pColor.RGB = 255;
                pColor.Transparency = 255;
                //产生一个线符号对象
                ILineSymbol pOutLine = new SimpleLineSymbolClass();
                pOutLine.Width = 1;
                pOutLine.Color = pColor;
                //设置颜色属性
                pColor.RGB = 255; pColor.Transparency = 0;
                //设置填充符号的属性
                IFillSymbol pFillsymbol = new SimpleFillSymbolClass();
                pFillsymbol.Color = pColor;
                pFillsymbol.Outline = pOutLine;
                IFillShapeElement pFillshapEle;
                pFillshapEle = pEle as IFillShapeElement;
                pFillshapEle.Symbol = pFillsymbol;
                pEle = pFillshapEle as IElement;
                pGraphicsContainer.AddElement(pEle, 0);
                pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
            }
            catch (Exception ey)
            {
 
            }                   
        }
        private void axMapSmall_OnMouseDown(object sender, AxESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)    //鹰眼与主 Map 控件互动
        {
            if (this.axMapSmall.Map.LayerCount != 0)
            {
                // 按下鼠标左键移动矩形框
                if (e.button == 1)
                {
                    IPoint pPoint = new PointClass();
                    pPoint.PutCoords(e.mapX, e.mapY);
                    IEnvelope pEnvelope = this.axMap.Extent;
                    pEnvelope.CenterAt(pPoint);
                    this.axMap.Extent = pEnvelope;
                    this.axMap.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
                }

                // 按下鼠标右键绘制矩形框
                else if (e.button == 2)
                {
                    IEnvelope pEnvelop = this.axMapSmall.TrackRectangle();
                    this.axMap.Extent = pEnvelop;
                    this.axMap.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
                }

            }
        }
        private void axMapSmall_OnMouseMove(object sender, AxESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseMoveEvent e)   //按下鼠标左键的时候移动矩形框，同时也改变主的图控件的显示范围
        {
            // 如果不是左键按下就直接返回
            if (e.button != 1) return;
            IPoint pPoint = new PointClass();
            pPoint.PutCoords(e.mapX, e.mapY);
            this.axMap.CenterAt(pPoint);
            this.axMap.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
        }
        #endregion 鹰眼功能完结