MapXtreme中鹰眼图与本地地图联动

第一步：本地地图与鹰眼图载入同一地图

mapControl.Map.Load(MapInfo.Mapping.MapLoader.CreateFromFile(mapFile.File));

                mapControlOver.Map.Load(MapInfo.Mapping.MapLoader.CreateFromFile(mapFile.File));

第二步：为mapControl.Map添加viewchang的事件

this.mapControl.Map.ViewChangedEvent += new MapInfo.Mapping.ViewChangedEventHandler(Map_ViewChangedEvent);

第三步：根据mapcontro.Map的viewchange事件调整鹰眼图显示的内容

private void UpdateHawkeyeMap()
        {
            try
            {
                //如果主图和鹰眼图加载的是同一实例，那么鹰眼图就需要检测是否有效
                if (mapControlOver.Map != null)
                {
                    //加载鹰眼矩形临时表
                    Table tblRect;
                    tblRect = Session.Current.Catalog.GetTable("TempRectHawkeye");
                    if (tblRect != null)
                        tblRect.Close();
                    TableInfo tblInfo;
                    tblInfo = TableInfoFactory.CreateTemp("TempRectHawkeye");
                    TableSessionInfo tblSessionInfo = new TableSessionInfo();

                    tblRect = Session.Current.Catalog.CreateTable(tblInfo, tblSessionInfo);
                    FeatureLayer feaLayer = new FeatureLayer(tblRect);

                    mapControlOver.Map.Layers.Insert(0, feaLayer);

                    //实时在鹰眼临时表图上画矩形
                    tblRect = Session.Current.Catalog.GetTable("TempRectHawkeye");
                    (tblRect as ITableFeatureCollection).Clear();//清除当前层上的图元

                    //设置矩形的样式
                    DRect rect = mapControl.Map.Bounds;
                    FeatureGeometry feageo = new MapInfo.Geometry.Rectangle(mapControl.Map.GetDisplayCoordSys(), rect);
                    SimpleLineStyle simLineStyle = new SimpleLineStyle(new LineWidth(2, MapInfo.Styles.LineWidthUnit.Point), 2, System.Drawing.Color.Red);
                    SimpleInterior simInterior = new SimpleInterior(9, System.Drawing.Color.Gray, System.Drawing.Color.Green, true);
                    CompositeStyle comStyle = new CompositeStyle(new AreaStyle(simLineStyle, simInterior), null, null, null);

                    //将矩形插入到图层中
                    Feature fea = new Feature(feageo, comStyle);
                    tblRect.InsertFeature(fea);
                    //重新定位鹰眼图的中心
                    mapControlOver.Map.Center = mapControl.Map.Center;
                    mapControlOver.Map.Layers["TempRectHawkeye"].Invalidate();

                    //清理对象变量
                    tblSessionInfo = null;
                    feageo = null;
                    simLineStyle = null;
                    simInterior = null;
                    comStyle = null;
                    fea = null;
                }
            }
            catch (Exception ex)
            {
                ExceptionLog.Log("显示鹰眼图错误，" + ex.Message);
            }

第四步：把此函数放在viewchange事件中

 void Map_ViewChangedEvent(object sender, MapInfo.Mapping.ViewChangedEventArgs e)
        {

            UpdateHawkeyeMap();
        }

第五步：为鹰眼图添加点击事件

 private void mapControlOver_MouseClick(object sender, MouseEventArgs e)
        {
            MoveLocalMap(GetOverviewCoordPt(e.X, e.Y));
        }
 //定位到指定经纬度
        private void MoveLocalMap(DPoint dpt)
        {
            mapControl.Map.SetView(dpt, mapControl.Map.GetDisplayCoordSys(), mapControl.Map.Zoom);
        }
//鹰眼图坐标转换到经纬度
        private DPoint GetOverviewCoordPt(int x, int y)
        {
            DPoint dpt = new DPoint();
            mapControlOver.Map.DisplayTransform.FromDisplay(new System.Drawing.Point(x, y), out dpt);
            return dpt;
        }

至此完成本地地图与鹰眼图的联动