private void axMapControl1_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)

         {

             //获取地图当前的范围（包络线）

             IEnvelope pEnvelope = (IEnvelope)e.newEnvelope;

             //将鹰眼地图设置为地理容器,再设置为活动视图

             IGraphicsContainer pGraphicsContainer = axMapControl2.Map as IGraphicsContainer;

             IActiveView pActiveView = pGraphicsContainer as IActiveView;

             //清除鹰眼地图中的任何图形元素

             pGraphicsContainer.DeleteAllElements();

             //设置矩形范围

             IRectangleElement pRectangeEle = new RectangleElementClass();

             IElement pElement = pRectangeEle as IElement;

             pElement.Geometry = pEnvelope;

             //创建鹰眼图中的红线框

             IRgbColor pColor = new RgbColor();

             pColor.Red = ;

             pColor.Blue = ;

             pColor.Green = ;

             pColor.Transparency = ;

             //创建线符号对象

             ILineSymbol pOutline = new SimpleLineSymbolClass();

             pOutline.Width = ;

             pOutline.Color = pColor;

             //设置颜色属性

             pColor = new RgbColorClass();

             pColor.Red = ;

             pColor.Blue = ;

             pColor.Green = ;

             pColor.Transparency = ;

             //设置填充符号

             IFillSymbol pFillSymbol = new SimpleFillSymbolClass();

             pFillSymbol.Color = pColor;

             pFillSymbol.Outline = pOutline;

             IFillShapeElement pFillShapeEle = pElement as IFillShapeElement;

             pFillShapeEle.Symbol = pFillSymbol;

             pGraphicsContainer.AddElement((IElement)pFillShapeEle, );

             pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

         }

         private void axMapControl1_OnMapReplaced(object sender, IMapControlEvents2_OnMapReplacedEvent e)

         {

             if (axMapControl1.LayerCount > )

             {

                 axMapControl2.Map = new MapClass();

                 for (int i = ; i <= axMapControl1.LayerCount - ; i++)

                 {

                     axMapControl2.Map.AddLayer(axMapControl1.Map.get_Layer(i));

                 }

                 axMapControl2.Extent = axMapControl1.Extent;

                 axMapControl2.Refresh();

             }

             //axMapControl2.LoadMxFile(axMapControl1.DocumentFilename);

             //axMapControl2.Refresh();

             //axMapControl2.Extent = axMapControl2.FullExtent;

         }

         private void axMapControl2_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)

         {

             if (e.button == )

             {

                 IPoint pPoint = new PointClass();

                 pPoint.PutCoords(e.mapX, e.mapY);

                 axMapControl1.CenterAt(pPoint);

                 axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);

             }

         }

         private void axMapControl2_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)

         {

             if (axMapControl2.Map.LayerCount > )

             {

                 if (e.button == )

                 {

                     IPoint pPoint = new PointClass();

                     pPoint.PutCoords(e.mapX, e.mapY);

                     axMapControl1.CenterAt(pPoint);

                     axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);

                 }

                 else

                 {

                     IEnvelope pEnv = axMapControl2.TrackRectangle();

                     axMapControl1.Extent = pEnv;

                     axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);

                 }

             }

         }