AE鹰眼实现

主要步骤：1鹰眼和主视图的地图同步 2 响应主视图范围发生变化时，在鹰眼视图中绘制一个矩形框（通过设置填充颜色的透明度）3 设置移动鹰眼视图中的方框，主视图的联动（其实是主视图的当前视图范围出现变化，导致重新绘制方框，也就是方框的移动）

代码如下：

 private void axMapControl1_OnMapReplaced(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMapReplacedEvent e)
        {
            IMap pMap = axMapControl1.Map;
            axMapControl2.ClearLayers();
            axMapControl2.ActiveView.Refresh();
            //axMapControl2.LoadMxFile(axMapControl1.DocumentFilename);这也可以让地图同步加载
            for (int i = 0; i < pMap.LayerCount; i++)
            {
              axMapControl2.Map.AddLayer(pMap.get_Layer(i));
            }
        }

        private void axMapControl1_OnExtentUpdated(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnExtentUpdatedEvent e)
        {
            IEnvelope pEnv = e.newEnvelope as IEnvelope; //这就是矩形框的大小，可惜不知道怎么调
            IGraphicsContainer pGraphicCOntainer = axMapControl2.Map as IGraphicsContainer;
            pGraphicCOntainer.DeleteAllElements();

            IRgbColor color = Get_RGB(255, 0, 255);//设置矩形框的边界颜色和不透明
            color.Transparency = 255;
            ILineSymbol pLine = new SimpleLineSymbolClass();
            pLine.Width = 2;
            pLine.Color = color;

            color = Get_RGB(0, 255, 0); //设置矩形框填充颜色和透明
            color.Transparency = 0;
            IFillSymbol pFill = new SimpleFillSymbolClass();
            pFill.Color = color;
            pFill.Outline = pLine;

            IFillShapeElement pFillShapeElement = new RectangleElementClass();//新建一个矩形框元素
            pFillShapeElement.Symbol = pFill;
            IElement pEle = pFillShapeElement as IElement;
            pEle.Geometry = pEnv;

            pGraphicCOntainer.AddElement(pEle, 0);//添加矩形框元素
            IActiveView pActive = pGraphicCOntainer as IActiveView;
            pActive.Refresh();

        }
        private IRgbColor Get_RGB(int r,int g,int b)
        {
            IRgbColor color = new RgbColorClass();
            color.Red = r;
            color.Green = g;
            color.Blue = b;
            return color;
        }

        private void axMapControl2_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)
        {
            IPoint point = new PointClass();
            point.PutCoords(e.mapX, e.mapY);  
            axMapControl1.CenterAt(point);
        }