AE基础之添加点、线、面要素

桃扇骨 2022-04-14 05:49 491阅读 0赞

事先定义pmap和pactiveview对象

IMap pmap = axMapControl1.Map;  
            IActiveView pactview = axMapControl1.ActiveView;

**点要素tian添加**

1、在MapControl1的mouse事件中添加如下代码

axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair;

IGeometry pt = axMapControl1.ToMapPoint((int)e.mapX, (int)e.mapY);

IMarkerElement markerelement = new MarkerElementClass();  
IElement element = markerelement as IElement;  
element.Geometry = pt;  
IGraphicsContainer graphicscontainer = pmap as IGraphicsContainer;  
graphicscontainer.AddElement((IElement)markerelement, 0);  
pactview.Refresh();

2、在点要素单击事件按钮中调用以上代码

**线要素添加**

1、在MapControl1的mouse事件中添加如下代码

axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair;  
                IGeometry polyline = axMapControl1.TrackLine();  
                ILineElement plele = new LineElementClass();  
                IElement PELE = plele as IElement;  
                PELE.Geometry = polyline;  
                IGraphicsContainer pgracontainer = pmap as IGraphicsContainer;  
                pgracontainer.AddElement((IElement)plele, 0);  
                pactview.Refresh();

2、在线要素单击事件按钮中调用以上代码

**面要素添加**

1、在MapControl1的mouse事件中添加如下代码

axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair;  
                IGeometry poly = axMapControl1.TrackPolygon();  
                IPolygonElement polygonele = new PolygonElementClass();  
                IElement pelement = polygonele as IElement;  
                pelement.Geometry = poly;  
                IGraphicsContainer pgraphicscontainer = pmap as IGraphicsContainer;  
                pgraphicscontainer.AddElement((IElement)polygonele, 0);  
                pactview.Refresh();

2、在面要素单击事件按钮中调用以上代码