转自原文

此种方式为IElement的方式在axMapControl的GraphicsContainer中好绘制图形。

 

//画点

IPoint pt = axMapControl1.ToMapPoint(e.x, e.y);

IMarkerElement pMarkerElement = new MarkerElementClass();

IElement pElement = pMarkerElement as IElement;

pElement.Geometry = pt;

IGraphicsContainer pGraphicsContainer = pMap as IGraphicsContainer;

pGraphicsContainer.AddElement((IElement)pMarkerElement, 0);

pActiveView.Refresh();

//画线

IGeometry polyline = axMapControl1.TrackLine();

ILineElement pLineElement = new LineElementClass();

IElement pElement = pLineElement as IElement;

pElement.Geometry = polyline;

IGraphicsContainer pGraphicsContainer = pMap as IGraphicsContainer;

pGraphicsContainer.AddElement((IElement)pLineElement, 0);

pActiveView.Refresh();

//画面

IGeometry Polygon = axMapControl1.TrackPolygon();

IPolygonElement PolygonElement = new PolygonElementClass();

IElement pElement = PolygonElement as IElement;

pElement.Geometry = Polygon;

pGraphicsContainer = pMap as IGraphicsContainer;

pGraphicsContainer.AddElement((IElement)PolygonElement, 0);

 

 

 

pActiveView.Refresh();