概述
//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();
最后
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