ArcEngine 点、线、面(圆，矩形)选择要素

 #region  要素选择
       
        IGeometry selectGeometry = null;
        private void pointSelect(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e) //点选
        {
            IEnvelope pEnv;
            IActiveView pActiveView = axMapControl1.ActiveView;
            IMap pMap = axMapControl1.Map;
            pEnv = axMapControl1.TrackRectangle();
            if (pEnv.IsEmpty == true)
            {
                ESRI.ArcGIS.esriSystem.tagRECT r;
                r.bottom = e.y + 5;
                r.top = e.y - 5;
                r.left = e.x - 5;
                r.right = e.x + 5;
                pActiveView.ScreenDisplay.DisplayTransformation.TransformRect(pEnv, ref r, 4);
                pEnv.SpatialReference = pActiveView.FocusMap.SpatialReference;
            }
            selectGeometry = pEnv as IGeometry;
            axMapControl1.Map.SelectByShape(selectGeometry, null, false);
            axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
        }
 
        private void lineSelect()        //线选
        {
            selectGeometry = axMapControl1.TrackLine();
            axMapControl1.Map.SelectByShape(selectGeometry, null, false);
            axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
        }
 
        private void cubeSelect()        //框选
        {
            IMap pMap = axMapControl1.Map;
            IActiveView pActiveView = pMap as IActiveView;
            IEnvelope pEnv = axMapControl1.TrackRectangle();
            pMap.SelectByShape(pEnv, null, false);
            pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
        }
 
        private void circleSelect()      //圆选
        {
            selectGeometry = axMapControl1.TrackCircle();
            axMapControl1.Map.SelectByShape(selectGeometry, null, false);
            axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
        }
 
        private void zoomIn()
        {
            IEnvelope pEnv = axMapControl1.TrackRectangle();
            pEnv = axMapControl1.Extent;
            pEnv.Expand(0.5, 0.5, true);
            axMapControl1.Extent = pEnv;
        }
 
        private void zoomOut()
        {
            IEnvelope pEnv = axMapControl1.TrackRectangle();
            pEnv = axMapControl1.Extent;
            pEnv.Expand(2, 2, true);
            axMapControl1.Extent = pEnv;
        }
        #endregion
 

转载自：https://blog.csdn.net/kone0611/article/details/78530214