IGraphicsContainer添加圆形元素

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我是靠谱客的博主爱笑小伙，最近开发中收集的这篇文章主要介绍IGraphicsContainer添加圆形元素，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

转自 http://bbs.esrichina-bj.cn/ESRI/viewthread.php?tid=84368 -Esri中国社区

代码清晰很值得参考

IActiveView pActiveView;

IMap pMap;
IGraphicsContainer pGraphicscon;
INewCircleFeedback pCircleFeed;
  private void Form1_Load(object sender, EventArgs e)
      {
         pMap = axMapControl1.Map;
         pActiveView = pMap as IActiveView;
         pGraphicscon = pActiveView as IGraphicsContainer;
      }
private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)
      {
         IPoint StartPoint = new PointClass();
         StartPoint.PutCoords(e.mapX, e.mapY);
         if (pCircleFeed == null)
         {
            pCircleFeed = new NewCircleFeedbackClass();
            pCircleFeed.Display = pActiveView.ScreenDisplay;
            pCircleFeed.Start(StartPoint);
         }
      }
private void axMapControl1_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)
      {
         IPoint MovePoint = new PointClass();
         MovePoint.PutCoords(e.mapX, e.mapY);
         if (pCircleFeed != null)
            pCircleFeed.MoveTo(MovePoint);
      }
private void axMapControl1_OnMouseUp(object sender, IMapControlEvents2_OnMouseUpEvent e)
      {
         IGeometry pGeo = pCircleFeed.Stop();
         pCircleFeed = null;
         IFillShapeElement pFillShap=new CircleElementClass ();
         IElement pEle = pFillShap as IElement;
         pEle.Geometry = pGeo;
         //pActiveView.Refresh();
         pGraphicscon.AddElement(pEle, 0);
         pActiveView.Refresh();
      }