如何动态绘制样条线？

• 回答：

      var param = mxOcx.NewResbuf();
      mxOcx.SendStringToExecuteFun("_DrawSpline", param);
      var retparam = mxOcx.GetEntitysLastCmd();
      if (retparam == null)
          return;
      if (retparam.Count == 0)
          return;
      var spline = retparam.AtObject(0);
      if (spline == null) {
          return;
      }
      //把实体绘制到图上。一般用于动态拖放时，在拖放结束时，绘制到图上；返回新绘制的实体的id
      spline.Draw();