private void chartControl_ObjectSelected(object sender, HotTrackEventArgs e)

{

      e.Cancel = false;

      XYDiagram xyDiagram = null;

      if (e.Object is XYDiagram)

      {

         xyDiagram = (XYDiagram)e.Object;

      }

      else if (e.Object is SeriesBase)

      {

         xyDiagram = (XYDiagram)(e.HitInfo.Diagram);

      }

      if (xyDiagram != null)

      {

         DiagramCoordinates coord = xyDiagram.PointToDiagram(e.HitInfo.HitPoint);

         DateTime pTime = coord.DateTimeArgument;//时间点

         /*..其他针对该时间点的处理..*/

      }

}