zedGraph 鼠标悬停 显示内容

 zedGraphControl1.PointValueEvent+=new ZedGraphControl.PointValueHandler(MyPointValueHandler);

 

 

 //鼠标悬停节点事件
        private string MyPointValueHandler(ZedGraphControl sender, GraphPane pane, CurveItem curve, int iPt)
        {
            PointPair pt = curve[iPt];
           return "X="+pt.X.ToString()+" \n Y="+pt.Y.ToString();   

     }