Devexpress Chart series 點擊時獲取SeriesPoint的值

//設置此屬性為true
chartControl1.RuntimeHitTesting = true;

private void ChartControl1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            try
            {
                ChartHitInfo hitInfo = chartControl1.CalcHitInfo(e.Location);
                if (hitInfo.SeriesPoint == null)
                {
                    toolTip.HideHint();
                    return;
                }
                //圖例名
                string lengthName = ((DevExpress.XtraCharts.Native.IOwnedElement)hitInfo.SeriesPoint).Owner.ToString();
                //點的Y軸數值
                string yValue = hitInfo.SeriesPoint.Argument;
                //點的X軸數值
                string xValue = hitInfo.SeriesPoint.Values[0].ToString();
                toolTip.ShowHint(lengthName + "   " + xValue + "   " + yValue);
            }
            catch (Exception ex)
            {
                FileLogUtility.Error(ex);
            }
        }