关键代码：

        /// <summary>        /// 自定义ChartControl的Tooltip        /// </summary>        /// <param name="chart">ChartControl</param>        /// <param name="e">MouseEventArgs</param>        /// <param name="tooltip">ToolTipController</param>        /// <param name="tooltipTitle">ToolTipController的Title</param>        /// <param name="paramter">委托</param>        public static void CustomToolTip(this ChartControl chart, MouseEventArgs e, ToolTipController tooltip, string tooltipTitle, System.Func<string, double[], string> paramter)        {            ChartHitInfo _hitInfo = chart.CalcHitInfo(e.X, e.Y);            SeriesPoint _point = _hitInfo.SeriesPoint;            if (_point != null)            {                string _msg = paramter(_point.Argument, _point.Values);                tooltip.ShowHint(_msg, tooltipTitle);            }            else            {                tooltip.HideHint();            }        }

使用代码：

        private void chartControl1_MouseMove(object sender, MouseEventArgs e)        {            ChartControl _curChart = sender as ChartControl;            _curChart.CustomToolTip(e, toolTipController1, "交易详情", (agr, values) =>            {                return string.Format("时间：{0}\r\n金额:{1}", agr, values[0]);            });        }

运行效果：

[DevExpress]ChartControl之自定义Tooltip示例