关键代码：

        /// <summary>        /// 设置饼状图的Lable位置        /// </summary>        /// <param name="series">Series</param>        /// <param name="lablePosition">PieSeriesLabelPosition枚举</param>        public static void SetLablePosition(this Series series, PieSeriesLabelPosition lablePosition)        {            if (series.Label is PieSeriesLabel)            {                PieSeriesLabel _label = series.Label as PieSeriesLabel;                _label.Position = lablePosition;            }            //if (series.Label is Pie3DSeriesLabel)            //{            //    Pie3DSeriesLabel _label = series.Label as Pie3DSeriesLabel;            //    _label.Position = lablePosition;            //}        }

运行效果：

<style type="text/css">.csharpcode, .csharpcode pre{ font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/}.csharpcode pre { margin: 0em; }.csharpcode .rem { color: #008000; }.csharpcode .kwrd { color: #0000ff; }.csharpcode .str { color: #006080; }.csharpcode .op { color: #0000c0; }.csharpcode .preproc { color: #cc6633; }.csharpcode .asp { background-color: #ffff00; }.csharpcode .html { color: #800000; }.csharpcode .attr { color: #ff0000; }.csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em;}.csharpcode .lnum { color: #606060; }</style>

[DevExpress]设置饼状图的Lable位置