C#+AE 展开/收缩图层的图例

         /// <summary>

        /// 展开/收缩图层的图例（最后需要执行toc的Update方法）

        /// </summary>

        /// <paramname="pLayer"></param>

        /// <paramname="bExpand"></param>

        public void ExpandLegend(ILayer pLayer, boolbExpand)

        {

            ILegendInfo pLegendInfo = pLayer asILegendInfo;





            int iLegendGroupCount =pLegendInfo.LegendGroupCount;

            ILegendGroup pLGroup;

            for (int i = 0; i <iLegendGroupCount; i++)

            {

                pLGroup =pLegendInfo.get_LegendGroup(i);

                pLGroup.Visible =bExpand;

            }

           axTOCControl1.Update();

        }