ArcGIS Engine检索要素集、要素类和要素

        /// <summary>
        /// 获取所有要素集
        /// </summary>
        /// <param name="workspace">工作空间对象</param>
        /// <returns>要素集列表</returns>
        public static List<IFeatureDataset> GetAllFeatureClass(IWorkspace workspace)
        {
            IEnumDataset dataset = workspace.get_Datasets(esriDatasetType.esriDTFeatureDataset);
            IFeatureDataset featureDataset = dataset.Next() as IFeatureDataset;


            List<IFeatureDataset> featureDatasetList = new List<IFeatureDataset>();
            while (featureDataset != null)
            {
                featureDatasetList.Add(featureDataset);
                featureDataset = dataset.Next() as IFeatureDataset;
            }
            return featureDatasetList;
        }        /// <summary>
        /// 获取所有要素集