ArcGIS Engine检索要素集、要素类和要素

转自原文 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>
    /// 获取所有要素类
    /// </summary>
    /// <param name="featureDataset">要素集</param>
    /// <returns>要素类列表</returns>
    public static List<IFeatureClass> GetAllFeatureClass(IFeatureDataset featureDataset)
    {
        IFeatureClassContainer featureClassContainer = (IFeatureClassContainer)featureDataset;
        IEnumFeatureClass enumFeatureClass = featureClassContainer.Classes;
        IFeatureClass featureClass = enumFeatureClass.Next();  

        List<IFeatureClass> featureClassList = new List<IFeatureClass>();
        while (featureClass != null)
        {
            featureClassList.Add(featureClass);
            featureClass = enumFeatureClass.Next();
        }
        return featureClassList;
    }  

    /// <summary>
    /// 获取所有要素
    /// </summary>
    /// <param name="featureClass">要素类</param>
    /// <returns>要素列表</returns>
    public static List<IFeature> GetAllFeatureClass(IFeatureClass featureClass)
    {
        List<IFeature> featureList = new List<IFeature>();
        IFeatureCursor featureCursor = featureClass.Search(null, false);
        IFeature feature = featureCursor.NextFeature();  

        while (feature != null)
        {
            featureList.Add(feature);
            feature = featureCursor.NextFeature();
        }
        return featureList;
    }