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;
}