/// <summary>
/// 在指定路径(shp/mdb/gdb)中创建新的要素类，并返回该要素类（注意路径中不能存在同名要素类）
/// </summary>
/// <param name="fullPath">
/// 要素类的完整保存路径，包含以下情况：
/// ①shp文件路径，创建shp文件；若shp文件所在目录不存在则自动创建；
/// ②mdb文件路径[\DatasetName]\FeatureClassName，在mdb中或mdb的指定要素集中，创建指定名称的图层；若mdb或要素集不存在则自动创建；
/// ③gdb目录[\DatasetName]\FeatureClassName，在gdb中或gdb的指定要素集中，创建指定名称的图层；若gdb或要素集不存在则自动创建；
/// </param>
/// <param name="geoType">要素类的几何类型</param>
/// <param name="spatialRef">空间参考（坐标系），创建方法参考<see cref="SpatialRefOpt.CreateSpatialRef(int, ESrType)"/>及该方法的重载</param>
/// <param name="otherFields">除了OID和SHAPE字段的其他字段</param>
/// <returns></returns>
public static IFeatureClass CreateToPath(string fullPath, esriGeometryType geoType, ISpatialReference spatialRef, IEnumerable <IField> otherFields = null)
{
IFields fields = FieldOpt.CreateBaseFields(geoType, spatialRef);
fields.AddFields(otherFields);
return(CreateToPath(fullPath, fields));
}
/// <summary>
/// 创建一个空表格（仅包含OID字段）
/// </summary>
/// <param name="featureWorkspace">创建表格的工作空间</param>
/// <param name="name">表格名称</param>
/// <returns></returns>
public static ITable CreateTable(this IFeatureWorkspace featureWorkspace, string name)
{
IFields fields = new FieldsClass();
IFieldsEdit fieldsEdit = (IFieldsEdit)fields;
fieldsEdit.AddField(FieldOpt.CreateOidField());
return(featureWorkspace.CreateTable(name, fields, null, null, ""));
}
/// <summary>
/// 复制源要素类的表结构，创建一个空的要素类
/// </summary>
/// <param name="sourceClass">源要素类</param>
/// <param name="targetFullPath">新要素类的保存路径</param>
/// <param name="geoType">要素类的几何类型</param>
/// <param name="aliasName">新要素类别名，值为null则别名与名字相同</param>
/// <returns></returns>
public static IFeatureClass CopyStruct(this IFeatureClass sourceClass, string targetFullPath, esriGeometryType geoType, string aliasName = null)
{
var spatialRef = sourceClass.GetSpatialRef();
var feilds = sourceClass.CloneFeatureClassFieldsSimple();
var shapeField = FieldOpt.CreateShapeField(geoType, spatialRef);
((IFieldsEdit)feilds).AddField(shapeField);
var featureClass = FeatureClassEx.CreateToPath(targetFullPath, feilds);
if (!String.IsNullOrEmpty(aliasName))
{
featureClass.RenameFeatureClassAliasName(aliasName);
}
return(featureClass);
}
/// <summary>
/// 在指定目录（shp目录）或地理数据库（shp/mdb/gdb/sde/sql）中创建新的要素类，并返回该要素类（注意路径中不能存在同名要素类）
/// </summary>
/// <param name="geoDbPath">mdb文件路径，或shp所在文件夹路径，或gdb文件夹路径，或sde/sql数据库连接字符串</param>
/// <param name="datasetName">要素数据集名称，若赋值为null则直接在数据库下创建要素类，否则在该要素数据集(不存在则创建)下创建要素类</param>
/// <param name="className">需要创建的要素类名称</param>
/// <param name="geoType">要素类的几何类型</param>
/// <param name="spatialRef">空间参考（坐标系），创建方法参考<see cref="SpatialRefOpt.CreateSpatialRef(int, ESrType)"/>及该方法的重载</param>
/// <param name="otherFields">除了OID和SHAPE字段的其他字段</param>
/// <returns></returns>
public static IFeatureClass CreateToDb(string geoDbPath, string datasetName, string className, esriGeometryType geoType,
ISpatialReference spatialRef, IEnumerable <IField> otherFields = null)
{
var fields = FieldOpt.CreateFields(geoType, spatialRef, otherFields);
var workspace = WorkspaceEx.GetWorkSpace(geoDbPath);
IFeatureClass featureClass;
if (!string.IsNullOrEmpty(datasetName))
{
var featureDataset = workspace.GetFeatureDataset(datasetName) ?? workspace.CreateFeatureDataset(datasetName, spatialRef);
featureClass = featureDataset.CreateFeatureClass(className, fields, null, null, esriFeatureType.esriFTSimple, "SHAPE", "");
Marshal.ReleaseComObject(featureDataset);
}
else
{
featureClass = Create(workspace, className, spatialRef, geoType, fields);
}
Marshal.ReleaseComObject(workspace);
return(featureClass);
}
