/// <summary>
/// 在指定目录（shp目录）或地理数据库（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="fields">字段集合（应包含OID和Shape字段）</param>
/// <returns></returns>
public static IFeatureClass CreateToDb(string geoDbPath, string datasetName, string className, IFields fields)
{
var workspace = WorkspaceEx.GetWorkSpace(geoDbPath);
var spatialRef = fields.GetSpatialRef();
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 = (workspace as IFeatureWorkspace)?.CreateFeatureClass(className, fields, null, null, esriFeatureType.esriFTSimple, "SHAPE", "");
}
Marshal.ReleaseComObject(workspace);
return(featureClass);
}