AE CreateFeatureClass 创建shp. 删除shp. 向shp中添加要素

/// <summary>
/// 创建多边形shp
/// </summary>
/// <param name="pPolygon"></param>
/// <param name="shpPath"></param>
public static  void CreatePolygonFeatureClass(IPolygon pPolygon, string shpfolder,string shpname)
{
IWorkspaceFactory pWorkSpaceFac = new ShapefileWorkspaceFactoryClass();
IFeatureWorkspace pFeatureWorkSpace = pWorkSpaceFac.OpenFromFile(shpfolder,0) as IFeatureWorkspace;

//创建字段集2
IFeatureClassDescription fcDescription = new FeatureClassDescriptionClass();
IObjectClassDescription ocDescription = (IObjectClassDescription)fcDescription;//创建必要字段
IFields fields = ocDescription.RequiredFields;
int shapeFieldIndex = fields.FindField(fcDescription.ShapeFieldName);
IField field = fields.get_Field(shapeFieldIndex);
IGeometryDef geometryDef = field.GeometryDef;
IGeometryDefEdit geometryDefEdit = (IGeometryDefEdit)geometryDef;
//geometryDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;
//geometryDefEdit.SpatialReference_2 = spatialReference;

geometryDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolygon;
ISpatialReferenceFactory pSpatialRefFac = new SpatialReferenceEnvironmentClass();
IProjectedCoordinateSystem pcsSys = pSpatialRefFac.CreateProjectedCoordinateSystem((int)esriSRProjCS4Type.esriSRProjCS_Xian1980_3_Degree_GK_Zone_39);
geometryDefEdit.SpatialReference_2 = pcsSys;

IFieldChecker fieldChecker = new FieldCheckerClass();
IEnumFieldError enumFieldError = null;
IFields validatedFields = null; //将传入字段 转成 validatedFields
fieldChecker.ValidateWorkspace = (IWorkspace)pFeatureWorkSpace;
fieldChecker.Validate(fields, out enumFieldError, out validatedFields);

pFeatureWorkSpace.CreateFeatureClass(shpname, validatedFields, ocDescription.InstanceCLSID, ocDescription.ClassExtensionCLSID, esriFeatureType.esriFTSimple, fcDescription.ShapeFieldName, "");
}

//如果已存在,那么删除
IFeatureClass pFCChecker = pFeatureWorkSpace.OpenFeatureClass(shpname);
if (pFCChecker != null)
{
IDataset pds = pFCChecker as IDataset;
pds.Delete();
}

/// <summary>
/// 向多边形shp中添加要素
/// </summary>
/// <param name="pPolygon">多边形</param>
/// <param name="pFeatureClass">多边形shp</param>
public static void AddFeatureToFeatureClass(IPolygon pPolygon,IFeatureClass pFeatureClass)
{
IFeature pFeature = pFeatureClass.CreateFeature();
pFeature.Shape = pPolygon;
pFeature.Store();
}

public void IFeatureClass_CreateFeature_Example(IFeatureClass featureClass)
{
//Function is designed to work with polyline data
if (featureClass.ShapeType != ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline) { return; }
//create a geometry for the features shape
ESRI.ArcGIS.Geometry.IPolyline polyline = new ESRI.ArcGIS.Geometry.PolylineClass();
ESRI.ArcGIS.Geometry.IPoint point = new ESRI.ArcGIS.Geometry.PointClass();
point.X = 0; point.Y = 0;
polyline.FromPoint = point;
point = new ESRI.ArcGIS.Geometry.PointClass();
point.X = 10; point.Y = 10;        polyline.ToPoint = point;
IFeature feature = featureClass.CreateFeature();
//Apply the constructed shape to the new features shape
feature.Shape = polyline;
ISubtypes subtypes = (ISubtypes)featureClass;
IRowSubtypes rowSubtypes = (IRowSubtypes)feature;
if (subtypes.HasSubtype)// does the feature class have subtypes?
{  rowSubtypes.SubtypeCode = 1; //in this example 1 represents the Primary Pipeline subtype
}
// initalize any default values that the feature has
rowSubtypes.InitDefaultValues();
//Commit the default values in the feature to the database
feature.Store();
//update the value on a string field that indicates who installed the feature.
feature.set_Value(feature.Fields.FindField("InstalledBy"), "K Johnston");
//Commit the updated values in the feature to the database
feature.Store();
}