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();   
}