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, "");

        }

//删除shp

//如果已存在,那么删除

            IFeatureClass pFCChecker = pFeatureWorkSpace.OpenFeatureClass(shpname);

            if (pFCChecker != null)

            {

                IDataset pds = pFCChecker as IDataset;

                pds.Delete();

            }

//向shp中添加要素

        /// <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();

        }

//官方例子

  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();

             }