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基本API 创建要素类名称对象
创建要素类名称对象
下面是创建要素类名称对象的CreateFeatureClass类的构造方法代码。
                                                            /// <param name="pTargetWorkspace">目标工作空间</param>
                                                            /// <param name="pSR">参考系</param>
                                                            /// <param name="feaName">目标图层名</param>
                                                            /// <param name="strFeatureDatasetName">要素数据集名称</param>
                                                            /// <param name="feaType">数据类型</param>
                                                            /// <param name="feaType">是否删除已存在图层</param>
                                                            /// <returns>创建的新要素类</returns>
                                                            public static IFeatureClass CreateFeatureClass(IWorkspace pTargetWorkspace, ISpatialReference pSR, string feaName, string strFeatureDatasetName,esriFeatureType feaType, bool bDeleteExistLayer = false)
                                                            {
                                                            //1.图层存在则返回该图层
                                                            if (((IWorkspace2)pTargetWorkspace).get_NameExists(esriDatasetType.esriDTFeatureClass, feaName))
                                                            {
                                                            IFeatureClass pFeatureClass = ((IFeatureWorkspace)pTargetWorkspace).OpenFeatureClass(feaName);
                                                            if (bDeleteExistLayer == true)
                                                            {
                                                            try
                                                            {
                                                            ((IDataset)pFeatureClass).Delete();
                                                            }
                                                            catch
                                                            { }
                                                            }
                                                            else
                                                            {
                                                            return pFeatureClass;
                                                            }
                                                            }
                                                            SouthGIS.AePlatform.Model.WorkspaceFactory pWorkspaceFactory = new AePlatform.Model.WorkspaceFactory();
                                                            //2.先创建要素数据集
                                                            IFeatureDataset pFeatureDataset = null;
                                                            if (strFeatureDatasetName != null)
                                                            {
                                                            if (pTargetWorkspace.Type != esriWorkspaceType.esriFileSystemWorkspace)
                                                            {
                                                            //1.判断要素数据集是否存在，存在则赋值，不存在则创建
                                                            if (((IWorkspace2)pTargetWorkspace).get_NameExists(esriDatasetType.esriDTFeatureDataset, strFeatureDatasetName))
                                                            {
                                                            pFeatureDataset = ((IFeatureWorkspace)pTargetWorkspace).OpenFeatureDataset(strFeatureDatasetName);
                                                            }
                                                            else
                                                            {
                                                            pFeatureDataset = ((IFeatureWorkspace)pTargetWorkspace).CreateFeatureDataset(strFeatureDatasetName, pSR);
                                                            }
                                                            }
                                                            }
                                                            //3.创建图层
                                                            IFeatureClass pTargetFeatureClass = null;
                                                            IFields pTargetFields = new FieldsClass();
                                                            //点、线、面类型
                                                            pTargetFeatureClass = pWorkspaceFactory.CreateFeatureClass((IFeatureWorkspace)pTargetWorkspace, pFeatureDataset, pTargetFields, feaName);
                                                            return pTargetFeatureClass;
                                                            }
方法的参数列表
CreateFeatureClass()方法参数

参数名称	参数个数	参数类型和值
`pTargetWorkspace`	1个(必选)	目标工作空间
`pSR`	1个(必选)	参考系
`feaName`	1个(必选)	目标图层名
`strFeatureDatasetName`	1个(必选)	要素数据集名称
`feaType`	1个(必选)	数据类型
`bDeleteExistLayer`	1个(可选)	是否删除已存在图层