雷击程序（四）------创建要素类

    要素类创建可以通过Catalog手动创建，也可以用代码实现。用代码创建更加灵活。创建要素类需要有较高的权限，可以通过设置LicenseControl控件实现。

   

    也可以通过代码实现，如下所示：

    public void License() { IAoInitialize m_AoInitialize = new AoInitializeClass(); esriLicenseStatus pLicesestatus = (esriLicenseStatus)m_AoInitialize.IsProductCodeAvailable(esriLicenseProductCode.esriLicenseProductCodeEngineGeoDB); if (pLicesestatus == esriLicenseStatus.esriLicenseAvailable) { if (pLicesestatus != esriLicenseStatus.esriLicenseCheckedOut) pLicesestatus = (esriLicenseStatus)m_AoInitialize.Initialize(esriLicenseProductCode.esriLicenseProductCodeEngineGeoDB); else { System.Windows.Forms.MessageBox.Show("程序初始化失败"); } } else System.Windows.Forms.MessageBox.Show("没有程序运行许可"); }

    创建后的要素类各字段如下图所示：

   

    程序实现完整代码如下：

    /// <summary> /// 建立与sde的连接 /// </summary> /// <param name="server"></param> /// <param name="instance"></param> /// <param name="user"></param> /// <param name="password"></param> /// <param name="database"></param> /// <param name="version"></param> /// <returns></returns> public ESRI.ArcGIS.Geodatabase.IWorkspace SDEWorkspaceFromPropertySet(String server, String instance, String user, String password, String database, String version) { // Create and populate the property set ESRI.ArcGIS.esriSystem.IPropertySet propertySet = new ESRI.ArcGIS.esriSystem.PropertySetClass(); propertySet.SetProperty("SERVER", server); propertySet.SetProperty("INSTANCE", instance); propertySet.SetProperty("DATABASE", database); propertySet.SetProperty("USER", user); propertySet.SetProperty("PASSWORD", password); propertySet.SetProperty("VERSION", version); ESRI.ArcGIS.Geodatabase.IWorkspaceFactory2 workspaceFactory; workspaceFactory = (ESRI.ArcGIS.Geodatabase.IWorkspaceFactory2)new ESRI.ArcGIS.DataSourcesGDB.SdeWorkspaceFactoryClass(); IWorkspace ws = workspaceFactory.Open(propertySet, 0); return ws; } /// <summary> /// 创建要素类各字段 /// </summary> /// <param name="pFeatureWorkspace"></param> /// <param name="esriSRGeoNumber"></param> /// <param name="pFeatureClassName"></param> public void CreateFeatureClassFromFactory(IFeatureWorkspace pFeatureWorkspace, int esriSRGeoNumber, string pFeatureClassName) { //设置GeometryDef属性，给SHAPE字段使用 IGeometryDefEdit pGeomDef; pGeomDef = new GeometryDefClass(); pGeomDef.GeometryType_2 = esriGeometryType.esriGeometryPoint; ISpatialReferenceFactory2 pSpaRefFact2 = new SpatialReferenceEnvironmentClass(); IGeographicCoordinateSystem pGeoCoordSys = pSpaRefFact2.CreateGeographicCoordinateSystem(esriSRGeoNumber); // 4326 is esriSRGeoCS_WGS1984 ISpatialReference pSpatialReference = (ISpatialReference)pGeoCoordSys; // Set the domain on the coordinate system // This prevents the error, "The XY domain on the spatial reference is not set or invalid." ISpatialReferenceResolution pSpatialReferenceResolution = (ISpatialReferenceResolution)pSpatialReference; pSpatialReferenceResolution.ConstructFromHorizon(); pGeomDef.SpatialReference_2 = pSpatialReference; //新建字段 IFieldEdit pField; IFieldsEdit pFieldsEdit; pFieldsEdit = new FieldsClass(); //几何字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeGeometry; pField.GeometryDef_2 = pGeomDef; pField.Name_2 = "Shape"; pFieldsEdit.AddField(pField); //ID字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeInteger; pField.Name_2 = "ID"; pFieldsEdit.AddField(pField); //产生OID字段 pField = new FieldClass(); pField.Name_2 = "OBJECTID"; pField.Type_2 = esriFieldType.esriFieldTypeOID; pFieldsEdit.AddField(pField); //产生编号字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeInteger; pField.Name_2 = "NUMBER"; pFieldsEdit.AddField(pField); //产生日期字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeString; pField.Name_2 = "DATE"; pFieldsEdit.AddField(pField); //产生gpsTime字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeString; pField.Name_2 = "GPSTIME"; pFieldsEdit.AddField(pField); //产生强度字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeDouble; pField.Name_2 = "INTENSITY"; pFieldsEdit.AddField(pField); //产生陡度字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeDouble; pField.Name_2 = "STEEPNESS"; pFieldsEdit.AddField(pField); //产生误差字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeDouble; pField.Name_2 = "ERROR"; pFieldsEdit.AddField(pField); //产生定位方式字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeSmallInteger; pField.Name_2 = "LOCATIONPATTERN"; pFieldsEdit.AddField(pField); //产生省字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeString; pField.Name_2 = "PROVINCE"; pFieldsEdit.AddField(pField); //产生市字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeString; pField.Name_2 = "CITY"; pFieldsEdit.AddField(pField); //产生县字段 pField = new FieldClass(); pField.Type_2 = esriFieldType.esriFieldTypeString; pField.Name_2 = "COUNTY"; pFieldsEdit.AddField(pField); //返回新建的要素类 pFeatureWorkspace.CreateFeatureClass(pFeatureClassName, pFieldsEdit, null, null, esriFeatureType.esriFTSimple, "Shape", ""); } /// <summary> /// 判断工作空间中是否已经有要素类，有返回true，否则返回false /// </summary> /// <param name="pWorkspace">工作空间</param> /// <param name="pFeatureClassName">要素类名称</param> /// <returns></returns> public bool GetFeatureClass(IWorkspace pWorkspace, string pFeatureClassName) { IEnumDataset pEnumDataset = pWorkspace.get_Datasets(esriDatasetType.esriDTFeatureClass); IDataset pDataSet = pEnumDataset.Next(); while (pDataSet != null) { if (pDataSet.Name.IndexOf(pFeatureClassName) != -1) return true; pDataSet = pEnumDataset.Next(); } return false; } /// <summary> /// 要素类版本化 /// </summary> /// <param name="pFeatureClass">要素类名称</param> public void RegisterFeatureClass(IFeatureClass pFeatureClass) { try { IVersionedObject3 versionedObject = (IVersionedObject3)pFeatureClass; bool IsRegistered; bool IsMovingEditsToBase; versionedObject.GetVersionRegistrationInfo(out IsRegistered, out IsMovingEditsToBase); if (IsRegistered) { if (IsMovingEditsToBase) { //first unregister without compressing edits versionedObject.UnRegisterAsVersioned3(false); //then register as fully versioned versionedObject.RegisterAsVersioned3(true); } } else { //registering as fully versioned versionedObject.RegisterAsVersioned3(true); } } catch (Exception ex) { MessageBox.Show(ex.ToString(), "版本化冲突，请关闭Catelog数据库等，重试"); } } private void button1_Click(object sender, EventArgs e) { try { IWorkspace ws = SDEWorkspaceFromPropertySet(sdeServer, sdeInstance, sdeUser, sdePassword, sdeDatabase, sdeVersion); IFeatureWorkspace pFeatureWorkspace = ws as IFeatureWorkspace; //查看要素类是否已经建立 bool ExsitsTable = GetFeatureClass(ws, "lightningStroke"); if (ExsitsTable == true) { //已建立，不做操作 } else { //不存在，则建要素类，并版本化 // 4326 is esriSRGeoCS_WGS1984 CreateFeatureClassFromFactory(pFeatureWorkspace, 4326, "lightningStroke"); // 如果报错，关闭catelog等 IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass("lightningStroke"); RegisterFeatureClass(pFeatureClass); } MessageBox.Show("生成要素类成功！"); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } }