拓扑检查C++(ArcObject)

	bool ArcmapDataBase::checkLayerTopology(dan::Object<iDataPlugin::IPGLayer> layer, const dan::DString &featureDatasetname, const dan::DString &topologyName, const dan::DString &topologyRuleName)
{
	/*
	参数含义：layer :需要进行拓扑检查的图层  featureDatasetname :所需创建的要素数据集名称 topologyName: 表示新建的拓扑名称 topologyRuleName ：表示创建拓扑规则的名称;
	*/
	/*
	拓扑检查步骤：
	1. 新建要素数据集
	2. 导入要素类（单个/多个）
	3. 新建拓扑
	4. 添加拓扑规则
	5. 验证拓扑
	6. 导入拓扑图层
	*/
	//得到当前要素工作空间mdb
	IFeatureWorkspacePtr ipFeatureWorkspace = getWorkspace();  
	dan::Object<ArcmapLayer> aLayer = layer;
	//获取当前空间参照(get ISpatialReference)
	IFeatureClassPtr ipFeatureClass = aLayer->getFeatureClass();
	IGeoDatasetPtr ipGeoDataset = ipFeatureClass;
	ISpatialReferencePtr ipSpatialRefrence;
	ipGeoDataset->get_SpatialReference(&ipSpatialRefrence);  //得到空间参照SpatialReference

	//创建要素数据集---（1.判断要素类是否存在要素数据集--(1)存在便无需创建 (2)不存在时则需创建相应要素数据集
	IFeatureDatasetPtr ipFeatureDataset;
	ipFeatureClass->get_FeatureDataset(&ipFeatureDataset); //判断是否存在该数据集;
	if (ipFeatureDataset == nullptr)  
	{
		/*1. 创建要素数据集 */
		ipFeatureWorkspace->CreateFeatureDataset(_bstr_t((LPCTSTR)featureDatasetname.utf16()), ipSpatialRefrence, &ipFeatureDataset);		
		/*2. 导入要素类到要素数据集 */
		IDatasetContainerPtr ipDatasetContainer = ipFeatureDataset;
		IDatasetPtr ipInDataset = ipFeatureClass;      //ipFeatureClass为同一工作空间下的要素类;
		ipDatasetContainer->AddDataset(ipInDataset);
		/*3. 新建拓扑  */ 
		//相关变量定义
		ITopologyContainerPtr ipTopologyContainer = ipFeatureDataset; //将数据集存入iTopology--用于创建拓扑
		ITopologyPtr ipTopology; 
		double ipClusterTolerance;  //返回默认容差
		ipTopologyContainer->get_DefaultClusterTolerance(&ipClusterTolerance);
		ipTopologyContainer->CreateTopology(_bstr_t((LPCTSTR)topologyName.utf16()), ipClusterTolerance, -1, L"", &ipTopology);
		long featureId;
		dan::DString ipJoinLayerName = layer->layerName();
		IFeatureClassPtr ipJoinFeatureClass;
		ipFeatureWorkspace->OpenFeatureClass(_bstr_t((LPCTSTR)ipJoinLayerName.utf16()), &ipJoinFeatureClass);
		ipJoinFeatureClass->get_FeatureClassID(&featureId);
		IClassPtr ipClass = ipJoinFeatureClass;
		ipTopology->AddClass(ipClass,5, 1, 1, VARIANT_FALSE);  //添加参与拓扑的图层	
		/*3. 添加拓扑规则 */
		ITopologyRulePtr ipGapTopologyRule(CLSID_TopologyRule);  //空隙
		ipGapTopologyRule->put_OriginClassID(featureId);
		ipGapTopologyRule->put_TopologyRuleType(esriTRTAreaNoGaps);   //层内要素是否有空隙;
		ipGapTopologyRule->put_Name(_bstr_t((LPCTSTR)topologyRuleName.utf16())); //dstring转BSTR
		ipGapTopologyRule->put_AllOriginSubtypes(VARIANT_TRUE);
		ITopologyRuleContainerPtr ipTopologyRuleContainer = (ITopologyRuleContainerPtr)ipTopology;
		VARIANT_BOOL checkTopoRule;
		ipTopologyRuleContainer->get_CanAddRule(ipGapTopologyRule, &checkTopoRule);
		if (checkTopoRule == VARIANT_TRUE)
		{
			ipTopologyRuleContainer->AddRule(ipGapTopologyRule);  //添加拓扑规则;
		}
		else
		{
			return false;
		}
		/*4. 验证拓扑 */
		IGeoDatasetPtr ipCurGeoDataset = ipTopology;
		IEnvelopePtr ipEnvelope;
		ipCurGeoDataset->get_Extent(&ipEnvelope);
		IPolygonPtr ipPolygon(CLSID_Polygon);
		ISegmentCollectionPtr ipSegmentCollection = ipPolygon;
		ipSegmentCollection->SetRectangle(ipEnvelope);
		IPolygonPtr ipCurPolygon;
		ipTopology->get_DirtyArea(ipPolygon, &ipCurPolygon);
		if (ipCurPolygon != nullptr)
		{
			IEnvelopePtr ipAreaToValidate; 
			ipPolygon->get_Envelope(&ipAreaToValidate);
			IEnvelopePtr ipAreaEffectValidated;
			ipTopology->ValidateTopology(ipAreaToValidate, &ipAreaEffectValidated);
		}
        //验证规则是否实现
		if (ipSegmentCollection == nullptr)
		{
			return false;
		}
		else
		{
			return true;
		}
	}
	else
	{
		ITopologyContainerPtr ipTopologyContainer = ipFeatureDataset; //将数据集存入iTopology--用于创建拓扑
		ITopologyPtr ipTopology;
		double ipClusterTolerance;  //返回默认容差
		ipTopologyContainer->get_DefaultClusterTolerance(&ipClusterTolerance);
		ipTopologyContainer->CreateTopology(_bstr_t((LPCTSTR)topologyName.utf16()), ipClusterTolerance, -1, L"", &ipTopology);
		//添加参与拓扑的图层：
		long featureId;
		dan::DString ipJoinLayerName = layer->layerName();
		IFeatureClassPtr ipJoinFeatureClass;
		ipFeatureWorkspace->OpenFeatureClass(_bstr_t((LPCTSTR)ipJoinLayerName.utf16()), &ipJoinFeatureClass);
		ipJoinFeatureClass->get_FeatureClassID(&featureId);
		IClassPtr ipClass = ipJoinFeatureClass;
		ipTopology->AddClass(ipClass, 5, 1, 1, VARIANT_FALSE);  //添加参与拓扑的图层	
		/* 添加拓扑规则 */
		ITopologyRulePtr ipGapTopologyRule(CLSID_TopologyRule);
		ipGapTopologyRule->put_TopologyRuleType(esriTRTAreaNoGaps);   //层内要素不能有空隙
		ipGapTopologyRule->put_Name(_bstr_t((LPCTSTR)topologyRuleName.utf16())); //dstring转BSTR
		ipGapTopologyRule->put_OriginClassID(featureId);
		ipGapTopologyRule->put_AllOriginSubtypes(VARIANT_TRUE);
		ITopologyRuleContainerPtr ipTopologyRuleContainer = ipTopology;
		VARIANT_BOOL checkTopoRule;
		ipTopologyRuleContainer->get_CanAddRule(ipGapTopologyRule, &checkTopoRule);
		if (checkTopoRule == VARIANT_TRUE)                // 判断能否添加该规则
		{
			ipTopologyRuleContainer->AddRule(ipGapTopologyRule);  //添加拓扑规则;
		}
		else
		{
			return false;
		}
		/* 验证拓扑 */
		IGeoDatasetPtr ipCurGeoDataset = ipTopology;
		IEnvelopePtr ipEnvelope;
		ipCurGeoDataset->get_Extent(&ipEnvelope);
		IPolygonPtr ipPolygon(CLSID_Polygon);
		ISegmentCollectionPtr ipSegmentCollection = ipPolygon;
		ipSegmentCollection->SetRectangle(ipEnvelope);
		IPolygonPtr ipCurPolygon;
		ipTopology->get_DirtyArea(ipPolygon, &ipCurPolygon);
		if (ipCurPolygon != nullptr)
		{
			IEnvelopePtr ipAreaToValidate;
			ipPolygon->get_Envelope(&ipAreaToValidate);
			IEnvelopePtr ipAreaEffectValidated;
			ipTopology->ValidateTopology(ipAreaToValidate, &ipAreaEffectValidated);
		}
		//验证规则是否实现;
		if (ipSegmentCollection == nullptr)
		{
			return false;
		}
		else
		{
			return true;
		}
	}
	return false;

}

转载自：https://blog.csdn.net/Giser_D/article/details/82288107