GIS應(yīng)用開發(fā)課件：空間數(shù)據(jù)管理

GIS應(yīng)用開發(fā)DevelopingGISApplicationswithArcObjectsusingC#.NET

空間數(shù)據(jù)管理（6學(xué)時(shí)）本章內(nèi)容：GeoDatabase對(duì)象模型概述Workspace及相關(guān)對(duì)象Dataset對(duì)象表、對(duì)象類和要素類ROW，Object和Feature對(duì)象關(guān)系與關(guān)系類7.1GeoDatabase對(duì)象模型概述不同類型的空間數(shù)據(jù)：Geodatabase：Personal/Filegeodatabase、ArcSDEgeodatabaseArcInfocoveragesShapefileCADTIN…………在AO（AE）中，各種類型的空間數(shù)據(jù)都采用統(tǒng)一的對(duì)象模型—

Geodatabase數(shù)據(jù)模型進(jìn)行操作。RasterDatasetGeodatabase模型的主要對(duì)象如下：Workspace(工作空間)：代表一個(gè)Geodatabase或一個(gè)ArcInfocoverage工作空間或一個(gè)文件夾(內(nèi)有地理數(shù)據(jù)文件)。Dataset(數(shù)據(jù)集)：是任何數(shù)據(jù)的集合，可以是Table(表)、要素類等。GeoDataSet：是一個(gè)包含了地理數(shù)據(jù)的數(shù)據(jù)集。FeatureDataset(要素?cái)?shù)據(jù)集)：由要素類、幾何網(wǎng)絡(luò)和拓?fù)涞冉M成。Table：是數(shù)據(jù)庫(kù)中的一個(gè)二維表，它由Row(行)組成，其列屬性由字段集設(shè)置；Row是表中的一條記錄，一個(gè)表中的記錄的字段集是相同的。ObjectClass(對(duì)象類)：是Table的擴(kuò)展，它是一種具有面向?qū)ο筇匦缘谋?，用于存?chǔ)非空間數(shù)據(jù)；Object代表了一個(gè)具有屬性和行為的實(shí)體(entity)對(duì)象，而不是簡(jiǎn)單的Row，具有OID。FeatureClass(要素類)：是一種可以存儲(chǔ)空間數(shù)據(jù)的對(duì)象類，它是對(duì)象類的擴(kuò)展，其定義中包含幾何字段；Feature(要素)是要素類中的一條記錄，它是一個(gè)有幾何字段的對(duì)象。RelationshipClass(關(guān)系類)：定義兩個(gè)不同的要素類或?qū)ο箢愔g的關(guān)聯(lián)關(guān)系；Relationship代表關(guān)系類中對(duì)象之間、要素之間或?qū)ο笠刂g的聯(lián)系，它可以控制這些對(duì)象之間的行為。AttributedRelationshipClass(屬性關(guān)系類)：是一種用于存儲(chǔ)關(guān)系的表；AttributedRelationship為屬性關(guān)系類中的數(shù)據(jù)。7.2Workspace及相關(guān)對(duì)象在Geodatabase數(shù)據(jù)模型中，一個(gè)工作空間對(duì)應(yīng)于一個(gè)geodatabase或一個(gè)ArcInfo

coverage工作空間或一個(gè)文件夾（內(nèi)有地理數(shù)據(jù)文件）。工作空間是空間數(shù)據(jù)集與非空間數(shù)據(jù)集的容器。由esriWorkspaceType枚舉類型指定的Workspace有三種類型：esriFileSystemWorkspace：基于文件類型的Shapefiles和ArcInfo的工作空間esriLocalDatabaseWorkspace：Personal/FilegeodatabaseesriRemoteDatabaseWorkspace：ArcSDEgeodatabase其它workspace類型包括：RasterWorkspace：包含格網(wǎng)和影像數(shù)據(jù)的工作空間；TinWorkspace：包含TINs的工作空間；CADWorkspace：包含CAD數(shù)據(jù)的工作空間；VPFWorkspace：包含VPF數(shù)據(jù)的工作空間。7.2.1

工作空間工廠(WorkspaceFactory)要操作各種類型的空間數(shù)據(jù)，首先要獲得空間數(shù)據(jù)所在的工作空間。Workspace（工作空間）是一個(gè)普通類（Class），這意味著用戶不能直接新建它。為了獲得一個(gè)工作空間，需要使用WorkspaceFactory對(duì)象來創(chuàng)建或打開一個(gè)Workspace。WorkspaceFactory是Geodatabase的入口。它是一個(gè)抽象類，派生了很多的子類，例如SdeWorkspaceFactory，

AccessWorkspaceFactory，ShapefileWorkspaceFactory

，

FileGDBWorkspaceFactory等。不同類型的空間數(shù)據(jù)需要不同的工作空間工廠對(duì)象來打開對(duì)應(yīng)的工作空間。不同類型的空間數(shù)據(jù)需要不同的工作空間工廠對(duì)象來打開對(duì)應(yīng)的工作空間。

ClassesthatimplementIWorkspaceFactoryClassesAccessWorkspaceFactory(esriDataSourcesGDB)AMSWorkspaceFactory(esriTrackingAnalyst)ArcInfoWorkspaceFactory(esriDataSourcesFile)CadWorkspaceFactory(esriDataSourcesFile)ExcelWorkspaceFactory(esriDataSourcesOleDB)FileGDBWorkspaceFactory(esriDataSourcesGDB)GeoRSSWorkspaceFactory(esriDataSourcesFile)IMSWorkspaceFactory(esriGISClient)InMemoryWorkspaceFactory(esriDataSourcesGDB)NetCDFWorkspaceFactory(esriDataSourcesNetCDF)OLEDBWorkspaceFactory(esriDataSourcesOleDB)PCCoverageWorkspaceFactory(esriDataSourcesFile)PlugInWorkspaceFactoryRasterWorkspaceFactory(esriDataSourcesRaster)SDCWorkspaceFactory(esriDataSourcesFile)SdeWorkspaceFactory(esriDataSourcesGDB)ShapefileWorkspaceFactory(esriDataSourcesFile)SqlWorkspaceFactory(esriDataSourcesGDB)StreetMapWorkspaceFactory(esriDataSourcesFile)TextFileWorkspaceFactory(esriDataSourcesOleDB)TinWorkspaceFactory(esriDataSourcesFile)ToolboxWorkspaceFactory(esriGeoprocessing)VpfWorkspaceFactory(esriDataSourcesFile)IWorkspaceFactory接口定義了所有工作空間工廠對(duì)象的一般屬性和方法，用戶可以通過它管理不同類型的工作空間，所有的工作空間對(duì)象都可以通過這個(gè)接口產(chǎn)生。IWorkspaceFactory

使用IWorkspaceFactory.Create方法可以用于新建一個(gè)工作空間名稱對(duì)象。publicIWorkspaceNameCreate(

stringparentDirectory,

stringName,

IPropertySetConnectionProperties,

inthWnd

);IWorkspaceFactory.Open方法和IWorkspaceFactory.OpenFromFile方法可以用于打開一個(gè)已經(jīng)存在的工作空間。publicIWorkspaceOpen(IPropertySetConnectionProperties,inthWnd);publicIWorkspaceOpenFromFile(stringfileName,inthWnd);IWorkspaceFactory.WorkspaceType屬性可以返回工作空間的類型。HowtocreatenewgeodatabasesCreatingapersonalgeodatabaseworkspacestoredinAccessprivatevoidCreateAccessWorkspace(){IWorkspaceFactorypAccessWorkspaceFactory=newAccessWorkspaceFactoryClass();IWorkspaceName

pWorkspaceName=pAccessWorkspaceFactory.Create(@"d:\temp","test.mdb",null,0);ESRI.ArcGIS.esriSystem.INamename=(IName)pWorkspaceName;IWorkspacepGDB_Wor=(IWorkspace

)name.Open(); }publicIWorkspaceNameCreate(

stringparentDirectory,

stringName,

IPropertySetConnectionProperties,

inthWnd);Creatingafilegeodatabaseworkspace//Createafilegeodatabaseworkspacefactory.IWorkspaceFactoryworkspaceFactory=newFileGDBWorkspaceFactoryClass();//Createanewfilegeodatabase.IWorkspaceNameworkspaceName=workspaceFactory.Create("C:\\temp\\","MyFGDB.gdb",null,0);INamename=(IName)workspaceName;//Openareferencetothefilegeodatabaseworkspacethroughthenameobject.IWorkspacefGDB_Wor=(IWorkspace)name.Open();publicstaticIWorkspaceCreateFileGdbWorkspace(Stringpath)

{TypefactoryType=Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBWorkspaceFactory");

IWorkspaceFactoryworkspaceFactory=(IWorkspaceFactory)Activator.CreateInstance(factoryType);

IWorkspaceNameworkspaceName=workspaceFactory.Create

(path,"Sample.gdb",null,0);

INamename=(IName)workspaceName;

IWorkspaceworkspace=(IWorkspace)name.Open();returnworkspace;

}publicIWorkspaceNameCreate(

stringparentDirectory,

stringName,

IPropertySet

ConnectionProperties,

inthWnd);Creatingaconnectionfile(.sde)toanEnterpriseArcSDEworkspacepublicIWorkspaceNameopen_ArcSDE_Workspace

(stringserver,stringinstance,stringuser,stringpassword,stringdatabase,stringversion){IPropertySetpropertySet=newPropertySetClass();propertySet.SetProperty("SERVER",server);propertySet.SetProperty("INSTANCE",instance);propertySet.SetProperty("DATABASE",database);propertySet.SetProperty("USER",user);propertySet.SetProperty("PASSWORD",password);propertySet.SetProperty("VERSION",version);

IWorkspaceFactory2workspaceFactory=(IWorkspaceFactory2)newSdeWorkspaceFactoryClass();returnworkspaceFactory.Create("d:\\temp\\","myconnection.sde",propertySet,0);}publicIWorkspaceNameCreate(

stringparentDirectory,

stringName,

IPropertySetConnectionProperties,

inthWnd);CreatingageodatabaseinapersonalorworkgroupArcSDEworkspace//Createadataservermanagerobject.IDataServerManagerdataserverManager=newDataServerManagerClass();//Settheservernameandconnecttotheserver.dataserverManager.ServerName="tivo\\sqlexpress";dataserverManager.Connect();//Openoneofthegeodatabasesinthedatabaseserver.IDataServerManagerAdmindataservermanagerAdmin=(IDataServerManagerAdmin)dataserverManager;IWorkspaceNameworkspaceName=dataservermanagerAdmin.CreateWorkspaceName("sewer","VERSION","dbo.Default");INamename=(IName)workspaceName;IWorkspaceGDB_wor=(IWorkspace)name.Open();Howtoconnecttoageodatabase有3種不同的方法打開工作空間：IWorkspaceFactory.Open

publicIWorkspace

Open(IPropertySetConnectionProperties,inthWnd);IWorkspaceFactory.OpenFromFile

publicIWorkspace

OpenFromFile(string

fileName,inthWnd);IWorkspaceFactory2.OpenFromStringpublicIWorkspace

OpenFromString(

string

connectStr,

inthWnd);Theconnectstringisacollectionofnamevaluepairsseparatedbyasemicolon(;).thepathnameofafileordirectorythatrepresentseitheraFileSystemWorkspaceorLocalDatabaseWorkspace,oraconnectionfiletoaRemoteDatabaseworkspaceThehWndargumentistheparentwindoworapplication'swindow.ThehWndwillguaranteethattheconnectiondialog,ifpresentedtoyoubecauseofinsufficientproperties,hasthecorrectparent.（1）打開PersonalGeoDatabae數(shù)據(jù)庫(kù)//Forexample,database="C:\\myData\\mypGDB.mdb".

publicIWorkspaceopen_pGDB_Workspace(stringdatabase)

{IPropertySetpropertySet=newPropertySetClass();propertySet.SetProperty("DATABASE",database);

IWorkspaceFactoryworkspaceFactory=newAccessWorkspaceFactoryClass();returnworkspaceFactory.Open(propertySet,0);}publicIWorkspace

Open(IPropertySet

ConnectionProperties,

inthWnd);//Forexample,fileName="C:\\myData\\mypGDB.mdb".publicIWorkspaceopenFromFilepGDBWorkspace(stringfileName){IWorkspaceFactoryworkspaceFactory=newAccessWorkspaceFactoryClass();returnworkspaceFactory.OpenFromFile(fileName,0);}publicIWorkspaceOpenFromFile(stringfileName,

inthWnd);//Forexample,connectionString="DATABASE=C:\\myData\\mypGDB.mdb".publicIWorkspaceopenFromStringpGDBWorkspace(stringconnectionString){IWorkspaceFactory2workspaceFactory=(IWorkspaceFactory2)newAccessWorkspaceFactoryClass();returnworkspaceFactory.OpenFromString(connectionString,0);}publicIWorkspaceOpenFromString(stringconnectStr,

inthWnd);"SERVER=myServer;DATABASE=sde;INSTANCE=5151;USER=Editor;PASSWORD=Editor;VERSION=SDE.DEFAULT"（2）Connectingtoafilegeodatabaseworkspace//Forexample,database="C:\\myData\\myfGDB.gdb".publicIWorkspaceopen_fGDB_Workspace(stringdatabase){IPropertySetpropertySet=newPropertySetClass();propertySet.SetProperty("DATABASE",database);IWorkspaceFactoryworkspaceFactory=newFileGDBWorkspaceFactoryClass();returnworkspaceFactory.Open(propertySet,0);}publicIWorkspaceOpen(IPropertySet

ConnectionProperties,

inthWnd);//Forexample,fileName="C:\\myData\\myfGDB.gdb".publicIWorkspaceopenFromFile_fGDB_Workspace(StringfileName){IWorkspaceFactoryworkspaceFactory=newFileGDBWorkspaceFactoryClass();returnworkspaceFactory.OpenFromFile(fileName,0);}publicIWorkspaceOpenFromFile(stringfileName,

inthWnd);//Forexample,connectionString="DATABASE=C:\\myData\\myfGDB.gdb".publicIWorkspaceopenFromString_fGDB_Workspace(stringconnectionString){

IWorkspaceFactory2workspaceFactory=(IWorkspaceFactory2)newFileGDBWorkspaceFactoryClass();returnworkspaceFactory.OpenFromString(connectionString,0);}

publicIWorkspaceOpenFromString(stringconnectStr,

inthWnd);"SERVER=myServer;DATABASE=sde;INSTANCE=5151;USER=Editor;PASSWORD=Editor;VERSION=SDE.DEFAULT"（3）ConnectingtoanenterpriseArcSDEgeodatabaseworkspacepublicIWorkspaceopen_ArcSDE_Workspace(stringserver,stringinstance,stringuser,stringpassword,stringdatabase,stringversion)

{IPropertySetpropertySet=newPropertySetClass();propertySet.SetProperty("SERVER",server);propertySet.SetProperty("INSTANCE",instance);propertySet.SetProperty("DATABASE",database);propertySet.SetProperty("USER",user);propertySet.SetProperty("PASSWORD",password);propertySet.SetProperty("VERSION",version);

IWorkspaceFactoryworkspaceFactory=newSdeWorkspaceFactoryClass();returnworkspaceFactory.Open(propertySet,0);}（4）打開Shapefile工作空間publicIWorkspaceOpenShapfileWorkspace

(stringLocation){

IWorkspaceFactorywsf=newShapefileWorkspaceFactoryClass();

IWorkspacews=wsf.OpenFromFile(Location,0); returnws;}7.2.2

工作空間(Workspace)Workspace實(shí)現(xiàn)的主要接口如下表所示.InterfacesDescriptionIDatasetContainer3Providesaccesstoaddingdatasetstothedatasetcontainer.IFeatureWorkspaceProvidesaccesstomembersthatcreateandopenvarioustypesofdatasetsandotherworkspacelevelobjects.IFeatureWorkspaceSchemaEditProvidesaccesstoalteringtheinstanceCLSIDandtheclassextensionCLSID.ITopologyWorkspaceProvidesaccesstomembersthataccessthetopologiesinaworkspace.ITransactionsProvidesaccesstomembersthatcontrolTransactionmanagement.ITransactionsOptionsProvidesaccesstomembersthatcontrolTransactionoptions.IWorkspace2Providesaccesstomembersthathaveinformationabouttheworkspace.IWorkspaceConfigurationProvidesaccesstoconfigurationkeywords.IWorkspaceDomainsProvidesaccesstomembersthatreturninformationaboutdomainsandallowsyoutoaddordeletedomains.IWorkspaceDomains2Providesaccesstomembersthatallowyoutoalteradomain.IWorkspaceEditProvidesaccesstomembersthatcontrolWorkspaceEditing.IWorkspaceReplicaDatasetsProvidesaccesstomembersthatreturnalistofreplicadatasets.IWorkspaceReplicasProvidesaccesstomembersthatreturnobjectscontaininginformationaboutreplicas.IWorkspaceReplicasAdmin3Providesaccesstomembersthatmodifyinformationaboutareplica.IWorkspace接口IWorkspace接口定義了一個(gè)工作空間最普通的屬性和方法。

ConnectionProperties返回工作空間的連接屬性集對(duì)象；Datasets屬性可以按照數(shù)據(jù)集(Dataset)的類型而返回一個(gè)數(shù)據(jù)集枚舉對(duì)象；Type和WorkspaceFactory屬性則可以分別返回工作空間的類型和工作空間工廠的種類。publicIEnumDataset

get_Datasets(esriDatasetType

DatasetType);該方法按照數(shù)據(jù)集(Dataset)的類型返回一個(gè)數(shù)據(jù)集枚舉對(duì)象；當(dāng)數(shù)據(jù)集類型為esriDTAny，該方法將返回工作空間中的所有數(shù)據(jù)集。注意：該方法只返回工作空間中頂層的數(shù)據(jù)集；假如一個(gè)工作空間中有一個(gè)獨(dú)立的要素類和另一個(gè)位于要素?cái)?shù)據(jù)集中的要素類，使用該方法時(shí)，數(shù)據(jù)集類型參數(shù)為esriDTFeatureClass，那么僅返回那個(gè)獨(dú)立的要素類，位于要素?cái)?shù)據(jù)集中的要素類不會(huì)返回。esriDatasetTypeConstantsConstantValueDescriptionesriDTAny1AnyDataset.esriDTContainer2AnyContainerDataset.esriDTGeo3AnyGeoDataset.esriDTFeatureDataset4FeatureDataset.esriDTFeatureClass5FeatureClass.esriDTPlanarGraph6PlanarGraph.esriDTGeometricNetwork7GeometricNetwork.esriDTTopology8Topology.esriDTText9TextDataset.esriDTTable10TableDataset.esriDTRelationshipClass11RelationshipClass.esriDTRasterDataset12RasterDataset.esriDTRasterBand13RasterBand.esriDTTin14TinDataset.esriDTCadDrawing15CadDrawingDataset.ConstantValueDescriptionesriDTRasterCatalog16RasterCatalog.esriDTToolbox17Toolbox.esriDTTool18Tool.esriDTNetworkDataset19NetworkDataset.esriDTTerrain20Terraindataset.esriDTRepresentationClass21FeatureClassRepresentation.esriDTCadastralFabric22CadastralFabric.esriDTSchematicDataset23SchematicDataset.esriDTLocator24AddressLocator.esriDTMap26Map.esriDTLayer27Layer.esriDTStyle28Style.esriDTMosaicDataset29MosaicDataset.esriDTLasDataset30LasDataset.//拷貝數(shù)據(jù)庫(kù)模式：包括屬性域、要素?cái)?shù)據(jù)集、要素類（包括要素?cái)?shù)據(jù)集中的要素類和獨(dú)立的要素類）、表

privatevoidCreateSchema(){CopyDomains(sourceWorkspace,targetWorkspace);

IEnumDatasetsourceFeatureDatasets=sourceWorkspace.get_Datasets(esriDatasetType.esriDTFeatureDataset);CreateFeatureDatasetsAndFeatureClasses(sourceFeatureDatasets);

IEnumDatasetfeatureClasses=sourceWorkspace.get_Datasets(esriDatasetType.esriDTFeatureClass);CreateFeatureClassesInWorkspace(featureClasses);

IEnumDatasettables=sourceWorkspace.get_Datasets(esriDatasetType.esriDTTable);CreateTablesInWorkspace(tables);}IFeatureWorkspace接口主要用于管理基于要素的數(shù)據(jù)集，如表（Table）、對(duì)象類（ObjectClass）、要素類（FeatureClass）、要素?cái)?shù)據(jù)集（FeatureDataset）和關(guān)系類（RelationshipClass）等。privatevoidmnuAddFeatureClassToMap_Click(objectsender,System.EventArgse){

IWorkspaceFactorywsf=newShapefileWorkspaceFactoryClass();

IFeatureWorkspacepFeatWorkspace=wsf.OpenFromFile(@"D:\ArcTutor\usa",0)asIFeatureWorkspace;

IFeatureClasspFeatClass=pFeatWorkspace.OpenFeatureClass("counties");

IFeatureLayerpFeatLyr=newFeatureLayerClass(); pFeatLyr.FeatureClass=pFeatClass; pFeatLyr.Name=pFeatClass.AliasName;

IMappMap=axMapControl1.Map; pMap.AddLayer(pFeatLyr);}7.2.3PropertySetPropertyset對(duì)象是一個(gè)專門用于設(shè)置屬性的對(duì)象，它是一種name-value對(duì)的集合。屬性名必須是字符串，屬性值可以是字符串、數(shù)值或日期，也可以是一個(gè)對(duì)象。屬性值支持通過名字來查找屬性的方法。IWorkspaceFactory.Open方法要求用Propertyset（屬性集合）來設(shè)置打開一個(gè)Workspace。如打開一個(gè)SDE數(shù)據(jù)庫(kù)的時(shí)候，進(jìn)行如下配置：IPropertySetpPropertyset=newPropertySetClass();pPropertyset.SetProperty("Server","data");//服務(wù)器pPropertyset.SetProperty("Instance","esrisde");//SDE實(shí)例pPropertyset.SetProperty("user","sde");//SDE數(shù)據(jù)庫(kù)的用戶名pPropertyset.SetProperty("password","sde");//SDE數(shù)據(jù)庫(kù)的密碼pPropertyset.SetProperty("version","sde.DEFAULT");//'默認(rèn)版本7.2.4名稱對(duì)象名稱（Name）對(duì)象標(biāo)識(shí)并且定義了Geodatabase對(duì)象（如數(shù)據(jù)集或者工作空間）或地圖對(duì)象（如圖層）。盡管名稱對(duì)象只是它代表的對(duì)象的一個(gè)“代理”，但它支持程序員使用實(shí)例化的特定對(duì)象的Open方法。下面是一個(gè)使用Open方法實(shí)例化的例子：

INamepName=pFeatureClassNameasIName;

IFeatureClasspFeatureClass=pName.Open()asIFeatureClass;名稱對(duì)象的子類眾多，如TableName、FeatureClassName、ObjectClassName等。7.3Dataset對(duì)象所有放在工作空間(Workspace)中的對(duì)象都是一種數(shù)據(jù)集(Dataset)對(duì)象。Dataset對(duì)象分為兩大類一種是Table，可以簡(jiǎn)單看成是一張二維表，它是由一條條記錄組成的，是保存記錄Row的容器；一種是GeoDataset，地理數(shù)據(jù)集，如要素?cái)?shù)據(jù)集、柵格數(shù)據(jù)集。IDataset接口定義的屬性、方法如右圖所示：7.3.1GeoDataset類GeoDataset（地理數(shù)據(jù)集）是一個(gè)抽象類，它代表了擁有空間屬性的數(shù)據(jù)集。GeoDataset的例子包括要素?cái)?shù)據(jù)集FeatureDataset、要素類FeatureClass、TIN和柵格數(shù)據(jù)集RasterDataset等。非GeoDataset的數(shù)據(jù)集包括Table、對(duì)象類ObjectClass和關(guān)系類RelationshipClass等。IGeoDataset接口定義了GeoDataset對(duì)象的空間信息，包括空間參考和范圍屬性。通過IGeoDataset.SpatialRefrence可以獲得一個(gè)GeoDataset對(duì)象的空間參考，IGeoDataset.Extent則可以獲得要素集的范圍。IGeoDatasetSchemaEdit接口可以讓程序員去改變一個(gè)GeoDataset的空間參考，IGeoDatasetSchemaEdit.AlterSpatialRefrence方法重新設(shè)置與數(shù)據(jù)集關(guān)聯(lián)的空間參考。這個(gè)方法多使用于給一個(gè)空間參考為Unknown的地理數(shù)據(jù)集設(shè)置空間參考。IGeoDatasetSchemaEdit.CanAlterSpatialReferenceIndicatesifthespatialreferenceofthedatasetcanbealtered.改變一個(gè)圖層的空間參考privatevoidAlterSpatialReferrenc(

IMappMap,IFeatureLayerfeaturelayer)

{IActiveViewpActiveView=pMapasIActiveView;

IFeatureClasspFeatureClass=featurelayer.FeatureClass;

IGeoDatasetpGeoDataset=pFeatureClassasIGeoDataset;

IGeoDatasetSchemaEditpGeoDatasetEdit=pGeoDatasetasIGeoDatasetSchemaEdit;

????????????????if(pGeoDatasetEdit.CanAlterSpatialReference==true)

{ISpatialReferenceFactory2pSpatRefFact=newSpatialReferenceEnvironmentClass();

IGeographicCoordinateSystempGeoSys=pSpatRefFact.CreateGeographicCoordinateSystem(4214);//esriSRGeoCSType.esriSRGeoCS_Beijing1954pGeoDatasetEdit.AlterSpatialReference(pGeoSys);

}pActiveView.Refresh();

}7.3.2FeatureDataset對(duì)象要素?cái)?shù)據(jù)集對(duì)象是具有相同空間參考的要素類的容器。使用要素?cái)?shù)據(jù)集的情況十分廣泛，例如幾何網(wǎng)絡(luò)、拓?fù)潢P(guān)系必須建立在一個(gè)要素?cái)?shù)據(jù)集中。在工作空間中對(duì)一個(gè)要素類進(jìn)行編程的時(shí)候，需要注意這個(gè)要素類放在什么地方，是直接放在工作空間中（這種要素類被稱為standalonefeatureclass），還是放在一個(gè)要素?cái)?shù)據(jù)集中。當(dāng)使用IWorkspace.Datasets屬性來遍歷一個(gè)工作空間內(nèi)的數(shù)據(jù)集時(shí)，返回的只是直接放在工作空間的數(shù)據(jù)集，而保存在一個(gè)要素?cái)?shù)據(jù)集中的要素類則不會(huì)被遍歷。使用IFeatureWorkspace.OpenFeatureClass打開工作空間中的任何一個(gè)要素類，無論它是直接存放在工作空間還是存放在工作空間中的一個(gè)要素?cái)?shù)據(jù)集中。IFeatureDataset這個(gè)接口是從IDataset接口繼承而來的。使用IFeatureDataset.CreateFeatureClass方法可以用來在要素?cái)?shù)據(jù)集中創(chuàng)建一個(gè)新的要素類。這個(gè)方法和IFeatureWorkspace.CreateFeaureClass的方法類似。新建要素類的空間參考是通過它的幾何字段來設(shè)置的。

IEnumDatasetsourceFeatureDatasets=sourceWorkspace.get_Datasets(esriDatasetType.esriDTFeatureDataset);privatevoidCreateFeatureDatasetsAndFeatureClasses(IEnumDatasetsourceFeatureDatasets){if(sourceWorkspace==null||targetWorkspace==null)return;

ISpatialReferencespatialRference;sourceFeatureDatasets.Reset();

IDatasetdataset=sourceFeatureDatasets.Next();while(dataset!=null){IGeoDatasetgeoDataset=datasetasIGeoDataset;spatialRference=geoDataset.SpatialReference;

IFeatureDatasetsourceFeatureDataset=datasetasIFeatureDataset;

IFeatureWorkspacefeatureWorkspace=targetWorkspaceasIFeatureWorkspace;if((IWorkspace2)targetWorkspace).get_NameExists

(esriDatasetType.esriDTFeatureDataset,((IDataset)sourceFeatureDataset).Name))dataset=sourceFeatureDatasets.Next();IFeatureDatasettargetFeatureDataset=featureWorkspace.CreateFeatureDataset(dataset.Name,spatialRference);CreateFeatureClassesInDataset

(sourceFeatureDataset,targetFeatureDataset);dataset=sourceFeatureDatasets.Next();}}publicbool

get_NameExists(

esriDatasetTypeType,

stringName

);//創(chuàng)建要素?cái)?shù)據(jù)集中的要素類、拓?fù)潢P(guān)系publicvoidCreateFeatureClassesInDataset(IFeatureDatasetsourceFeatureDataset,IFeatureDatasettargetFeatureDataset){if(sourceFeatureDataset==null||targetFeatureDataset==null)return;

IEnumDatasetdatasets=sourceFeatureDataset.Subsets;

IDatasetsourceDataset=datasets.Next();while(sourceDataset!=null){switch(sourceDataset.Type){case

esriDatasetType.esriDTFeatureClass:

if(((IWorkspace2)targetWorkspace).get_NameExists

(esriDatasetType.esriDTFeatureClass,sourceDataset.Name))break;

IFeatureClasssourceFeatureClass=sourceDatasetasIFeatureClass;

CreateFeatureClassInThisDataset(sourceFeatureClass,targetFeatureDataset);break;case

esriDatasetType.esriDTNetworkDataset:

INetworkDatasetsourceNetworkDataset=sourceDatasetasINetworkDataset;

CreateNetworkDataset(sourceFeatureDataset,targetFeatureDataset);break;case

esriDatasetType.esriDTRelationshipClass:

CreateRelationshipClassSchema(sourceFeatureDataset,targetFeatureDataset);break;case

esriDatasetType.esriDTTopology:

CreateTopology(sourceFeatureDataset,targetFeatureDataset);break;default:break;}sourceDataset=datasets.Next();}

}IFeatureClassContainerIFeatureClassContainer接口用于管理要素?cái)?shù)據(jù)集中的要素類。該接口的ClassByName和Class(index)等屬性都可以用來獲取數(shù)據(jù)集中的特定的要素類。IFeatureClassContainer.ClassCount和Classes屬性分別可以獲得要素?cái)?shù)據(jù)集中的要素類的數(shù)目和得到一個(gè)要素類的枚舉對(duì)象。IFeatureClassContainer.ClassByID屬性可以讓程序員通過對(duì)象類的ID值返回一個(gè)特定的對(duì)象類。publicvoidCreateFeatureClassesInDataset(

IFeatureDataset

sourceFeatureDataset,IFeatureDatasettargetFeatureDataset){IFeatureClassContainersourceFeatureClassContainer=sourceFeatureDatasetasIFeatureClassContainer;

for(inti=0;i<sourceFeatureClassContainer.ClassCount;i++)

{

IFeatureClasssourceFeatureClass=sourceFeatureClassContainer.get_Class(i);CreateFeatureClassInThisDataset(sourceFeatureClass,targetFeatureDataset);

}

}IRelationshipClassContainer接口要素?cái)?shù)據(jù)集中還可以存儲(chǔ)關(guān)系類對(duì)象，可以通過這個(gè)接口來添加、新建和獲得要素?cái)?shù)據(jù)集中的關(guān)系類對(duì)象。IRelationshipClassContainer.CreateRelationshipClass方法可以讓程序員在要素?cái)?shù)據(jù)集中新建一個(gè)關(guān)系類。publicIRelationshipClass

CreateRelationshipClass(string

relClassName,

IObjectClass

OriginClass,

IObjectClass

DestinationClass,

string

forwardLabel,

string

backwardLabel,

esriRelCardinality

Cardinality,

esriRelNotification

Notification,

bool

IsComposite,

bool

IsAttributed,

IFields

relAttrFields,

string

OriginPrimaryKey,

string

destPrimaryKey,

string

OriginForeignKey,

string

destForeignKey);privatevoidCreateRelationshipClassSchema

(IFeatureDataset

sourceFeatureDataset,IFeatureDatasettargetFeatureDataset){

IRelationshipClassContainerfromRelClsContainer=sourceFeatureDatasetasIRelationshipClassContainer;

IRelationshipClassContainertoRelClsContainer=targetFeatureDatasetasIRelationshipClassContainer;

IFeatureWorkspacetargetFeatureWorkspace=targetWorkspaceasIFeatureWorkspace;

IEnumRelationshipClassfromRelClasses=fromRelClsContainer.RelationshipClasses;

fromRelClasses.Reset();

IRelationshipClassfromRelClass=fromRelClasses.Next();while(fromRelClass!=null){

stringfromRelClsName=(fromRelClassasIDataset).Name;

esriRelCardinalityfromRelCardinality=fromRelClass.Cardinality;

stringfromFwdPathLabel=fromRelClass.ForwardPathLabel;

stringfromBwdPathLabel=fromRelClass.BackwardPathLabel;

IObjectClassfromOriginCls=fromRelClass.OriginClass;

stringfromOriginPK=fromRelClass.OriginPrimaryKey;

stringfromOriginFK=fromRelClass.OriginForeignKey;

IObjectClassfromDesCls=fromRelClass.DestinationClass;

stringfromDesPK=fromRelClass.DestinationPrimaryKey;

stringfromDesFK=fromRelClass.DestinationForeignKey;

boolfromIsAttributed=fromRelClass.IsAttributed;

boolfromIsComposite=fromRelClass.IsComposite;

esriRelNotificationfromRelNotif=fromRelClass.Notification;

IObjectClasstoOriginCls=null;if(fromOriginClsisIFeatureClass)toOriginCls=targetFeatureWorkspace.OpenFeatureClass(((IDataset)fromOriginCls).Name);elseif(fromOriginClsisITable)toOriginCls=targetFeatureWorkspace.OpenTable(((IDataset)fromOriginCls).Name)asIObjectClass;

IObjectClasstoDesCls=null;if(fromDesClsisIFeatureClass)toDesCls=targetFeatureWorkspace.OpenFeatureClass(((IDataset)fromDesCls).Name);elseif(fromOriginClsisITable)toDesCls=targetFeatureWorkspace.OpenTable(((IDataset)fromDesCls).Name)asIObjectClass;toRelClsContainer.CreateRelationshipClass(fromRelClsName,toOriginCls,toDesCls,fromFwdPathLabel,fromBwdPathLabel,fromRelCardinality,fromRelNotif,fromIsComposite,fromIsAttributed,null,fromOriginPK,"",fromOriginFK,"");fromRelClass=fromRelClasses.Next();}}ITopologyContainer2

–拓?fù)潢P(guān)系publicITopology

CreateTopology(string

Name,

double

ClusterTolerance,

int

maxGeneratedErrorCount,

string

ConfigurationKeyword

);ITopologypublicvoidAddClass(IClass

classToAdd,

doubleWeight,

intXYRank,

intZRank,

boolEventNotificationOnValidate);//拷貝拓?fù)潢P(guān)系

privatevoidCreateTopology(IFeatureDatasetsourceFeatureDataset,IFeatureDatasettargetFeatureDataset){

IFeatureWorkspaceManage2sourceWsManage=sourceWorkspaceasIFeatureWorkspaceManage2;

IFeatureWorkspacetargetFeatureWorkspace=targetWorkspaceasIFeatureWorkspace;

ITopologyContainertoTopoContainer=(ITopologyContainer)targetFeatureDataset;

ITopologyContainerfromTopoContainer=(ITopologyContainer)sourceFeatureDataset;

inttopoCount=fromTopoContainer.TopologyCount;

ITopologyfromTopology;ITopologytoTopology;for(inti=0;i<topoCount;i++){fromTopology=fromTopoContainer.get_Topology(i);

stringtopologyName=(fromTopologyasIDataset).Name;toTopology=toTopoContainer.CreateTopology(topologyName,toTopoContainer.DefaultClusterTolerance,-1,"");

ITopologyPropertiesfromTopoProps=fromTopologyasITopologyProperties;

IEnumFeatureClassfromTopoClasses=fromTopoProps.Classes;IFeatureClassfromFeatureClass=fromTopoClasses.Next();while(fromFeatureClass!=null){ITopologyClassfromTopoClass=fromFeatureClassasITopologyClass;

IFeatureClasstoFeatureClass=targetFeatureWorkspace.OpenFeatureClass(((IDat