打开shpfile，mdb，sde工作空间

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打开shapefile工作空间：

 ESRI.ArcGIS.Geodatabase.IWorkspaceFactory wsf = new ESRI.ArcGIS.DataSourcesFile.ShapefileWorkspaceFactory();

 IWorkspace ws = wsf.OpenFromFile(Application.StartupPath, );

 IFeatureClass f1 = (ws as IFeatureWorkspace).OpenFeatureClass("floodarea1");

打开mdb工作空间：

 IWorkspaceFactory wsf = new ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactory();

 IWorkspace ws = wsf.OpenFromFile(Application.StartupPath+@"\test.mdb", );

 IFeatureClass f1 = (ws as IFeatureWorkspace).OpenFeatureClass("floodarea1");

用IWorkspaceName打开mdb工作空间：

 IPropertySet pPropSet = new PropertySetClass();

                 pPropSet.SetProperty("DATABASE", strMdb);

                 IWorkspaceName pInWsName = new WorkspaceNameClass();

                 pInWsName.WorkspaceFactoryProgID = "esriDataSourcesGDB.AccessWorkspaceFactory";

                 pInWsName.ConnectionProperties = pPropSet;

                 IWorkspaceFactory pFact = new AccessWorkspaceFactoryClass();

                 IWorkspace pWorkspace = pFact.Open(pPropSet, );

打开存储在oracle中的sde工作空间：

 IWorkspace ws = null;

 IPropertySet pPropSet = new PropertySetClass();

 IWorkspaceFactory pSdeFact = new SdeWorkspaceFactoryClass();

 string Server = "192.168.1.91";

 string Instance = "";//"esri_sde";

 string Database = "oracle";

 string User = "sde";

 string Password = "sde";

 string version = "SDE.DEFAULT";

 pPropSet.SetProperty("SERVER", Server);

 pPropSet.SetProperty("INSTANCE", Instance);

 pPropSet.SetProperty("DATABASE", Database);

 pPropSet.SetProperty("USER", User);

 pPropSet.SetProperty("PASSWORD", Password);

 pPropSet.SetProperty("VERSION", version);

 ws = pSdeFact.Open(pPropSet, );

 IFeatureClass f1 = (ws as IFeatureWorkspace).OpenFeatureClass("floodarea1");