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System.Data.Objects Namespace

The System.Data.Objects namespace includes classes that provide access to the core functionality of Object Services. These classes enable you to query, insert, update, and delete data by working with strongly typed CLR objects that are instances of entity types. Object Services supports both Language-Integrated Query (LINQ) and Entity SQL queries against types that are defined in an Entity Data Model (EDM). Object Services materializes the returned data as objects and propagates object changes back to the data source. It also provides facilities for tracking changes, binding objects to controls, and handling concurrency. For more information, see Object Services Overview (Entity Framework).

  ClassDescription
Public classCompiledQueryRepresents a cached LINQ to Entities query.
Public classCurrentValueRecordProvides access to the current values of object data.
Public classDbUpdatableDataRecordProvides access to the original values of object data. The DbUpdatableDataRecord implements methods that allow updates to the original values of an object.
Public classEntityFunctionsProvides common language runtime (CLR) methods that expose conceptual model canonical functions in LINQ to Entities queries. For information about canonical functions, see Canonical Functions (Entity SQL).
Public classObjectContextProvides facilities for querying and working with entity data as objects.
Public classObjectContextOptionsDefines options that affect the behavior of the ObjectContext.
Public classObjectMaterializedEventArgsContains the data for the ObjectMaterialized event.
Public classObjectParameterRepresents a query parameter that is passed to an object query.
Public classObjectParameterCollectionRepresents the query parameters as ObjectParameter objects that are defined in an ObjectQuery<T>.
Public classObjectQueryImplements common functionality for queries against a conceptual model using both LINQ to Entities and ObjectQuery<T>.
Public classObjectQuery<T>Represents a typed query against a conceptual model in a given object context.
Public classObjectResultThe base class for the results of an object query against a conceptual model.
Public classObjectResult<T>Represents the result of an ObjectQuery<T> as an enumerable collection of objects.
Public classObjectSet<TEntity>Represents a typed entity set that is used to perform create, read, update, and delete operations.
Public classObjectStateEntryMaintains state and key information for objects and relationships and change tracking for object properties.
Public classObjectStateManagerMaintains object state and identity management for entity type instances and relationship instances.
Public classOriginalValueRecordProvides access to the original values of object data.
Public classProxyDataContractResolverThis class helps resolve proxy types that were created for persistence-ignorant data classes to the actual types of persistence-ignorant objects.
  InterfaceDescription
Public interfaceIObjectSet<TEntity>Provides functionality to allow making modifications to a set of data objects.
  DelegateDescription
Public delegateObjectMaterializedEventHandlerRepresents the method that will handle the ObjectMaterialized event of the ObjectContext.
  EnumerationDescription
Public enumerationMergeOptionSpecifies how objects being loaded into the object context are merged with objects already in the object context.
Public enumerationRefreshModeSpecifies whether property changes made to objects tracked by Object Services are kept or replaced with property values from the data source.
Public enumerationSaveOptionsSpecifies the behavior of the object context when the SaveChanges(SaveOptions) method is called.

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