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DbSet Class

Entity Framework 5.0

Represents an entity set that is used to perform create, read, update, and delete operations. A non-generic version of DbSet<TEntity> which can be used when the type of entity is not known at build time.

Namespace:  System.Data.Entity
Assembly:  EntityFramework (in EntityFramework.dll)

public ref class DbSet abstract : public DbQuery

The DbSet type exposes the following members.

  NameDescription
Public propertyElementTypeThe IQueryable element type. (Inherited from DbQuery.)
Public propertyLocalReturns ObservableCollection<T> that represents entities of the set that are currently being tracked by the context and have not been marked as Deleted. Accessing the Local property never causes a query to be sent to the database. This property is usually used after a query has already been executed.
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  NameDescription
Public methodAddAdds the given entity to the context the Added state. When the changes are being saved, the entities in the Added states are inserted into the database. After the changes are saved, the object state changes to Unchanged.
Public methodAsNoTrackingReturns a new query where the entities returned will not be cached in the DbContext. (Inherited from DbQuery.)
Public methodAttachAttaches the given entity to the context in the Unchanged
Public methodCast<TEntity>Returns the equivalent generic DbSet<TEntity> object.
Public methodCreate()Creates a new instance of an entity for the type of this set. This instance is not added or attached to the set. The instance returned will be a proxy if the underlying context is configured to create proxies and the entity type meets the requirements for creating a proxy.
Public methodCreate(Type)Creates a new instance of an entity for the type of this set or for a type derived from the type of this set. This instance is not added or attached to the set. The instance returned will be a proxy if the underlying context is configured to create proxies and the entity type meets the requirements for creating a proxy.
Public methodEqualsReturns whether the specified set is equal to the current set. (Overrides DbQuery::Equals(Object).)
Protected methodFinalize (Inherited from Object.)
Public methodFindUses the primary key value to attempt to find an entity tracked by the context. If the entity is not in the context then a query will be executed and evaluated against the data in the data source, and null is returned if the entity is not found in the context or in the data source. Note that the Find also returns entities that have been added to the context but have not yet been saved to the database.
Public methodGetHashCodeReturns the hash function for the specified set. (Overrides DbQuery::GetHashCode().)
Public methodGetTypeGets the type for the current set.
Public methodIncludeReturns the included non generic LINQ to Entities query against a DbContext. (Inherited from DbQuery.)
Protected methodMemberwiseClone (Inherited from Object.)
Public methodRemoveMarks the given entity as Deleted. When the changes are saved, the entity is deleted from the database. The entity must exist in the context in some other state before this method is called.
Public methodSqlQueryCreates a raw SQL query that will return entities in this set. By default, the entities returned are tracked by the context; this can be changed by calling AsNoTracking on the DbSqlQuery<TEntity> returned from this method.
Public methodToStringReturns a String representation of the underlying query. (Inherited from DbQuery.)
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  NameDescription
Explicit interface implemetationPrivate propertyIListSource::ContainsListCollectionReturns false. (Inherited from DbQuery.)
Explicit interface implemetationPrivate propertyIQueryable::ExpressionThe IQueryable LINQ Expression. (Inherited from DbQuery.)
Explicit interface implemetationPrivate methodIEnumerable::GetEnumeratorGets the enumeration of this query causing it to be executed against the store. (Inherited from DbQuery.)
Explicit interface implemetationPrivate methodIListSource::GetListThrows an exception indicating that binding directly to a store query is not supported. (Inherited from DbQuery.)
Explicit interface implemetationPrivate propertyIQueryable::ProviderThe IQueryable provider. (Inherited from DbQuery.)
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Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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