ObjectQuery Class

ObjectQuery Class

 

Implements common functionality for queries against a conceptual model using both LINQ to Entities and ObjectQuery<T>.

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

System.Object
  System.Data.Objects.ObjectQuery
    System.Data.Objects.ObjectQuery<T>

public abstract class ObjectQuery : IEnumerable, IQueryable, 
	IOrderedQueryable, IListSource

NameDescription
System_CAPS_pubpropertyCommandText

Returns the command text for the query.

System_CAPS_pubpropertyContext

Gets the object context associated with this object query.

System_CAPS_pubpropertyEnablePlanCaching

Gets or sets a value that indicates whether the query plan should be cached.

System_CAPS_pubpropertyMergeOption

Gets or sets how objects returned from a query are added to the object context.

System_CAPS_pubpropertyParameters

Gets the parameter collection for this object query.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_pubmethodExecute(MergeOption)

Executes the untyped object query with the specified merge option.

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetResultType()

Returns information about the result type of the query.

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubmethodToTraceString()

Returns the commands to execute against the data source.

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethodIEnumerable.GetEnumerator()

Returns an enumerator that iterates through a collection.

System_CAPS_pubinterfaceSystem_CAPS_privmethodIListSource.GetList()

Returns the collection as an IList used for data binding.

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIListSource.ContainsListCollection

Gets a value that indicates whether the collection returned by the query contains collection objects.

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIQueryable.ElementType

Gets the result element type for this query instance.

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIQueryable.Expression

Gets the expression describing this query.

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIQueryable.Provider

Gets the LINQ IQueryProvider associated with this query instance.

NameDescription
System_CAPS_pubmethodAsParallel()

Overloaded. Enables parallelization of a query.(Defined by ParallelEnumerable.)

System_CAPS_pubmethodAsQueryable()

Overloaded. Converts an IEnumerable to an IQueryable.(Defined by Queryable.)

System_CAPS_pubmethodCast<TResult>()

Casts the elements of an IEnumerable to the specified type.(Defined by Enumerable.)

System_CAPS_pubmethodOfType<TResult>()

Filters the elements of an IEnumerable based on a specified type.(Defined by Enumerable.)

ObjectQuery is the base class for queries against a conceptual model. ObjectQuery is provided to ensure that LINQ to Entities queries have the same functionality as queries executed using ObjectQuery<T>. You must use ObjectQuery<T> with a specified type to query a conceptual model. For more information, see Object Queries.

.NET Framework
Available since 3.5

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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