Métodos admitidos y no admitidos de LINQ (LINQ to Entities)

  • Artículo

En esta sección se proporciona información sobre los operadores de consulta estándar de Language-Integrated Query (LINQ) que se admiten o no en las consultas de LINQ to Entities . Muchos de los operadores de consulta estándar de LINQ tienen una versión sobrecargada que acepta un argumento entero. El argumento entero corresponde a un índice que comienza en cero en la secuencia en la que se opera, un IEqualityComparer o IComparer. A menos que se especifique lo contrario, estas versiones sobrecargadas de los operadores de consulta estándar de LINQ no se admiten y, si intenta utilizarlos, se iniciará una excepción.

Métodos de restricción y proyección

La mayoría de los métodos de restricción y proyección de LINQ se admiten en las consultas de LINQ to Entities , con la excepción de las que aceptan un argumento de posición. Para obtener más información, vea Operadores de consulta estándar en las consultas de LINQ to Entities. En la tabla siguiente se enumeran los métodos de restricción y proyección admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

Select

Admitido

 
Function Select(Of TSource, TResult) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> Select<TSource, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, TResult>> selector
)

Select

No se admite

 
Function Select(Of TSource, TResult) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Integer, TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> Select<TSource, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, int, TResult>> selector
)

SelectMany

Admitido

 
Function SelectMany(Of TSource, TResult) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, IEnumerable(Of TResult))) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> SelectMany<TSource, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, IEnumerable<TResult>>> selector
)

SelectMany

No se admite

 
Function SelectMany(Of TSource, TResult) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Integer, IEnumerable(Of TResult))) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> SelectMany<TSource, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, int, IEnumerable<TResult>>> selector
)

SelectMany

Admitido

 
Function SelectMany(Of TSource, TCollection, TResult) ( _
source As IQueryable(Of TSource), _
collectionSelector As Expression(Of Func(Of TSource, IEnumerable(Of TCollection))), _
resultSelector As Expression(Of Func(Of TSource, TCollection, TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> SelectMany<TSource, TCollection, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, IEnumerable<TCollection>>> collectionSelector,
Expression<Func<TSource, TCollection, TResult>> resultSelector
)

SelectMany

No se admite

 
Function SelectMany(Of TSource, TCollection, TResult) ( _
source As IQueryable(Of TSource), _
collectionSelector As Expression(Of Func(Of TSource, Integer, IEnumerable(Of TCollection))), _
resultSelector As Expression(Of Func(Of TSource, TCollection, TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> SelectMany<TSource, TCollection, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, int, IEnumerable<TCollection>>> collectionSelector,
Expression<Func<TSource, TCollection, TResult>> resultSelector
)

Where

Admitido

 
Function Where(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Where<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

Where

No se admite

 
Function Where(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Integer, Boolean)) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Where<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, int, bool>> predicate
)

Métodos de combinación

Los métodos de combinación de LINQ se admiten en LINQ to Entities , con excepción de los que aceptan un IEqualityComparer, porque el comparador no se puede convertir en el origen de datos. Para obtener más información, vea Operadores de consulta estándar en las consultas de LINQ to Entities. En la tabla siguiente se enumeran los métodos de combinación admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

GroupJoin

Admitido

 
Function GroupJoin(Of TOuter, TInner, TKey, TResult) ( _
outer As IQueryable(Of TOuter), _
inner As IEnumerable(Of TInner), _
outerKeySelector As Expression(Of Func(Of TOuter, TKey)), _
innerKeySelector As Expression(Of Func(Of TInner, TKey)), _
resultSelector As Expression(Of Func(Of TOuter, IEnumerable(Of TInner), TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(
this IQueryable<TOuter> outer,
IEnumerable<TInner> inner,
Expression<Func<TOuter, TKey>> outerKeySelector,
Expression<Func<TInner, TKey>> innerKeySelector,
Expression<Func<TOuter, IEnumerable<TInner>, TResult>> resultSelector
)

GroupJoin

No admitido

 
Function GroupJoin(Of TOuter, TInner, TKey, TResult) ( _
outer As IQueryable(Of TOuter), _
inner As IEnumerable(Of TInner), _
outerKeySelector As Expression(Of Func(Of TOuter, TKey)), _
innerKeySelector As Expression(Of Func(Of TInner, TKey)), _
resultSelector As Expression(Of Func(Of TOuter, IEnumerable(Of TInner), TResult)), _
comparer As IEqualityComparer(Of TKey) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(
this IQueryable<TOuter> outer,
IEnumerable<TInner> inner,
Expression<Func<TOuter, TKey>> outerKeySelector,
Expression<Func<TInner, TKey>> innerKeySelector,
Expression<Func<TOuter, IEnumerable<TInner>, TResult>> resultSelector,
IEqualityComparer<TKey> comparer
)

Join

Admitido

 
Function Join(Of TOuter, TInner, TKey, TResult) ( _
outer As IQueryable(Of TOuter), _
inner As IEnumerable(Of TInner), _
outerKeySelector As Expression(Of Func(Of TOuter, TKey)), _
innerKeySelector As Expression(Of Func(Of TInner, TKey)), _
resultSelector As Expression(Of Func(Of TOuter, TInner, TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> Join<TOuter, TInner, TKey, TResult>(
this IQueryable<TOuter> outer,
IEnumerable<TInner> inner,
Expression<Func<TOuter, TKey>> outerKeySelector,
Expression<Func<TInner, TKey>> innerKeySelector,
Expression<Func<TOuter, TInner, TResult>> resultSelector
)

Join

No admitido

 
 Function Join(Of TOuter, TInner, TKey, TResult) ( _
outer As IQueryable(Of TOuter), _
inner As IEnumerable(Of TInner), _
outerKeySelector As Expression(Of Func(Of TOuter, TKey)), _
innerKeySelector As Expression(Of Func(Of TInner, TKey)), _
resultSelector As Expression(Of Func(Of TOuter, TInner, TResult)), _
comparer As IEqualityComparer(Of TKey) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> Join<TOuter, TInner, TKey, TResult>(
this IQueryable<TOuter> outer,
IEnumerable<TInner> inner,
Expression<Func<TOuter, TKey>> outerKeySelector,
Expression<Func<TInner, TKey>> innerKeySelector,
Expression<Func<TOuter, TInner, TResult>> resultSelector,
IEqualityComparer<TKey> comparer
)

Métodos Set

La mayoría de los métodos Set de LINQ se admiten en consultas de LINQ to Entities , a excepción de las que usan EqualityComparer. Para obtener más información, vea Operadores de consulta estándar en las consultas de LINQ to Entities. En la tabla siguiente se enumeran los métodos Set admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

All

Admitido

 
Function All(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As Boolean
 
bool All<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

Any

Admitido

 
Function Any(Of TSource) ( _
source As IQueryable(Of TSource) _
) As Boolean
 
bool Any<TSource>(
this IQueryable<TSource> source
)

Any

Admitido

 
Function Any(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As Boolean
 
bool Any<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

Contains

Admitido

 
Function Contains(Of TSource) ( _
source As IQueryable(Of TSource), _
item As TSource _
) As Boolean
 
bool Contains<TSource>(
this IQueryable<TSource> source,
TSource item
)

Contains

No se admite

 
Function Contains(Of TSource) ( _
source As IQueryable(Of TSource), _
item As TSource, _
comparer As IEqualityComparer(Of TSource) _
) As Boolean
 
bool Contains<TSource>(
this IQueryable<TSource> source,
TSource item,
IEqualityComparer<TSource> comparer
)

Concat

Admitido, pero no hay ninguna

garantía de que se conserve el orden

 
Function Concat(Of TSource) ( _
source1 As IQueryable(Of TSource), _
source2 As IEnumerable(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Concat<TSource>(
this IQueryable<TSource> source1,
IEnumerable<TSource> source2
)

DefaultIfEmpty

Admitido

 
Function DefaultIfEmpty(Of TSource) ( _
source As IQueryable(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> DefaultIfEmpty<TSource>(
this IQueryable<TSource> source
)

DefaultIfEmpty

Admitido

 
Function DefaultIfEmpty(Of TSource) ( _
source As IQueryable(Of TSource), _
defaultValue As TSource _
) As IQueryable(Of TSource)
 
IQueryable<TSource> DefaultIfEmpty<TSource>(
this IQueryable<TSource> source,
TSource defaultValue
)

Distinct

Admitido

 
Function Distinct(Of TSource) ( _
source As IQueryable(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Distinct<TSource>(
this IQueryable<TSource> source
)

Distinct

No se admite

 
Function Distinct(Of TSource) ( _
source As IQueryable(Of TSource), _
comparer As IEqualityComparer(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Distinct<TSource>(
this IQueryable<TSource> source,
IEqualityComparer<TSource> comparer
)

Except

Admitido

 
Function Except(Of TSource) ( _
source1 As IQueryable(Of TSource), _
source2 As IEnumerable(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Except<TSource>(
this IQueryable<TSource> source1,
IEnumerable<TSource> source2
)

Except

No se admite

 
Function Except(Of TSource) ( _
source1 As IQueryable(Of TSource), _
source2 As IEnumerable(Of TSource), _
comparer As IEqualityComparer(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Except<TSource>(
this IQueryable<TSource> source1,
IEnumerable<TSource> source2,
IEqualityComparer<TSource> comparer
)

Intersect

Admitido

 
Function Intersect(Of TSource) ( _
source1 As IQueryable(Of TSource), _
source2 As IEnumerable(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Intersect<TSource>(
this IQueryable<TSource> source1,
IEnumerable<TSource> source2
)

Intersect

No se admite

 
Function Intersect(Of TSource) ( _
source1 As IQueryable(Of TSource), _
source2 As IEnumerable(Of TSource), _
comparer As IEqualityComparer(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Intersect<TSource>(
this IQueryable<TSource> source1,
IEnumerable<TSource> source2,
IEqualityComparer<TSource> comparer
)

Union

Admitido

 
Function Union(Of TSource) ( _
source1 As IQueryable(Of TSource), _
source2 As IEnumerable(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Union<TSource>(
this IQueryable<TSource> source1,
IEnumerable<TSource> source2
)

Union

No se admite

 
Function Union(Of TSource) ( _
source1 As IQueryable(Of TSource), _
source2 As IEnumerable(Of TSource), _
comparer As IEqualityComparer(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Union<TSource>(
this IQueryable<TSource> source1,
IEnumerable<TSource> source2,
IEqualityComparer<TSource> comparer
)

Métodos de ordenación

La mayoría de los métodos de ordenación de LINQ se admiten en LINQ to Entities , con excepción de los que aceptan un IComparer, porque el comparador no se puede convertir en el origen de datos. Para obtener más información, vea Operadores de consulta estándar en las consultas de LINQ to Entities. En la tabla siguiente se enumeran los métodos de ordenación admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

OrderBy

Admitido

 
Function OrderBy(Of TSource, TKey) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> OrderBy<TSource, TKey>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector
)

OrderBy

No se admite

 
Function OrderBy(Of TSource, TKey) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
comparer As IComparer(Of TKey) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> OrderBy<TSource, TKey>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
IComparer<TKey> comparer
)

OrderByDescending

Admitido

 
Function OrderByDescending(Of TSource, TKey) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> OrderByDescending<TSource, TKey>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector
)

OrderByDescending

No se admite

 
Function OrderByDescending(Of TSource, TKey) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
comparer As IComparer(Of TKey) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> OrderByDescending<TSource, TKey>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
IComparer<TKey> comparer
)

ThenBy

Admitido

 
Function ThenBy(Of TSource, TKey) ( _
source As IOrderedQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> ThenBy<TSource, TKey>(
this IOrderedQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector
)

ThenBy

No se admite

 
Function ThenBy(Of TSource, TKey) ( _
source As IOrderedQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
comparer As IComparer(Of TKey) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> ThenBy<TSource, TKey>(
this IOrderedQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
IComparer<TKey> comparer
)

ThenByDescending

Admitido

 
Function ThenByDescending(Of TSource, TKey) ( _
source As IOrderedQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> ThenByDescending<TSource, TKey>(
this IOrderedQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector
)

ThenByDescending

No se admite

 
Function ThenByDescending(Of TSource, TKey) ( _
source As IOrderedQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
comparer As IComparer(Of TKey) _
) As IOrderedQueryable(Of TSource)
 
IOrderedQueryable<TSource> ThenByDescending<TSource, TKey>(
this IOrderedQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
IComparer<TKey> comparer
)

Reverse

No se admite

 
Function Reverse(Of TSource) ( _
source As IQueryable(Of TSource) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Reverse<TSource>(
this IQueryable<TSource> source
)

Métodos de agrupamiento

La mayoría de los métodos de agrupamiento de LINQ se admiten en LINQ to Entities , con excepción de los que aceptan un IEqualityComparer, porque el comparador no se puede convertir en el origen de datos. Para obtener más información, vea Operadores de consulta estándar en las consultas de LINQ to Entities. En la tabla siguiente se enumeran los métodos de agrupamiento admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

GroupBy

Admitido

 
Function GroupBy(Of TSource, TKey) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)) _
) As IQueryable(Of IGrouping(Of TKey, TSource))
 
IQueryable<IGrouping<TKey, TSource>> GroupBy<TSource, TKey>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector
)

GroupBy

No se admite

 
Function GroupBy(Of TSource, TKey) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
comparer As IEqualityComparer(Of TKey) _
) As IQueryable(Of IGrouping(Of TKey, TSource))
 
IQueryable<IGrouping<TKey, TSource>> GroupBy<TSource, TKey>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
IEqualityComparer<TKey> comparer
)

GroupBy

Admitido

 
Function GroupBy(Of TSource, TKey, TElement) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
elementSelector As Expression(Of Func(Of TSource, TElement)) _
) As IQueryable(Of IGrouping(Of TKey, TElement))
 
IQueryable<IGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
Expression<Func<TSource, TElement>> elementSelector
)

GroupBy

Admitido

 
Function GroupBy(Of TSource, TKey, TResult) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
resultSelector As Expression(Of Func(Of TKey, IEnumerable(Of TSource), TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> GroupBy<TSource, TKey, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
Expression<Func<TKey, IEnumerable<TSource>, TResult>> resultSelector
)

GroupBy

No se admite

 
Function GroupBy(Of TSource, TKey, TElement) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
elementSelector As Expression(Of Func(Of TSource, TElement)), _
comparer As IEqualityComparer(Of TKey) _
) As IQueryable(Of IGrouping(Of TKey, TElement))
 
IQueryable<IGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
Expression<Func<TSource, TElement>> elementSelector,
IEqualityComparer<TKey> comparer

GroupBy

Admitido

 
Function GroupBy(Of TSource, TKey, TElement, TResult) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
elementSelector As Expression(Of Func(Of TSource, TElement)), _
resultSelector As Expression(Of Func(Of TKey, IEnumerable(Of TElement), TResult)) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> GroupBy<TSource, TKey, TElement, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
Expression<Func<TSource, TElement>> elementSelector,
Expression<Func<TKey, IEnumerable<TElement>, TResult>> resultSelector
)

GroupBy

No se admite

 
Function GroupBy(Of TSource, TKey, TResult) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
resultSelector As Expression(Of Func(Of TKey, IEnumerable(Of TSource), TResult)), _
comparer As IEqualityComparer(Of TKey) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> GroupBy<TSource, TKey, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
Expression<Func<TKey, IEnumerable<TSource>, TResult>> resultSelector,
IEqualityComparer<TKey> comparer
)

GroupBy

No se admite

 
Function GroupBy(Of TSource, TKey, TElement, TResult) ( _
source As IQueryable(Of TSource), _
keySelector As Expression(Of Func(Of TSource, TKey)), _
elementSelector As Expression(Of Func(Of TSource, TElement)), _
resultSelector As Expression(Of Func(Of TKey, IEnumerable(Of TElement), TResult)), _
comparer As IEqualityComparer(Of TKey) _
) As IQueryable(Of TResult)
 
IQueryable<TResult> GroupBy<TSource, TKey, TElement, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, TKey>> keySelector,
Expression<Func<TSource, TElement>> elementSelector,
Expression<Func<TKey, IEnumerable<TElement>, TResult>> resultSelector,
IEqualityComparer<TKey> comparer
)

Métodos de agregación

LINQ to Entities admite la mayoría de los métodos de agregación que aceptan tipos de datos primitivos. Para obtener más información, vea Operadores de consulta estándar en las consultas de LINQ to Entities. En la tabla siguiente se enumeran los métodos de agregación admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

Aggregate

No se admite

 
Function Aggregate(Of TSource) ( _
source As IQueryable(Of TSource), _
func As Expression(Of Func(Of TSource, TSource, TSource)) _
) As TSource
 
TSource Aggregate<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, TSource, TSource>> func
)

Aggregate

No se admite

 
Function Aggregate(Of TSource, TAccumulate) ( _
source As IQueryable(Of TSource), _
seed As TAccumulate, _
func As Expression(Of Func(Of TAccumulate, TSource, TAccumulate)) _
) As TAccumulate
 
TAccumulate Aggregate<TSource, TAccumulate>(
this IQueryable<TSource> source,
TAccumulate seed,
Expression<Func<TAccumulate, TSource, TAccumulate>> func
)

Aggregate

No se admite

 
Function Aggregate(Of TSource, TAccumulate, TResult) ( _
source As IQueryable(Of TSource), _
seed As TAccumulate, _
func As Expression(Of Func(Of TAccumulate, TSource, TAccumulate)), _
selector As Expression(Of Func(Of TAccumulate, TResult)) _
) As TResult
 
TResult Aggregate<TSource, TAccumulate, TResult>(
this IQueryable<TSource> source,
TAccumulate seed,
Expression<Func<TAccumulate, TSource, TAccumulate>> func,
Expression<Func<TAccumulate, TResult>> selector
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Decimal) _
) As Decimal
 
decimal Average(
this IQueryable<decimal> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Double) _
) As Double
 
double Average(
this IQueryable<double> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Integer) _
) As Double
 
double Average(
this IQueryable<int> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Long) _
) As Double
 
double Average(
this IQueryable<long> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Nullable(Of Decimal)) _
) As Nullable(Of Decimal)
 
Nullable<decimal> Average(
this IQueryable<Nullable<decimal>> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Nullable(Of Double)) _
) As Nullable(Of Double)
 
Nullable<double> Average(
this IQueryable<Nullable<double>> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Nullable(Of Integer)) _
) As Nullable(Of Double)
 
Nullable<double> Average(
this IQueryable<Nullable<int>> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Nullable(Of Long)) _
) As Nullable(Of Double)
 
Nullable<double> Average(
this IQueryable<Nullable<long>> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Nullable(Of Single)) _
) As Nullable(Of Single)
 
Nullable<float> Average(
this IQueryable<Nullable<float>> source
)

Average

Admitido

 
Function Average ( _
source As IQueryable(Of Single) _
) As Single
 
float Average(
this IQueryable<float> source
)

Average

No admitido

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Integer)) _
) As Double
 
double Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, int>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Integer))) _
) As Nullable(Of Double)
 
Nullable<double> Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<int>>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Long)) _
) As Double
 
double Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, long>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Long))) _
) As Nullable(Of Double)
 
Nullable<double> Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<long>>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Single)) _
) As Single
 
float Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, float>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Single))) _
) As Nullable(Of Single)
 
Nullable<float> Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<float>>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Double)) _
) As Double
 
double Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, double>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Double))) _
) As Nullable(Of Double)
 
Nullable<double> Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<double>>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Decimal)) _
) As Decimal
 
decimal Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, decimal>> selector
)

Average

No se admite

 
Function Average(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Decimal))) _
) As Nullable(Of Decimal)
 
Nullable<decimal> Average<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<decimal>>> selector
)

Count

Admitido

 
Function Count(Of TSource) ( _
source As IQueryable(Of TSource) _
) As Integer
 
int Count<TSource>(
this IQueryable<TSource> source
)

Count

No admitido

 
Function Count(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As Integer
 
int Count<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

LongCount

Admitido

 
Function LongCount(Of TSource) ( _
source As IQueryable(Of TSource) _
) As Long
 
long LongCount<TSource>(
this IQueryable<TSource> source
)

LongCount

No se admite

 
Function LongCount(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As Long
 
long LongCount<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

Max

Admitido

 
Function Max(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource Max<TSource>(
this IQueryable<TSource> source
)

Max

No admitido

 
Function Max(Of TSource, TResult) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, TResult)) _
) As TResult
 
TResult Max<TSource, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, TResult>> selector
)

Min

Admitido

 
Function Min(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource Min<TSource>(
this IQueryable<TSource> source
)

Min

No admitido

 
Function Min(Of TSource, TResult) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, TResult)) _
) As TResult
 
TResult Min<TSource, TResult>(
this IQueryable<TSource> source,
Expression<Func<TSource, TResult>> selector
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Decimal) _
) As Decimal
 
decimal Sum(
this IQueryable<decimal> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Double) _
) As Double
 
double Sum(
this IQueryable<double> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Integer) _
) As Integer
 
int Sum(
this IQueryable<int> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Long) _
) As Long
 
long Sum(
this IQueryable<long> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Nullable(Of Decimal)) _
) As Nullable(Of Decimal)
 
Nullable<decimal> Sum(
this IQueryable<Nullable<decimal>> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Nullable(Of Double)) _
) As Nullable(Of Double)
 
Function Sum ( _
source As IQueryable(Of Nullable(Of Double)) _
) As Nullable(Of Double)Nullable<double> Sum(
this IQueryable<Nullable<double>> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Nullable(Of Integer)) _
) As Nullable(Of Integer)
 
Nullable<int> Sum(
this IQueryable<Nullable<int>> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Nullable(Of Long)) _
) As Nullable(Of Long)
 
Nullable<long> Sum(
this IQueryable<Nullable<long>> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Nullable(Of Single)) _
) As Nullable(Of Single)
 
Nullable<float> Sum(
this IQueryable<Nullable<float>> source
)

Sum

Admitido

 
Function Sum ( _
source As IQueryable(Of Single) _
) As Single
 
float Sum(
this IQueryable<float> source
)

Sum

No admitido

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Integer)) _
) As Integer
 
int Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, int>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Integer))) _
) As Nullable(Of Integer)
 
Nullable<int> Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<int>>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Long)) _
) As Long
 
long Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, long>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Long))) _
) As Nullable(Of Long)
 
Nullable<long> Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<long>>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Single))) _
) As Nullable(Of Single)
 
Nullable<float> Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<float>>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Single)) _
) As Single
 
float Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, float>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Double)) _
) As Double
 
double Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, double>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Double))) _
) As Nullable(Of Double)
 
Nullable<double> Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<double>>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Decimal)) _
) As Decimal
 
decimal Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, decimal>> selector
)

Sum

No se admite

 
Function Sum(Of TSource) ( _
source As IQueryable(Of TSource), _
selector As Expression(Of Func(Of TSource, Nullable(Of Decimal))) _
) As Nullable(Of Decimal)
 
Nullable<decimal> Sum<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, Nullable<decimal>>> selector
)

Métodos de tipos

Entity Framework admite los operadores de consulta estándar LINQ que se ocupan de la conversión y prueba de tipos de CLR. LINQ to Entities admite solo los tipos de CLR que se asignan a los tipos del modelo conceptual. Para obtener una lista de los tipos del modelo conceptual, vea Tipos de modelos conceptuales. En la tabla siguiente se enumeran los métodos de tipos admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

Cast

Se admite para los tipos primitivos de EDM

 
Function Cast(Of TResult) ( _
source As IQueryable _
) As IQueryable(Of TResult)
 
IQueryable<TResult> Cast<TResult>(
this IQueryable source
)

OfType

Se admite para EntityType

 
Function OfType(Of TResult) ( _
source As IQueryable _
) As IQueryable(Of TResult)
 
IQueryable<TResult> OfType<TResult>(
this IQueryable source
)

Métodos de paginación

Algunos métodos de paginación de LINQ no se admiten en las consultas de LINQ to Entities . Para obtener más información, vea Operadores de consulta estándar en las consultas de LINQ to Entities. En la tabla siguiente se enumeran los métodos de paginación admitidos y no admitidos.

Método Compatibilidad Firma de funciones de Visual Basic Firma de métodos de C#

ElementAt

No se admite

 
Function ElementAt(Of TSource) ( _
source As IQueryable(Of TSource), _
index As Integer _
) As TSource
 
TSource ElementAt<TSource>(
this IQueryable<TSource> source,
int index
)

ElementAtOrDefault

No se admite

 
Function ElementAtOrDefault(Of TSource) ( _
source As IQueryable(Of TSource), _
index As Integer _
) As TSource
 
TSource ElementAtOrDefault<TSource>(
this IQueryable<TSource> source,
int index
)

First

Admitido

 
Function First(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource First<TSource>(
this IQueryable<TSource> source
)

First

Admitido

 
Function First(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As TSource
 
TSource First<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

FirstOrDefault

Admitido

 
Function FirstOrDefault(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource FirstOrDefault<TSource>(
this IQueryable<TSource> source
)

FirstOrDefault

Admitido

 
Function FirstOrDefault(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As TSource
 
TSource FirstOrDefault<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

Last

No se admite

 
Function Last(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource Last<TSource>(
this IQueryable<TSource> source
)

Last

No admitido

 
Function Last(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As TSource
 
TSource Last<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

LastOrDefault

No se admite

 
Function LastOrDefault(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource LastOrDefault<TSource>(
this IQueryable<TSource> source
)

LastOrDefault

No se admite

 
Function LastOrDefault(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As TSource
 
TSource LastOrDefault<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

Single

Admitido

 
Function Single(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource Single<TSource>(
this IQueryable<TSource> source
)

Single

Admitido

 
Function Single(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As TSource
 
TSource Single<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

SingleOrDefault

Admitido

 
Function SingleOrDefault(Of TSource) ( _
source As IQueryable(Of TSource) _
) As TSource
 
TSource SingleOrDefault<TSource>(
this IQueryable<TSource> source
)

SingleOrDefault

Admitido

 
Function SingleOrDefault(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As TSource
 
TSource SingleOrDefault<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

Skip

Admitido

 
Function Skip(Of TSource) ( _
source As IQueryable(Of TSource), _
count As Integer _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Skip<TSource>(
this IQueryable<TSource> source,
int count
)

SkipWhile

No se admite

 
Function SkipWhile(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> SkipWhile<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

SkipWhile

No se admite

 
Function SkipWhile(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Integer, Boolean)) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> SkipWhile<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, int, bool>> predicate
)

Take

Admitido

 
Function Take(Of TSource) ( _
source As IQueryable(Of TSource), _
count As Integer _
) As IQueryable(Of TSource)
 
IQueryable<TSource> Take<TSource>(
this IQueryable<TSource> source,
int count
)

TakeWhile

No se admite

 
Function TakeWhile(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Boolean)) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> TakeWhile<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, bool>> predicate
)

TakeWhile

No se admite

 
Function TakeWhile(Of TSource) ( _
source As IQueryable(Of TSource), _
predicate As Expression(Of Func(Of TSource, Integer, Boolean)) _
) As IQueryable(Of TSource)
 
IQueryable<TSource> TakeWhile<TSource>(
this IQueryable<TSource> source,
Expression<Func<TSource, int, bool>> predicate
)

Vea también

Conceptos

Operadores de consulta estándar en las consultas de LINQ to Entities