Metodi di paging (LINQ to Entities)

Alcuni metodi di paging LINQ non sono supportati nelle query LINQ to Entities. Per ulteriori informazioni, vedere Operatori di query standard nelle query LINQ to Entities. Nella tabella seguente sono elencati i metodi di paging supportati e non supportati.

Metodi supportati e non supportati

Metodo Supporto Firma della funzione Visual Basic Firma del metodo C#

ElementAt

Non supportato

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

ElementAtOrDefault

Non supportato

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

First

Supportato

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

First

Supportato

 
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

Supportato

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

FirstOrDefault

Supportato

 
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

Non supportato

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

Last

Non supportato

 
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

Non supportato

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

LastOrDefault

Non supportato

 
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

Non supportato

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

Single

Non supportato

 
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

Non supportato

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

SingleOrDefault

Non supportato

 
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

Supportato

 
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

Non supportato

 
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

Non supportato

 
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

Supportato

 
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

Non supportato

 
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

Non supportato

 
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
)

Vedere anche

Concetti

Metodi supportati e non supportati (LINQ to Entities)

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