Queryable.IntersectBy Method

Definition

Namespace:

System.Linq

Assembly:

System.Linq.Queryable.dll

Overloads

IntersectBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TKey>, Expression<Func<TSource,TKey>>)	Produces the set intersection of two sequences according to a specified key selector function.
IntersectBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TKey>, Expression<Func<TSource,TKey>>, IEqualityComparer<TKey>)	Produces the set intersection of two sequences according to a specified key selector function.

IntersectBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TKey>, Expression<Func<TSource,TKey>>)

Source:

Queryable.cs

Produces the set intersection of two sequences according to a specified key selector function.

public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::IQueryable<TSource> ^ IntersectBy(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TKey> ^ source2, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector);

public static System.Linq.IQueryable<TSource> IntersectBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TKey> source2, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector);

static member IntersectBy : System.Linq.IQueryable<'Source> * seq<'Key> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> -> System.Linq.IQueryable<'Source>

<Extension()>
Public Function IntersectBy(Of TSource, TKey) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TKey), keySelector As Expression(Of Func(Of TSource, TKey))) As IQueryable(Of TSource)

Type Parameters

TSource

The type of the elements of the input sequences.

TKey

The type of key to identify elements by.

Parameters

source1

IQueryable<TSource>

An IQueryable<T> whose distinct elements that also appear in source2 will be returned.

source2

IEnumerable<TKey>

An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.

keySelector

Expression<Func<TSource,TKey>>

A function to extract the key for each element.

Returns

IQueryable<TSource>

A sequence that contains the elements that form the set intersection of two sequences.

Exceptions

ArgumentNullException

source1 or source2 is null.

IntersectBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TKey>, Expression<Func<TSource,TKey>>, IEqualityComparer<TKey>)

Source:

Queryable.cs

Produces the set intersection of two sequences according to a specified key selector function.

public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::IQueryable<TSource> ^ IntersectBy(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TKey> ^ source2, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector, System::Collections::Generic::IEqualityComparer<TKey> ^ comparer);

public static System.Linq.IQueryable<TSource> IntersectBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TKey> source2, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer);

static member IntersectBy : System.Linq.IQueryable<'Source> * seq<'Key> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Linq.IQueryable<'Source>

<Extension()>
Public Function IntersectBy(Of TSource, TKey) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TKey), keySelector As Expression(Of Func(Of TSource, TKey)), comparer As IEqualityComparer(Of TKey)) As IQueryable(Of TSource)

Type Parameters

TSource

The type of the elements of the input sequences.

TKey

The type of key to identify elements by.

Parameters

source1

IQueryable<TSource>

An IQueryable<T> whose distinct elements that also appear in source2 will be returned.

source2

IEnumerable<TKey>

An IEnumerable<T> whose distinct elements that also appear in the first sequence will be returned.

keySelector

Expression<Func<TSource,TKey>>

A function to extract the key for each element.

comparer

IEqualityComparer<TKey>

An IEqualityComparer<T> to compare keys.

Returns

IQueryable<TSource>

A sequence that contains the elements that form the set intersection of two sequences.

Exceptions

ArgumentNullException

source1 or source2 is null.