Queryable.UnionBy Method
Definition
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Overloads
| UnionBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TSource>, Expression<Func<TSource,TKey>>) |
Produces the set union of two sequences according to a specified key selector function. |
| UnionBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TSource>, Expression<Func<TSource,TKey>>, IEqualityComparer<TKey>) |
Produces the set union of two sequences according to a specified key selector function. |
UnionBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TSource>, Expression<Func<TSource,TKey>>)
- Source:
- Queryable.cs
- Source:
- Queryable.cs
- Source:
- Queryable.cs
Produces the set union 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> ^ UnionBy(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TSource> ^ source2, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector);public static System.Linq.IQueryable<TSource> UnionBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TSource> source2, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector);static member UnionBy : System.Linq.IQueryable<'Source> * seq<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> -> System.Linq.IQueryable<'Source><Extension()>
Public Function UnionBy(Of TSource, TKey) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TSource), 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 form the first set for the union.
- source2
- IEnumerable<TSource>
An IEnumerable<T> whose distinct elements form the second set for the union.
- keySelector
- Expression<Func<TSource,TKey>>
A function to extract the key for each element.
Returns
An IEnumerable<T> that contains the elements from both input sequences, excluding duplicates.
Exceptions
source1 or source2 is null.
Applies to
UnionBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TSource>, Expression<Func<TSource,TKey>>, IEqualityComparer<TKey>)
- Source:
- Queryable.cs
- Source:
- Queryable.cs
- Source:
- Queryable.cs
Produces the set union 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> ^ UnionBy(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TSource> ^ source2, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector, System::Collections::Generic::IEqualityComparer<TKey> ^ comparer);public static System.Linq.IQueryable<TSource> UnionBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TSource> source2, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector, System.Collections.Generic.IEqualityComparer<TKey>? comparer);static member UnionBy : System.Linq.IQueryable<'Source> * seq<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IEqualityComparer<'Key> -> System.Linq.IQueryable<'Source><Extension()>
Public Function UnionBy(Of TSource, TKey) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TSource), 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 form the first set for the union.
- source2
- IEnumerable<TSource>
An IEnumerable<T> whose distinct elements form the second set for the union.
- keySelector
- Expression<Func<TSource,TKey>>
A function to extract the key for each element.
- comparer
- IEqualityComparer<TKey>
The IEqualityComparer<T> to compare values.
Returns
An IEnumerable<T> that contains the elements from both input sequences, excluding duplicates.
Exceptions
source1 or source2 is null.
