Queryable.UnionBy 方法

定義

命名空間:: System.Linq

組件:: netstandard.dll, System.Linq.Queryable.dll

重要

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多載

名稱	Description
UnionBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TSource>, Expression<Func<TSource,TKey>>)	根據指定的索引鍵選取器函式，產生兩個序列的集合聯集。
UnionBy<TSource,TKey>(IQueryable<TSource>, IEnumerable<TSource>, Expression<Func<TSource,TKey>>, IEqualityComparer<TKey>)	根據指定的索引鍵選取器函式，產生兩個序列的集合聯集。

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

來源:: Queryable.cs

來源:: Queryable.cs

來源:: Queryable.cs

來源:: Queryable.cs

來源:: Queryable.cs

根據指定的索引鍵選取器函式，產生兩個序列的集合聯集。

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);

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")]
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>

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")>]
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)

類型參數

TSource

輸入序列元素的類型。

TKey

識別元素的鍵型。

參數

source1: IQueryable<TSource>

一個 IQueryable<T> 其不同元素組成聯集的第一集合。

source2: IEnumerable<TSource>

一個 IEnumerable<T> 其不同元素組成聯集的第二集合。

keySelector: Expression<Func<TSource,TKey>>

一個用來提取每個元素鍵值的函式。

傳回

IQueryable<TSource>

包含 IEnumerable<T> 兩個輸入序列元素（排除重複序列）的。

屬性: RequiresDynamicCodeAttribute

例外狀況

ArgumentNullException

source1 或 source2 為 null。

適用於

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

來源:: Queryable.cs

來源:: Queryable.cs

來源:: Queryable.cs

來源:: Queryable.cs

來源:: Queryable.cs

根據指定的索引鍵選取器函式，產生兩個序列的集合聯集。

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);

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")]
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>

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")>]
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)