Queryable.Intersect Queryable.Intersect Queryable.Intersect Queryable.Intersect Method

定義

產生兩個序列的交集。Produces the set intersection of two sequences.

多載

Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>)

使用預設相等比較子來比較值,以便產生兩個序列的交集。Produces the set intersection of two sequences by using the default equality comparer to compare values.

Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

使用指定的 IEqualityComparer<T> 來比較值,以便產生兩個序列的交集。Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values.

Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>)

使用預設相等比較子來比較值,以便產生兩個序列的交集。Produces the set intersection of two sequences by using the default equality comparer to compare values.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::IQueryable<TSource> ^ Intersect(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TSource> ^ source2);
public static System.Linq.IQueryable<TSource> Intersect<TSource> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TSource> source2);
static member Intersect : System.Linq.IQueryable<'Source> * seq<'Source> -> System.Linq.IQueryable<'Source>
<Extension()>
Public Function Intersect(Of TSource) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TSource)) As IQueryable(Of TSource)

類型參數

TSource

輸入序列之項目的類型。The type of the elements of the input sequences.

參數

source1
IQueryable<TSource>

傳回其獨特項目同時出現在 source2 中的序列。A sequence whose distinct elements that also appear in source2 are returned.

source2
IEnumerable<TSource>

傳回其獨特項目同時出現在第一個序列中的序列。A sequence whose distinct elements that also appear in the first sequence are returned.

傳回

IQueryable<TSource>

包含兩個序列之交集的序列。A sequence that contains the set intersection of the two sequences.

例外狀況

source1source2nullsource1 or source2 is null.

範例

下列程式碼範例示範如何使用Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>)來傳回出現在兩個序列中的元素。The following code example demonstrates how to use Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) to return the elements that appear in each of two sequences.

int[] id1 = { 44, 26, 92, 30, 71, 38 };
int[] id2 = { 39, 59, 83, 47, 26, 4, 30 };

// Get the numbers that occur in both arrays (id1 and id2).
IEnumerable<int> both = id1.AsQueryable().Intersect(id2);

foreach (int id in both)
    Console.WriteLine(id);

/*
    This code produces the following output:

    26
    30
*/

Dim id1() As Integer = {44, 26, 92, 30, 71, 38}
Dim id2() As Integer = {39, 59, 83, 47, 26, 4, 30}

' Get the numbers that occur in both arrays (id1 and id2).
Dim both As IEnumerable(Of Integer) = id1.AsQueryable().Intersect(id2)

Dim output As New System.Text.StringBuilder
For Each id As Integer In both
    output.AppendLine(id)
Next

' Display the output.
MsgBox(output.ToString())

' This code produces the following output:

' 26
' 30

備註

方法會產生, 其代表以Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>)結構化泛型方法的方式呼叫本身。 MethodCallExpression Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>)The Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) method generates a MethodCallExpression that represents calling Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) itself as a constructed generic method. 然後, 它會MethodCallExpression將傳遞CreateQuery<TElement>(Expression)至由Provider source1參數IQueryProvider的屬性所表示之的方法。It then passes the MethodCallExpression to the CreateQuery<TElement>(Expression) method of the IQueryProvider represented by the Provider property of the source1 parameter.

因執行代表呼叫Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>)之運算式樹狀架構而產生的查詢行為, 取決於source1參數類型的實作為。The query behavior that occurs as a result of executing an expression tree that represents calling Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>) depends on the implementation of the type of the source1 parameter. 預期的行為是, 中source1的所有專案source2也會傳回。The expected behavior is that all the elements in source1 that are also in source2 are returned.

Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

使用指定的 IEqualityComparer<T> 來比較值,以便產生兩個序列的交集。Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::IQueryable<TSource> ^ Intersect(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TSource> ^ source2, System::Collections::Generic::IEqualityComparer<TSource> ^ comparer);
public static System.Linq.IQueryable<TSource> Intersect<TSource> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TSource> source2, System.Collections.Generic.IEqualityComparer<TSource> comparer);
static member Intersect : System.Linq.IQueryable<'Source> * seq<'Source> * System.Collections.Generic.IEqualityComparer<'Source> -> System.Linq.IQueryable<'Source>
<Extension()>
Public Function Intersect(Of TSource) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TSource), comparer As IEqualityComparer(Of TSource)) As IQueryable(Of TSource)

類型參數

TSource

輸入序列之項目的類型。The type of the elements of the input sequences.

參數

source1
IQueryable<TSource>

傳回其獨特項目同時出現在 source2 中的 IQueryable<T>An IQueryable<T> whose distinct elements that also appear in source2 are returned.

source2
IEnumerable<TSource>

傳回其獨特項目同時出現在第一個序列中的 IEnumerable<T>An IEnumerable<T> whose distinct elements that also appear in the first sequence are returned.

comparer
IEqualityComparer<TSource>

用來比較值的 IEqualityComparer<T>An IEqualityComparer<T> to compare values.

傳回

IQueryable<TSource>

IQueryable<T>,其中包含兩個序列的交集。An IQueryable<T> that contains the set intersection of the two sequences.

例外狀況

source1source2nullsource1 or source2 is null.

備註

方法會產生, 其代表以Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)結構化泛型方法的方式呼叫本身。 MethodCallExpression Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)The Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) method generates a MethodCallExpression that represents calling Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) itself as a constructed generic method. 然後, 它會MethodCallExpression將傳遞CreateQuery<TElement>(Expression)至由Provider source1參數IQueryProvider的屬性所表示之的方法。It then passes the MethodCallExpression to the CreateQuery<TElement>(Expression) method of the IQueryProvider represented by the Provider property of the source1 parameter.

因執行代表呼叫Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)之運算式樹狀架構而產生的查詢行為, 取決於source1參數類型的實作為。The query behavior that occurs as a result of executing an expression tree that represents calling Intersect<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) depends on the implementation of the type of the source1 parameter. 預期的行為是, 中source1的所有專案source2也會傳回。The expected behavior is that all the elements in source1 that are also in source2 are returned. comparer參數是用來比較元素。The comparer parameter is used to compare elements.

適用於