ParallelEnumerable.Contains 方法

定义

并行确定序列是否包含指定的元素。Determines in parallel whether a sequence contains a specified element.

重载

Contains<TSource>(ParallelQuery<TSource>, TSource, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 来并行确定序列是否包含指定的元素。Determines in parallel whether a sequence contains a specified element by using a specified IEqualityComparer<T>.

Contains<TSource>(ParallelQuery<TSource>, TSource)

通过使用默认的相等比较器,并行确定某个序列是否包含指定的元素。Determines in parallel whether a sequence contains a specified element by using the default equality comparer.

Contains<TSource>(ParallelQuery<TSource>, TSource, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 来并行确定序列是否包含指定的元素。Determines in parallel whether a sequence contains a specified element by using a specified IEqualityComparer<T>.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static bool Contains(System::Linq::ParallelQuery<TSource> ^ source, TSource value, System::Collections::Generic::IEqualityComparer<TSource> ^ comparer);
public static bool Contains<TSource> (this System.Linq.ParallelQuery<TSource> source, TSource value, System.Collections.Generic.IEqualityComparer<TSource> comparer);
static member Contains : System.Linq.ParallelQuery<'Source> * 'Source * System.Collections.Generic.IEqualityComparer<'Source> -> bool
<Extension()>
Public Function Contains(Of TSource) (source As ParallelQuery(Of TSource), value As TSource, comparer As IEqualityComparer(Of TSource)) As Boolean

类型参数

TSource

source 的元素类型。The type of elements of source.

参数

source
ParallelQuery<TSource>

要在其中定位某个值的序列。A sequence in which to locate a value.

value
TSource

要在序列中定位的值。The value to locate in the sequence.

comparer
IEqualityComparer<TSource>

一个对值进行比较的相等比较器。An equality comparer to compare values.

返回

如果源序列包含具有指定值的元素,则为 true;否则为 falsetrue if the source sequence contains an element that has the specified value; otherwise, false.

异常

已使用通过 WithCancellation 传递的令牌取消了查询。The query was canceled with the token passed in through WithCancellation.

source 为 null 引用(在 Visual Basic 中为 Nothing)。source is a null reference (Nothing in Visual Basic).

评估查询期间发生一个或多个异常。One or more exceptions occurred during the evaluation of the query.

另请参阅

Contains<TSource>(ParallelQuery<TSource>, TSource)

通过使用默认的相等比较器,并行确定某个序列是否包含指定的元素。Determines in parallel whether a sequence contains a specified element by using the default equality comparer.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static bool Contains(System::Linq::ParallelQuery<TSource> ^ source, TSource value);
public static bool Contains<TSource> (this System.Linq.ParallelQuery<TSource> source, TSource value);
static member Contains : System.Linq.ParallelQuery<'Source> * 'Source -> bool
<Extension()>
Public Function Contains(Of TSource) (source As ParallelQuery(Of TSource), value As TSource) As Boolean

类型参数

TSource

source 的元素类型。The type of elements of source.

参数

source
ParallelQuery<TSource>

要在其中定位某个值的序列。A sequence in which to locate a value.

value
TSource

要在序列中定位的值。The value to locate in the sequence.

返回

如果源序列包含具有指定值的元素,则为 true;否则为 falsetrue if the source sequence contains an element that has the specified value; otherwise, false.

异常

已使用通过 WithCancellation 传递的令牌取消了查询。The query was canceled with the token passed in through WithCancellation.

source 为 null 引用(在 Visual Basic 中为 Nothing)。source is a null reference (Nothing in Visual Basic).

评估查询期间发生一个或多个异常。One or more exceptions occurred during the evaluation of the query.

另请参阅

适用于