ParallelEnumerable.Where Method

Definition

Filters in parallel a sequence of values based on a predicate.

Overloads

Where<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>)

Filters in parallel a sequence of values based on a predicate.

Where<TSource>(ParallelQuery<TSource>, Func<TSource,Int32,Boolean>)

Filters in parallel a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.

Where<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>)

Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs

Filters in parallel a sequence of values based on a predicate.

C#
public static System.Linq.ParallelQuery<TSource> Where<TSource>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);

Type Parameters

TSource

The type of the elements of source.

Parameters

source
ParallelQuery<TSource>

A sequence to filter.

predicate
Func<TSource,Boolean>

A function to test each element for a condition.

Returns

A sequence that contains elements from the input sequence that satisfy the condition.

Exceptions

source or predicate is a null reference (Nothing in Visual Basic).

One or more exceptions occurred during the evaluation of the query.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1
UWP 10.0

Where<TSource>(ParallelQuery<TSource>, Func<TSource,Int32,Boolean>)

Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs

Filters in parallel a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.

C#
public static System.Linq.ParallelQuery<TSource> Where<TSource>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,int,bool> predicate);

Type Parameters

TSource

The type of the elements of source.

Parameters

source
ParallelQuery<TSource>

A sequence to filter.

predicate
Func<TSource,Int32,Boolean>

A function to test each element for a condition.

Returns

A sequence that contains elements from the input sequence that satisfy the condition.

Exceptions

source or predicate is a null reference (Nothing in Visual Basic).

More than Int32.MaxValue elements are enumerated by the query.

One or more exceptions occurred during the evaluation of the query.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1
UWP 10.0