AsyncEnumerable.CountAsync Method (System.Linq) (original) (raw)
Definition
Namespace:
Assembly:
System.Linq.AsyncEnumerable.dll
Package:
System.Linq.AsyncEnumerable v10.0.0-preview.5.25277.114
Important
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Overloads
CountAsync(IAsyncEnumerable, Func<TSource,Boolean>, CancellationToken)
Source:
Source:
Returns the number of elements in a sequence satisfy a condition.
public static System.Threading.Tasks.ValueTask<int> CountAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,bool> predicate, System.Threading.CancellationToken cancellationToken = default);static member CountAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, bool> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int><Extension()>
Public Function CountAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Boolean), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Integer)Type Parameters
TSource
The type of the elements of source.
Parameters
source
A sequence that contains elements to be tested and counted.
predicate
A function to test each element for a condition.
Returns
The number of elements in the input sequence that satisfy the condition in the predicate function.
Exceptions
The number of elements that satisfy the condition is larger than MaxValue (via the returned task).
Applies to
CountAsync(IAsyncEnumerable, Func<TSource,CancellationToken,ValueTask>, CancellationToken)
Source:
Source:
Returns the number of elements in a sequence satisfy a condition.
public static System.Threading.Tasks.ValueTask<int> CountAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<bool>> predicate, System.Threading.CancellationToken cancellationToken = default);static member CountAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<bool>> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int><Extension()>
Public Function CountAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, CancellationToken, ValueTask(Of Boolean)), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Integer)Type Parameters
TSource
The type of the elements of source.
Parameters
source
A sequence that contains elements to be tested and counted.
Returns
The number of elements in the input sequence that satisfy the condition in the predicate function.
Exceptions
The number of elements that satisfy the condition is larger than MaxValue (via the returned task).
Applies to
CountAsync(IAsyncEnumerable, CancellationToken)
Source:
Source:
Returns the number of elements in a sequence.
public static System.Threading.Tasks.ValueTask<int> CountAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, System.Threading.CancellationToken cancellationToken = default);static member CountAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int><Extension()>
Public Function CountAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Integer)Type Parameters
TSource
The type of the elements of source.
Parameters
source
A sequence that contains elements to be counted.
Returns
The number of elements in the input sequence.
Exceptions
The number of elements in source is larger than MaxValue (via the returned task).