AsyncEnumerable.LongCountAsync Method
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| LongCountAsync<TSource>(IAsyncEnumerable<TSource>, CancellationToken) |
Returns the number of elements in a sequence satisfy a condition. |
| LongCountAsync<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Boolean>, CancellationToken) |
Returns the number of elements in a sequence satisfy a condition. |
| LongCountAsync<TSource>(IAsyncEnumerable<TSource>, Func<TSource,CancellationToken,ValueTask<Boolean>>, CancellationToken) |
Returns the number of elements in a sequence satisfy a condition. |
- Source:
- CountAsync.cs
Returns the number of elements in a sequence satisfy a condition.
public static System.Threading.Tasks.ValueTask<long> LongCountAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, System.Threading.CancellationToken cancellationToken = default);static member LongCountAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int64><Extension()>
Public Function LongCountAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Long)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
A sequence that contains elements to be tested and counted.
- cancellationToken
- CancellationToken
The CancellationToken to monitor for cancellation requests. The default is None.
Returns
The number of elements in the input sequence that satisfy the condition in the predicate function.
Exceptions
source is null.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 8 (package-provided), 9 (package-provided), 10 (package-provided), 10 |
| .NET Standard | 2.0 (package-provided) |
- Source:
- CountAsync.cs
Returns the number of elements in a sequence satisfy a condition.
public static System.Threading.Tasks.ValueTask<long> LongCountAsync<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,bool> predicate, System.Threading.CancellationToken cancellationToken = default);static member LongCountAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, bool> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int64><Extension()>
Public Function LongCountAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Boolean), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Long)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
A sequence that contains elements to be tested and counted.
- cancellationToken
- CancellationToken
The CancellationToken to monitor for cancellation requests. The default is None.
Returns
The number of elements in the input sequence that satisfy the condition in the predicate function.
Exceptions
source is null.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 8 (package-provided), 9 (package-provided), 10 (package-provided), 10 |
| .NET Standard | 2.0 (package-provided) |
LongCountAsync<TSource>(IAsyncEnumerable<TSource>, Func<TSource,CancellationToken,ValueTask<Boolean>>, CancellationToken)
- Source:
- CountAsync.cs
Returns the number of elements in a sequence satisfy a condition.
public static System.Threading.Tasks.ValueTask<long> LongCountAsync<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 LongCountAsync : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<bool>> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int64><Extension()>
Public Function LongCountAsync(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, CancellationToken, ValueTask(Of Boolean)), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of Long)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
A sequence that contains elements to be tested and counted.
- predicate
- Func<TSource,CancellationToken,ValueTask<Boolean>>
A function to test each element for a condition.
- cancellationToken
- CancellationToken
The CancellationToken to monitor for cancellation requests. The default is None.
Returns
The number of elements in the input sequence that satisfy the condition in the predicate function.
Exceptions
source is null.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 8 (package-provided), 9 (package-provided), 10 (package-provided), 10 |
| .NET Standard | 2.0 (package-provided) |
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