AsyncEnumerable.Where Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Int32,CancellationToken,ValueTask<Boolean>>) |
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. |
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,CancellationToken,ValueTask<Boolean>>) |
Filters a sequence of values based on a predicate. |
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Boolean>) |
Filters a sequence of values based on a predicate. |
| Where<TSource>(IAsyncEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. |
- Source:
- Where.cs
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, int, System::Threading::CancellationToken, System::Threading::Tasks::ValueTask<bool>> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,int,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<bool>> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, int, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<bool>> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Integer, CancellationToken, ValueTask(Of Boolean))) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
- predicate
- Func<TSource,Int32,CancellationToken,ValueTask<Boolean>>
A function to test each element for a condition; the second parameter of the function represents the index of the source element.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate 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:
- Where.cs
Filters a sequence of values based on a predicate.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, System::Threading::CancellationToken, System::Threading::Tasks::ValueTask<bool>> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<bool>> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<bool>> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, CancellationToken, ValueTask(Of Boolean))) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
- predicate
- Func<TSource,CancellationToken,ValueTask<Boolean>>
A function to test each element for a condition.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate 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:
- Where.cs
Filters a sequence of values based on a predicate.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, bool> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,bool> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, bool> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Boolean)) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate 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:
- Where.cs
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ Where(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, Func<TSource, int, bool> ^ predicate);public static System.Collections.Generic.IAsyncEnumerable<TSource> Where<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, Func<TSource,int,bool> predicate);static member Where : System.Collections.Generic.IAsyncEnumerable<'Source> * Func<'Source, int, bool> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function Where(Of TSource) (source As IAsyncEnumerable(Of TSource), predicate As Func(Of TSource, Integer, Boolean)) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
An IAsyncEnumerable<T> to filter.
A function to test each element for a condition; the second parameter of the function represents the index of the source element.
Returns
An IAsyncEnumerable<T> that contains elements from the input sequence that satisfy the condition.
Exceptions
predicate 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) |
.NET feedback
.NET is an open source project. Select a link to provide feedback: