AsyncEnumerable.DefaultIfEmpty Method
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| DefaultIfEmpty<TSource>(IAsyncEnumerable<TSource>) |
Returns the elements of the specified sequence or the type parameter's default if the sequence is empty. |
| DefaultIfEmpty<TSource>(IAsyncEnumerable<TSource>, TSource) |
Returns the elements of the specified sequence or the specified value if the sequence is empty. |
- Source:
- DefaultIfEmpty.cs
Returns the elements of the specified sequence or the type parameter's default if the sequence is empty.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ DefaultIfEmpty(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source);public static System.Collections.Generic.IAsyncEnumerable<TSource?> DefaultIfEmpty<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source);static member DefaultIfEmpty : System.Collections.Generic.IAsyncEnumerable<'Source> -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function DefaultIfEmpty(Of TSource) (source As IAsyncEnumerable(Of TSource)) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
The sequence to return a default value for if it is empty.
Returns
An IAsyncEnumerable<T> object that contains the default value for the TSource type if source is empty; otherwise, source.
Exceptions
source is null.
Applies to
.NET 10 και άλλες εκδόσεις
| Προϊόν | Εκδόσεις |
|---|---|
| .NET | 8 (package-provided), 9 (package-provided), 10 (package-provided), 10 |
| .NET Standard | 2.0 (package-provided) |
- Source:
- DefaultIfEmpty.cs
Returns the elements of the specified sequence or the specified value if the sequence is empty.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static System::Collections::Generic::IAsyncEnumerable<TSource> ^ DefaultIfEmpty(System::Collections::Generic::IAsyncEnumerable<TSource> ^ source, TSource defaultValue);public static System.Collections.Generic.IAsyncEnumerable<TSource> DefaultIfEmpty<TSource>(this System.Collections.Generic.IAsyncEnumerable<TSource> source, TSource defaultValue);static member DefaultIfEmpty : System.Collections.Generic.IAsyncEnumerable<'Source> * 'Source -> System.Collections.Generic.IAsyncEnumerable<'Source><Extension()>
Public Function DefaultIfEmpty(Of TSource) (source As IAsyncEnumerable(Of TSource), defaultValue As TSource) As IAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IAsyncEnumerable<TSource>
The sequence to return a default value for if it is empty.
- defaultValue
- TSource
The value to return if the sequence is empty.
Returns
An IAsyncEnumerable<T> object that contains the default value for the TSource type if source is empty; otherwise, source.
Exceptions
source is null.
Applies to
.NET 10 και άλλες εκδόσεις
| Προϊόν | Εκδόσεις |
|---|---|
| .NET | 8 (package-provided), 9 (package-provided), 10 (package-provided), 10 |
| .NET Standard | 2.0 (package-provided) |
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