AsyncEnumerable.ThenByDescending Method
Definition
Important
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Overloads
| ThenByDescending<TSource,TKey>(IOrderedAsyncEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Performs a subsequent ordering of the elements in a sequence in descending order. |
| ThenByDescending<TSource,TKey>(IOrderedAsyncEnumerable<TSource>, Func<TSource,CancellationToken,ValueTask<TKey>>, IComparer<TKey>) |
Performs a subsequent ordering of the elements in a sequence in descending order. |
ThenByDescending<TSource,TKey>(IOrderedAsyncEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>)
- Source:
- OrderBy.cs
Performs a subsequent ordering of the elements in a sequence in descending order.
public static System.Linq.IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource,TKey>(this System.Linq.IOrderedAsyncEnumerable<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IComparer<TKey>? comparer = default);static member ThenByDescending : System.Linq.IOrderedAsyncEnumerable<'Source> * Func<'Source, 'Key> * System.Collections.Generic.IComparer<'Key> -> System.Linq.IOrderedAsyncEnumerable<'Source><Extension()>
Public Function ThenByDescending(Of TSource, TKey) (source As IOrderedAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, TKey), Optional comparer As IComparer(Of TKey) = Nothing) As IOrderedAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
- TKey
The type of the key returned by keySelector.
Parameters
- source
- IOrderedAsyncEnumerable<TSource>
A sequence of values to order.
- keySelector
- Func<TSource,TKey>
A function to extract a key from each element.
- comparer
- IComparer<TKey>
An IComparer<T> to compare keys.
Returns
An IAsyncEnumerable<T> whose elements are sorted in descending order according to a key.
Exceptions
keySelector is null.
Applies to
ThenByDescending<TSource,TKey>(IOrderedAsyncEnumerable<TSource>, Func<TSource,CancellationToken,ValueTask<TKey>>, IComparer<TKey>)
- Source:
- OrderBy.cs
Performs a subsequent ordering of the elements in a sequence in descending order.
public static System.Linq.IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource,TKey>(this System.Linq.IOrderedAsyncEnumerable<TSource> source, Func<TSource,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask<TKey>> keySelector, System.Collections.Generic.IComparer<TKey>? comparer = default);static member ThenByDescending : System.Linq.IOrderedAsyncEnumerable<'Source> * Func<'Source, System.Threading.CancellationToken, System.Threading.Tasks.ValueTask<'Key>> * System.Collections.Generic.IComparer<'Key> -> System.Linq.IOrderedAsyncEnumerable<'Source><Extension()>
Public Function ThenByDescending(Of TSource, TKey) (source As IOrderedAsyncEnumerable(Of TSource), keySelector As Func(Of TSource, CancellationToken, ValueTask(Of TKey)), Optional comparer As IComparer(Of TKey) = Nothing) As IOrderedAsyncEnumerable(Of TSource)Type Parameters
- TSource
The type of the elements of source.
- TKey
The type of the key returned by keySelector.
Parameters
- source
- IOrderedAsyncEnumerable<TSource>
A sequence of values to order.
- keySelector
- Func<TSource,CancellationToken,ValueTask<TKey>>
A function to extract a key from each element.
- comparer
- IComparer<TKey>
An IComparer<T> to compare keys.
Returns
An IAsyncEnumerable<T> whose elements are sorted in descending order according to a key.
Exceptions
keySelector is null.
