|
|
| .NET Framework Class Library |
| ParallelEnumerable..::.OrderBy<(Of <(TSource, TKey>)>) Method (ParallelQuery<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>)) |
| ParallelEnumerable Class See Also Send Feedback |
Sorts in parallel the elements of a sequence in ascending order according to a key.
Namespace:
System.Linq
Assembly:
System.Threading (in System.Threading.dll)
Syntax
| Visual Basic (Declaration) |
|---|
Public Shared Function OrderBy(Of TSource, TKey) ( _ source As ParallelQuery(Of TSource), _ keySelector As Func(Of TSource, TKey) _ ) As OrderedParallelQuery(Of TSource) |
| C# |
|---|
public static OrderedParallelQuery<TSource> OrderBy<TSource, TKey>( ParallelQuery<TSource> source, Func<TSource, TKey> keySelector ) |
Parameters
- source
- Type: System.Linq..::.ParallelQuery<(Of <(TSource>)>)
A sequence of values to order.
- keySelector
- Type: System..::.Func<(Of <(TSource, TKey>)>)
A function to extract a key from an element.
Type Parameters
- TSource
- The type of elements of source.
- TKey
- The type of the key returned by keySelector.
Return Value
An OrderedParallelQuery{TSource} whose elements are sorted according to a key.Remarks
In contrast to the sequential implementation, this is not a stable sort.
To achieve a stable sort, change a query of the form:
to instead be formed as:
| Copy Code | |
|---|---|
var ordered = source.OrderBy((e) => e.k); | |
| Copy Code | |
|---|---|
var ordered = source.Select((e,i) => new { E=e, I=i }).OrderBy((v) => v.i).Select((v) => v.e); | |
Exceptions
| Exception | Condition |
|---|---|
| System..::.ArgumentNullException | source or keySelector is a null reference (Nothing in Visual Basic). |
See Also
