ParallelEnumerable.AsOrdered<TSource> Method (ParallelQuery<TSource>)

Enables treatment of a data source as if it were ordered, overriding the default of unordered. AsOrdered may only be invoked on generic sequences returned by AsParallel, ParallelEnumerable.Range, and ParallelEnumerable.Repeat.

Namespace:  System.Linq
Assembly:  System.Core (in System.Core.dll)

public static ParallelQuery<TSource> AsOrdered<TSource>(
	this ParallelQuery<TSource> source
)

Type Parameters

TSource

The type of elements of source.

Parameters

source
Type: System.Linq.ParallelQuery<TSource>

The input sequence.

Return Value

Type: System.Linq.ParallelQuery<TSource>
The source sequence which will maintain the original ordering in the subsequent query operators.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

ExceptionCondition
ArgumentNullException

source is a null reference (Nothing in Visual Basic).

InvalidOperationException

Thrown if source contains no elements

-or-

if source is not one of AsParallel, ParallelEnumerable.Range, or ParallelEnumerable.Repeat.

A natural tension exists between performance and preserving order in parallel processing. By default, a parallelized query behaves as if the ordering of the results is arbitrary unless AsOrdered is applied or there is an explicit OrderBy operator in the query. For more information, see Order Preservation in PLINQ.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Windows Phone 8.1, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft