ParallelEnumerable.TakeWhile(Of TSource) Method (ParallelQuery(Of TSource), Func(Of TSource, Int32, Boolean))
Returns elements from a parallel sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function.
Assemblies: System.Linq.Parallel (in System.Linq.Parallel.dll)
System.Core (in System.Core.dll)
'Declaration <ExtensionAttribute> _ Public Shared Function TakeWhile(Of TSource) ( _ source As ParallelQuery(Of TSource), _ predicate As Func(Of TSource, Integer, Boolean) _ ) As ParallelQuery(Of TSource)
The type of elements of source.
- Type: System.Linq.ParallelQuery(Of )
The sequence to return elements from.
Return ValueType: System.Linq.ParallelQuery(Of )
A sequence that contains elements from the input sequence that occur before the element at which the test no longer passes.
Usage NoteIn Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery(Of ). 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).
source or predicate is a null reference (Nothing in Visual Basic).
The query was canceled with the token passed in through WithCancellation.
More than MaxValue elements are enumerated by this query.
One or more exceptions occurred during the evaluation of the query.