Returns an Int64 that represents how many elements in a parallel sequence satisfy a condition.
Namespace:
System.Linq
Assembly:
System.Threading (in System.Threading.dll)
Syntax
| Visual Basic (Declaration) |
|---|
Public Shared Function LongCount(Of TSource) ( _
source As ParallelQuery(Of TSource), _
predicate As Func(Of TSource, Boolean) _
) As Long |
| C# |
|---|
public static long LongCount<TSource>(
ParallelQuery<TSource> source,
Func<TSource, bool> predicate
)
|
Parameters
- source
- Type: System.Linq..::.ParallelQuery<(Of <(TSource>)>)
A sequence that contains elements to be counted.
- predicate
- Type: System..::.Func<(Of <(TSource, Boolean>)>)
A function to test each element for a condition.
Type Parameters
- TSource
- The type of the elements of source.
Return Value
A number that represents how many elements in the sequence satisfy the condition
in the predicate function.
Exceptions
| Exception | Condition |
|---|
| System..::.ArgumentNullException |
source or predicate is a null reference (Nothing in Visual Basic).
|
| System..::.AggregateException |
The number of elements in source is larger than MaxValue()()().
-or-
One or more exceptions occurred during the evaluation of the query.
|
| System..::.OperationCanceledException |
The query was canceled.
|
See Also
