Applies in parallel an accumulator function over a sequence. The specified
seed value is used as the initial accumulator value, and the specified
function is used to select the result value.
Namespace:
System.Linq
Assembly:
System.Threading (in System.Threading.dll)
Syntax
| Visual Basic (Declaration) |
|---|
Public Shared Function Aggregate(Of TSource, TAccumulate, TResult) ( _
source As ParallelQuery(Of TSource), _
seed As TAccumulate, _
func As Func(Of TAccumulate, TSource, TAccumulate), _
resultSelector As Func(Of TAccumulate, TResult) _
) As TResult |
| C# |
|---|
public static TResult Aggregate<TSource, TAccumulate, TResult>(
ParallelQuery<TSource> source,
TAccumulate seed,
Func<TAccumulate, TSource, TAccumulate> func,
Func<TAccumulate, TResult> resultSelector
)
|
Parameters
- source
- Type: System.Linq..::.ParallelQuery<(Of <(TSource>)>)
A sequence to aggregate over.
- seed
- Type: TAccumulate
The initial accumulator value.
- func
- Type: System..::.Func<(Of <(TAccumulate, TSource, TAccumulate>)>)
An accumulator function to be invoked on each element.
- resultSelector
- Type: System..::.Func<(Of <(TAccumulate, TResult>)>)
A function to transform the final accumulator value
into the result value.
Type Parameters
- TSource
- The type of the elements of source.
- TAccumulate
- The type of the accumulator value.
- TResult
- The type of the resulting value.
Return Value
The transformed final accumulator value.
Exceptions
| Exception | Condition |
|---|
| System..::.ArgumentNullException |
source or func or resultSelector is a null reference (Nothing in Visual Basic).
|
| System..::.AggregateException |
One or more exceptions occurred during the evaluation of the query.
|
| System..::.OperationCanceledException |
The query was canceled.
|
See Also
