XPQueryExtensions.SumAsync(IQueryable<Nullable<Double>>, CancellationToken) Method

Asynchronously calculates a sum of objects’ specific nullable Double fields for a query.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v18.2.dll

Declaration

C#

public static Task<double?> SumAsync(
    this IQueryable<double?> query,
    CancellationToken cancellationToken = default(CancellationToken)
)

VB.NET

<ExtensionAttribute>
Public Shared Function SumAsync(
    query As IQueryable(Of Double?),
    cancellationToken As CancellationToken = Nothing
) As Task(Of Double?)

Parameters

Name	Type	Description
query	IQueryable<Nullable<Double>>	An XPQuery<T> that specifies a persistent object selection.

Optional Parameters

Name	Type	Default	Description
cancellationToken	CancellationToken	*null*	A CancellationToken object that delivers a cancellation notice to the running operation.

Returns

Type	Description
Task<Nullable<Double>>	A Task that returns a sum of objects’ specific nullable Double fields for a query.