.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+

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.v19.2.dll

Declaration

public static Task<double? > SumAsync(
    this IQueryable<double? > query,
    CancellationToken cancellationToken = default(CancellationToken)
)
<ExtensionAttribute>
Public Shared Function SumAsync(
    query As IQueryable(Of Double?),
    cancellationToken As CancellationToken = Nothing
) As Task(Of Double?)
public static Task<double? > SumAsync(
    this IQueryable<double? > query,
    CancellationToken cancellationToken = default(CancellationToken)
)
<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.

cancellationToken CancellationToken

A CancellationToken object that delivers a cancellation notice to the running operation.

Parameters

Name Type Description
query IQueryable<Nullable<Double>>

An XPQuery<T> that specifies a persistent object selection.

cancellationToken CancellationToken

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.

Returns

Type Description
Task<Nullable<Double>>

A Task that returns a sum of objects' specific nullable Double fields for a query.

See Also