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.NET Framework 4.5.2+

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.v21.2.dll

Declaration

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

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.

See Also