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

XPQueryExtensions.SumAsync<T>(IQueryable<T>, Expression<Func<T, Double>>, CancellationToken) Method

Asynchronously calculates a sum of objects' specific Double fields for a query. Uses a lambda expression to obtain values.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v20.2.dll


public static Task<double> SumAsync<T>(
    this IQueryable<T> query,
    Expression<Func<T, double>> selector,
    CancellationToken cancellationToken = default(CancellationToken)
Public Shared Function SumAsync(Of T)(
    query As IQueryable(Of T),
    selector As Expression(Of Func(Of T, Double)),
    cancellationToken As CancellationToken = Nothing
) As Task(Of Double)


Name Type Description
query IQueryable<T>

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

selector Expression<Func<T, Double>>

A lambda expression that gets a value from a persistent object.

Optional Parameters

Name Type Default Description
cancellationToken CancellationToken


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

Type Parameters



Type Description

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

See Also