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.NET 6.0+

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

Asynchronously calculates a sum of objects’ specific Int64 fields for a query. Uses a lambda expression to obtain values.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v24.1.dll

NuGet Package: DevExpress.Xpo

Declaration

public static Task<decimal> SumAsync<T>(
    this IQueryable<T> query,
    Expression<Func<T, decimal>> selector,
    CancellationToken cancellationToken = default(CancellationToken)
)

Parameters

Name Type Description
query IQueryable<T>

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

selector Expression<Func<T, Decimal>>

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

Optional Parameters

Name Type Default Description
cancellationToken CancellationToken null

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

Type Parameters

Name
T

Returns

Type Description
Task<Decimal>

A Task that returns a sum of objects’ specific Int64 fields for a query.

See Also