XPQueryExtensions.LongCountAsync<T>(IQueryable<T>, Expression<Func<T, Boolean>>, CancellationToken) Method

Asynchronously counts the number of objects that meet specific requirements in a specified selection.

Assembly : DevExpress.Xpo.v25.2.dll

Declaration

C#
VB.NET

csharp

public static Task<long> LongCountAsync<T>(
    this IQueryable<T> query,
    Expression<Func<T, bool>> predicate,
    CancellationToken cancellationToken = default(CancellationToken)
)

<ExtensionAttribute>
Public Shared Function LongCountAsync(Of T)(
    query As IQueryable(Of T),
    predicate As Expression(Of Func(Of T, Boolean)),
    cancellationToken As CancellationToken = Nothing
) As Task(Of Long)

Parameters

Name	Type	Description
query	IQueryable<T>

An XPQuery<T> that specifies a selection of persistent objects.

| | predicate | Expression<Func<T, Boolean>> |

An expression which determines requirements persistent objects need to meet.

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<Int64>

An Task that returns an Int64 value. This value demonstrates how many objects in a selection meet specific requirements.