XPQueryExtensions.ContainsAsync<T>(IQueryable<T>, T, CancellationToken) Method

Asynchronously checks whether a specific object exists in a selection.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v24.1.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap, DevExpress.Xpo

NuGet Package: DevExpress.Xpo

Declaration

C#

public static Task<bool> ContainsAsync<T>(
    this IQueryable<T> query,
    T item,
    CancellationToken cancellationToken = default(CancellationToken)
)

VB.NET

<ExtensionAttribute>
Public Shared Function ContainsAsync(Of T)(
    query As IQueryable(Of T),
    item As T,
    cancellationToken As CancellationToken = Nothing
) As Task(Of Boolean)

Parameters

Name	Type	Description
query	IQueryable<T>	An XPQuery<T> that specifies a selection of persistent objects.
item	T	An object, which specifies a persistent object to be found in a selection.

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<Boolean>	A Task that returns true if a specific object exists in a selection. Otherwise, it returns false.