The requested page is not available for the requested platform. You are viewing the content for .NET Framework 4.5.2+ platform.
.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+

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

Asynchronously checks whether a specific object exists in a selection.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v19.2.dll

Declaration

public static Task<bool> ContainsAsync<T>(
    this IQueryable<T> query,
    T item,
    CancellationToken cancellationToken = default(CancellationToken)
)
<ExtensionAttribute>
Public Shared Function ContainsAsync(Of T)(
    query As IQueryable(Of T),
    item As T,
    cancellationToken As CancellationToken = Nothing
) As Task(Of Boolean)
public static Task<bool> ContainsAsync<T>(
    this IQueryable<T> query,
    T item,
    CancellationToken cancellationToken = default(CancellationToken)
)
<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.

cancellationToken CancellationToken

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

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.

cancellationToken CancellationToken

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

Returns

Type Description
Task<Boolean>

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

Returns

Type Description
Task<Boolean>

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

Type Parameters

Name Description
T

Type Parameters

Name Description
T
See Also