MongoQueryable.AnyAsync(TSource) Method (IMongoQueryable(TSource), CancellationToken)

MongoQueryable.AnyAsync<TSource> Method (IMongoQueryable<TSource>, CancellationToken)

Determines whether a sequence contains any elements.

Namespace: MongoDB.Driver.Linq
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.4.1

Syntax

public static Task<bool> AnyAsync<TSource>(
	this IMongoQueryable<TSource> source,
	CancellationToken cancellationToken = null
)

<ExtensionAttribute>
Public Shared Function AnyAsync(Of TSource) ( 
	source As IMongoQueryable(Of TSource),
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Boolean)

[<ExtensionAttribute>]
static member AnyAsync : 
        source : IMongoQueryable<'TSource> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<bool>

Parameters

source: Type: MongoDB.Driver.Linq.IMongoQueryable<TSource>
A sequence to check for being empty.
cancellationToken (Optional): Type: System.Threading.CancellationToken
The cancellation token.

Type Parameters

TSource: The type of the elements of source.

Return Value

Type: Task<Boolean>
true if the source sequence contains any elements; otherwise, false.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IMongoQueryable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Reference

MongoQueryable Class

AnyAsync Overload

MongoDB.Driver.Linq Namespace