MongoQueryable.CountAsync<TSource> Method (IMongoQueryable<TSource>, CancellationToken) |
Returns the number of elements in a sequence.
Namespace:
MongoDB.Driver.Linq
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.19.1+3a2a09dd959482f665ffbb5df2557ec541597af4
Syntax public static Task<int> CountAsync<TSource>(
this IMongoQueryable<TSource> source,
CancellationToken cancellationToken = default
)
<ExtensionAttribute>
Public Shared Function CountAsync(Of TSource) (
source As IMongoQueryable(Of TSource),
Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Integer)
[<ExtensionAttribute>]
static member CountAsync :
source : IMongoQueryable<'TSource> *
?cancellationToken : CancellationToken
(* Defaults:
let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<int>
Parameters
- source
- Type: MongoDB.Driver.Linq.IMongoQueryable<TSource>
The IMongoQueryable<T> that contains the elements to be counted. - cancellationToken (Optional)
- Type: System.Threading.CancellationToken
The cancellation token.
Type Parameters
- TSource
- The type of the elements of source.
Return Value
Type:
Task<Int32>
The number of elements in the input sequence.
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).
See Also