| MongoCollectionBaseTDocumentCountAsync Method (IClientSessionHandle, FilterDefinitionTDocument, CountOptions, CancellationToken) | 
 Note: This API is now obsolete.
            Counts the number of documents in the collection.
            
 
    Namespace: 
   MongoDB.Driver
    Assembly:
   MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.7.3+Branch.v2.7.x.Sha.2f1f2be13a23b8520cb9c2ee8439c022f9a03efe
 Syntax
Syntax[ObsoleteAttribute("Use CountDocumentsAsync or EstimatedDocumentCountAsync instead.")]
public virtual Task<long> CountAsync(
	IClientSessionHandle session,
	FilterDefinition<TDocument> filter,
	CountOptions options = null,
	CancellationToken cancellationToken = null
)<ObsoleteAttribute("Use CountDocumentsAsync or EstimatedDocumentCountAsync instead.")>
Public Overridable Function CountAsync ( 
	session As IClientSessionHandle,
	filter As FilterDefinition(Of TDocument),
	Optional options As CountOptions = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Long)[<ObsoleteAttribute("Use CountDocumentsAsync or EstimatedDocumentCountAsync instead.")>]
abstract CountAsync : 
        session : IClientSessionHandle * 
        filter : FilterDefinition<'TDocument> * 
        ?options : CountOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<int64> 
[<ObsoleteAttribute("Use CountDocumentsAsync or EstimatedDocumentCountAsync instead.")>]
override CountAsync : 
        session : IClientSessionHandle * 
        filter : FilterDefinition<'TDocument> * 
        ?options : CountOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<int64> Parameters
- session
- Type: MongoDB.DriverIClientSessionHandle
 The session.
- filter
- Type: MongoDB.DriverFilterDefinitionTDocument
 The filter.
- options (Optional)
- Type: MongoDB.DriverCountOptions
 The options.
- cancellationToken (Optional)
- Type: System.ThreadingCancellationToken
 The cancellation token.
Return Value
Type: 
TaskInt64
            The number of documents in the collection.
            
Implements
IMongoCollectionTDocumentCountAsync(IClientSessionHandle, FilterDefinitionTDocument, CountOptions, CancellationToken) See Also
See Also