| MongoCollectionBaseTDocumentCountDocuments Method (IClientSessionHandle, FilterDefinitionTDocument, CountOptions, CancellationToken) | 
 
            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
Syntaxpublic virtual long CountDocuments(
	IClientSessionHandle session,
	FilterDefinition<TDocument> filter,
	CountOptions options = null,
	CancellationToken cancellationToken = null
)
Public Overridable Function CountDocuments ( 
	session As IClientSessionHandle,
	filter As FilterDefinition(Of TDocument),
	Optional options As CountOptions = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Long
abstract CountDocuments : 
        session : IClientSessionHandle * 
        filter : FilterDefinition<'TDocument> * 
        ?options : CountOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> int64 
override CountDocuments : 
        session : IClientSessionHandle * 
        filter : FilterDefinition<'TDocument> * 
        ?options : CountOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> 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: 
Int64
            The number of documents in the collection.
            
Implements
IMongoCollectionTDocumentCountDocuments(IClientSessionHandle, FilterDefinitionTDocument, CountOptions, CancellationToken) Remarks
Remarks
            Note: when migrating from Count to CountDocuments the following query operations must be replaced:
            
            
+-------------+--------------------------------+
| Operator    | Replacement                    |
+=============+================================+
| $where      |  $expr                         |
+-------------+--------------------------------+
| $near       |  $geoWithin with $center       |
+-------------+--------------------------------+
| $nearSphere |  $geoWithin with $centerSphere |
+-------------+--------------------------------+
 See Also
See Also