FindFluentBaseTDocument, TProjectionCountDocumentsAsync Method |
Counts the number of documents.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.18.0+554c799eb1ec8dd732f16c739387f6664df1ba7a
Syntax public virtual Task<long> CountDocumentsAsync(
CancellationToken cancellationToken = default
)
Public Overridable Function CountDocumentsAsync (
Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Long)
abstract CountDocumentsAsync :
?cancellationToken : CancellationToken
(* Defaults:
let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<int64>
override CountDocumentsAsync :
?cancellationToken : CancellationToken
(* Defaults:
let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<int64>
Parameters
- cancellationToken (Optional)
- Type: System.ThreadingCancellationToken
The cancellation token.
Return Value
Type:
TaskInt64A Task whose result is the count.
Implements
IFindFluentTDocument, TProjectionCountDocumentsAsync(CancellationToken)Remarks
Note: when migrating from CountAsync to CountDocumentsAsync the following query operations must be replaced:
+-------------+--------------------------------+
| Operator | Replacement |
+=============+================================+
| $where | $expr |
+-------------+--------------------------------+
| $near | $geoWithin with $center |
+-------------+--------------------------------+
| $nearSphere | $geoWithin with $centerSphere |
+-------------+--------------------------------+
See Also