IFindFluentExtensionsSingleOrDefaultAsyncTDocument, TProjection Method |
Gets a single result or null.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.14.0+2b37a1fe1cbdbe1a020b52b77f1197b6d77575e7
Syntax public static Task<TProjection> SingleOrDefaultAsync<TDocument, TProjection>(
this IFindFluent<TDocument, TProjection> find,
CancellationToken cancellationToken = default
)
<ExtensionAttribute>
Public Shared Function SingleOrDefaultAsync(Of TDocument, TProjection) (
find As IFindFluent(Of TDocument, TProjection),
Optional cancellationToken As CancellationToken = Nothing
) As Task(Of TProjection)
[<ExtensionAttribute>]
static member SingleOrDefaultAsync :
find : IFindFluent<'TDocument, 'TProjection> *
?cancellationToken : CancellationToken
(* Defaults:
let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<'TProjection>
Parameters
- find
- Type: MongoDB.DriverIFindFluentTDocument, TProjection
The fluent find. - cancellationToken (Optional)
- Type: System.ThreadingCancellationToken
The cancellation token.
Type Parameters
- TDocument
- The type of the document.
- TProjection
- The type of the projection (same as TDocument if there is no projection).
Return Value
Type:
TaskTProjectionA Task whose result is the single result or null.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IFindFluentTDocument,
TProjection. 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