IAsyncCursorExtensionsFirstAsyncTDocument Method |
Returns the first document of a cursor.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver.Core (in MongoDB.Driver.Core.dll) Version: 2.21.0+5a9c3311e158910b88195f290e6d4b1b2715d2b2
Syntax public static Task<TDocument> FirstAsync<TDocument>(
this IAsyncCursor<TDocument> cursor,
CancellationToken cancellationToken = null
)
<ExtensionAttribute>
Public Shared Function FirstAsync(Of TDocument) (
cursor As IAsyncCursor(Of TDocument),
Optional cancellationToken As CancellationToken = Nothing
) As Task(Of TDocument)
[<ExtensionAttribute>]
static member FirstAsync :
cursor : IAsyncCursor<'TDocument> *
?cancellationToken : CancellationToken
(* Defaults:
let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<'TDocument>
Parameters
- cursor
- Type: MongoDB.DriverIAsyncCursorTDocument
The cursor. - cancellationToken (Optional)
- Type: System.ThreadingCancellationToken
The cancellation token.
Type Parameters
- TDocument
- The type of the document.
Return Value
Type:
TaskTDocumentA Task whose result is the first document.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IAsyncCursorTDocument. 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